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WO2025148437A1 - Multi-sheet-layer porous ceramic matrix and atomization core comprising same - Google Patents

Multi-sheet-layer porous ceramic matrix and atomization core comprising same

Info

Publication number
WO2025148437A1
WO2025148437A1 PCT/CN2024/124219 CN2024124219W WO2025148437A1 WO 2025148437 A1 WO2025148437 A1 WO 2025148437A1 CN 2024124219 W CN2024124219 W CN 2024124219W WO 2025148437 A1 WO2025148437 A1 WO 2025148437A1
Authority
WO
WIPO (PCT)
Prior art keywords
ceramic
parts
layer
layers
pore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/124219
Other languages
French (fr)
Chinese (zh)
Inventor
刘卫丽
秦飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haining New Natao Technology Co Ltd
Original Assignee
Haining New Natao Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haining New Natao Technology Co Ltd filed Critical Haining New Natao Technology Co Ltd
Publication of WO2025148437A1 publication Critical patent/WO2025148437A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/70—Manufacture

Definitions

  • the atomizing core of the electronic atomizer is used to heat the liquid to be atomized, i.e., the atomizing liquid, and atomize it into an aerosol or vapor, steam mist or smoke for the user to inhale.
  • the atomizing liquid can be a cigarette liquid or a solution containing medicine for health and medical purposes.
  • the electronic atomizer can be used for electronic cigarettes.
  • the current atomizer core of the electronic atomizer includes a porous ceramic substrate as a liquid guide, and then a heating element such as a heating wire, a heating sheet, a heating film, etc. is attached to the liquid guide.
  • the heating element is energized to heat the atomized liquid on the liquid guide and atomize it into an aerosol or steam, a vapor mist or a smoke.
  • the existing porous ceramic substrate used as a liquid guide is mainly formed into a ceramic green embryo and sintered. The microporous structure inside it is single, and the pore size is not much different.
  • the liquid guide or liquid supply speed of the liquid guide is single, which does not match the need for the heating element to have different atomized liquid consumption speeds according to different powers.
  • the liquid supply and atomization are unbalanced, resulting in the atomization core of the electronic atomizer being prone to dry burning and carbon deposition due to insufficient liquid supply during the atomization process, and also prone to oil explosion and oil leakage due to too fast liquid supply.
  • the components of the tape-cast ceramic slurry include 40 to 65 parts of ceramic powder, 30 to 50 parts of solvent, 0.1 to 3 parts of slurry dispersant, 1 to 8 parts of plasticizer and 1 to 10 parts of binder by weight, wherein the components of the ceramic powder include 25 to 55 parts of aggregate, 5 to 40 parts of pore former, 5 to 19 parts of sintering aid and 5 to 35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and the pore former contained in the ceramic green embryos of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green embryos of different groups is different.
  • the ceramic sheets have 2 to 5 groups, and each group of the ceramic sheets has 1 to 2 ceramic sheets.
  • the ceramic sheets have 3 or 4 groups, and each group of the ceramic sheets has 1 to 2 ceramic sheets.
  • the average particle size of the aggregate is 5 to 100 um, or 5 to 50 um, or 10 to 30 um.
  • the thickness of each layer of the ceramic green body is 0.1-0.6 mm, or 0.1-0.3 mm, or 0.25-0.45 mm, or 0.3-0.6 mm.
  • the solvent is a material used to convert ceramic powder into a fluid, including at least one of ethanol, isopropanol, acetone, butanone, xylene, trichloroethylene, ethyl acetate, and butyl acetate.
  • the slurry dispersant is a material used to disperse the ceramic powder in the solvent, including at least one of oleic acid, boric acid, linseed oil, castor oil, stearic acid, and triolein.
  • the binder is a material used to improve the strength of the ceramic green body, including at least one of polymethyl acrylate, ethyl cellulose, polyethylene, polyvinyl butyral, and polyisobutylene.
  • the four layers of the ceramic green body are stacked up and down and pressed into one body, and then the binder is discharged and sintered to obtain the ceramic green body. After sintering, one layer of the ceramic green body forms one layer of the ceramic sheet.
  • the weight parts of the aggregate contained in the first layer of the ceramic green body are 40 to 46 parts
  • the average particle size of the aggregate is 70 to 75 um
  • the weight parts of the pore former are 25 to 28 parts
  • the average particle size of the pore former is 40 to 50 um
  • the weight parts of the aggregate contained in the second layer of the ceramic green body are 45 to 50 parts
  • the average particle size of the aggregate is 40 to 60 um.
  • the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 40 to 50 um;
  • the weight of the aggregate contained in the third layer of ceramic green body is 40 to 48 parts, the average particle size of the aggregate is 15 to 30 um, the weight of the pore former is 25 to 30 parts, and the average particle size of the pore former is 35 to 40 um;
  • the weight of the aggregate contained in the fourth layer of ceramic green body is 35 to 45 parts, the average particle size of the aggregate is 10 to 20 um, the weight of the pore former is 25 to 30 parts, and the average particle size of the pore former is 35 to 40 um.
  • the ceramic sheets have 4 groups, each group of the ceramic sheets has 1 ceramic sheet, wherein in the order of stacking from bottom to top, the average pore size of the micropores in each layer of the ceramic sheets has a regular pattern of alternating size, the pore size of the micropores in the first layer of ceramic sheets is 40-50um, the pore size of the micropores in the second layer of ceramic sheets is 30-40um, the pore size of the micropores in the third layer of ceramic sheets is 40-50um, and the pore size of the micropores in the fourth layer of ceramic sheets is 10-20um.
  • the four layers of the ceramic green body are stacked up and down and pressed into one body, and then the binder is discharged and sintered to obtain the ceramic green body. After sintering, one layer of the ceramic green body forms one layer of the ceramic sheet.
  • the weight parts of the aggregate contained in the first layer of the ceramic green body are 40 to 46 parts
  • the average particle size of the aggregate is 70 to 75 um
  • the weight parts of the pore former are 25 to 28 parts
  • the average particle size of the pore former is 40 to 50 um
  • the weight parts of the aggregate contained in the second layer of the ceramic green body are 45 to 50 parts
  • the average particle size of the aggregate is 40 to 60 um.
  • the ceramic layers have 3 groups, each group of the ceramic layers has 2 ceramic layers, and the total number of layers is 6. Among them, in order from bottom to top, the average pore size of the micropores in each layer of ceramic layers has a gradient change from large to small.
  • the pore size of the micropores in the first group of ceramic layers is 35-50um
  • the pore size of the micropores in the second group of ceramic layers is 20-35um
  • the pore size of the micropores in the third group of ceramic layers is 10-20um.
  • the weight parts of the aggregate contained in the first group of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregate is 60 to 75 um, the weight parts of the pore former are 25 to 30 parts, and the average particle size of the pore former is The diameter is 40-50um; the weight parts of aggregate contained in the second group of ceramic green embryos are 40-48 parts, the average particle size of aggregate is 15-50um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um; the weight parts of aggregate contained in the third group of ceramic green embryos are 35-45 parts, the average particle size of aggregate is 10-20um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um.
  • a multi-layer porous ceramic atomization core comprising the multi-layer porous ceramic substrate as described above, wherein one of the upper and lower surfaces of the multi-layer porous ceramic substrate is set as an atomization surface, and the other surface is set as a liquid guide surface, electrode layers are respectively provided at both ends of the atomization surface, and the electrode layers are obtained by printing the metal slurry by screen printing and sintering, and a metal heating layer is also provided on the atomization surface, and the metal heating layer is obtained by a metal sputtering coating process or by screen printing another metal slurry and then sintering, and the metal heating layer is electrically connected to the electrode layer.
  • FIG4 is a three-dimensional schematic diagram of four layers of ceramic green sheets stacked in Example 2 of the present invention.
  • FIG6 is a three-dimensional schematic diagram of two layers of ceramic green sheets stacked as a group according to Embodiment 3 of the present invention.
  • FIG. 11 is an inverted three-dimensional exploded view of the multi-layer porous ceramic atomization core of Embodiments 5 and 6 of the present invention.
  • the distance between the micropores is relatively close. Some adjacent micropores have tiny through holes to form a connection. Therefore, the entire multi-layer porous ceramic matrix can be used as a liquid conductor, which is used to absorb liquid substances from one side and conduct them to the other side for seepage after adsorption, penetration, and flow of the micropores.
  • the above-mentioned several groups of ceramic sheets are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic sheets has a rule of alternating size or gradient change from large to small.
  • the rule when stacking ceramic green sheets is to arrange them in order according to the average particle size of the aggregate and/or the pore-forming agent, that is, based on the average particle size of the aggregate and/or the pore-forming agent in the ceramic green sheet, and can also be arranged from small to large, or two large and one small, or two small and one large, or the same in pairs and then alternating in size, so that the size of the micropores of each layer of ceramic sheets after manufacturing is also arranged according to the above rule.
  • the porosity of the micropores of each ceramic layer of the multi-layer porous ceramic matrix is 40%-65%, which means but is not limited to any value between 40%-65%, and ⁇ or 40%-45%, and ⁇ or 45%-50%, and ⁇ or 50%-55%, and ⁇ or 55%-60%, and ⁇ or 60%-65%, and ⁇ or 45-60%, and ⁇ or 48-56%.
  • each ceramic layer of the multi-layer porous ceramic matrix is 0.1 to 0.5 mm, which means but is not limited to any value between 0.1 and 0.5 mm, and ⁇ or 0.1 mm, and ⁇ or 0.2 mm, and ⁇ or 0.3 mm, and ⁇ or 0.4 mm, and ⁇ or 0.5 mm, and ⁇ or 0.1 to 0.25 mm, and or 0.2 to 0.4 mm, and or 0.25 to 0.5 mm.
  • the multi-layer porous ceramic matrix of the present invention is manufactured by stacking 1 to 3 layers of the same lamellar ceramic green embryos up and down to form a group of ceramic green embryos, and then stacking 3 to 10 groups of ceramic green embryos up and down and pressing them into one body, and then debinding and sintering them to obtain a multi-layer porous ceramic matrix.
  • a layer of the ceramic green embryo constitutes a layer of the ceramic sheet after sintering.
  • the overall thickness of the multi-layer porous ceramic substrate after sintering is generally between 1 and 6 mm.
  • the ceramic green body is made of cast ceramic slurry through a tape casting process.
  • the components of the cast ceramic slurry include 40-65 parts of ceramic powder, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder by weight, wherein the components of the ceramic powder include 25-55 parts of aggregate, 5-40 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different.
  • the average particle sizes of the aggregates and/or pore formers contained in each group of ceramic green embryos are selected to be different, including selecting different average particle sizes of the aggregates, selecting different average particle sizes of the pore formers, or selecting different average particle sizes of the aggregates and the pore formers.
  • the purpose of such selection is to make the micropore diameters of different groups of ceramic sheets formed after sintering different groups of ceramic green embryos different.
  • the average particle size of the pore-forming agent is selected to be 5 to 100 um, which means but is not limited to: any value between 5 and 100 um, and ⁇ or 5 to 10 um, and ⁇ or 10 to 20 um, and ⁇ or 20 to 30 um, and ⁇ or 30 to 40 um, and ⁇ or 40 to 50 um, and ⁇ or 50 to 60 um, and ⁇ or 60 to 70 um, and ⁇ or 70 to 80 um, and ⁇ or 80 to 90 um, and ⁇ or 90 to 100 um, and ⁇ or 5 to 50 um, and ⁇ or 50 to 100 um, and ⁇ or 15 to 80 um, and ⁇ or 25 to 60 um, and ⁇ or 55 to 95 um, and ⁇ or 65 to 85 um.
  • the sintering aid is a material used to bond aggregates and help sinter at a suitable temperature to form a porous ceramic matrix, including at least one of boron oxide, sodium silicate, silicon oxide, potassium oxide, lithium oxide, barium oxide, magnesium oxide, calcium oxide, iron oxide, titanium oxide, zinc oxide, and zirconium oxide.
  • the slurry dispersant is a material used to disperse ceramic powder in a solvent, and includes at least one of oleic acid, boric acid, linseed oil, castor oil, stearic acid, and triolein.
  • plasticizer refers to but is not limited to: any integer between 1 and 8, and ⁇ or 1 to 3 parts, and ⁇ or 3 to 5 parts, and ⁇ or 1 to 5 parts, and ⁇ or 5 to 8 parts;
  • the above components of the ceramic powder are:
  • aggregate 25-55 parts refers to but is not limited to: any integer between 25 and 55 parts, and ⁇ or 25-30 parts, and ⁇ or 30-35 parts, and ⁇ or 35-40 parts, and ⁇ or 40-45 parts, and ⁇ or 45-50 parts, and ⁇ or 50-55 parts, and ⁇ or 35-55 parts;
  • the pore-forming agent of 5 to 40 parts refers to but is not limited to: any integer between 5 and 40 parts, and ⁇ or 5 to 10 parts, and ⁇ or 10 to 15 parts, and ⁇ or 15 to 20 parts, and ⁇ or 20 to 25 parts, and ⁇ or 25 to 30 parts, and ⁇ or 30 to 35 parts, and ⁇ or 35 to 40 parts;
  • the sintering aid of 5 to 19 parts refers to but is not limited to: any integer between 5 and 19 parts, and ⁇ or 5 to 10 parts, and ⁇ or 10 to 15 parts, and ⁇ or 15 to 19 parts;
  • the powder dispersant of 5 to 35 parts refers to but is not limited to: any integer between 5 and 35 parts, and ⁇ or 5 to 10 parts, and ⁇ or 10 to 15 parts, and ⁇ or 15 to 20 parts, and ⁇ or 20 to 25 parts, and ⁇ or 25 to 30 parts, and ⁇ or 30 to 35 parts.
  • the present invention adopts a tape casting process to prepare multiple groups of ceramic green sheets with continuous different particle size structures, and stacks and presses the multiple ceramic green sheets and fires them to obtain a porous ceramic matrix with multiple layers of different pore sizes, especially a multi-layer porous ceramic matrix with a gradient pore size structure.
  • the ceramic green sheets are formed by multi-layer stacking. Compared with the one-time forming process, after the multi-layer ceramic green sheets are pressed and sintered, an interlayer interface will be generated at the microscopic level.
  • micropore diameter of the interlayer interface is between the micropore diameters of the two layers, which has a certain transition and buffering effect on the transmission of the atomized liquid, and is conducive to the storage and transmission of the atomized liquid.
  • porous ceramics with a gradient pore size structure can be prepared by stacking multiple layers of ceramic sheets. When applied to the atomization core of an electronic cigarette, the ceramic pore size structure can be gradiently adjusted according to the ceramic sheets based on different heating methods and different viscosities of the smoke liquid.
  • the porosity and pore size from the liquid guide surface to the atomization surface are adjusted layer by layer, so that the liquid supply and atomization of the porous ceramic matrix are balanced, achieving the advantages of both fast liquid guide and fine atomization, and improving the atomization experience.
  • the thickness of each layer of the ceramic green embryo will be slightly greater than the thickness of each layer of the ceramic sheet after sintering.
  • the multi-layer porous ceramic substrate after sintering is actually a whole, and no obvious stratification can be seen from the appearance and cross-section, which is generally difficult to distinguish with the naked eye.
  • the number of groups and the layer-by-layer analysis of the ceramic sheets described in this article are just grouping and stratification based on the size of the micropores inside each group and each layer of the ceramic sheets.
  • a multi-layer porous ceramic substrate 10 of the present invention is composed of four groups of ceramic sheets stacked up and down and sintered into one, the four groups of ceramic sheets include, in order from bottom to top, a first group of ceramic sheets 110, a second group of ceramic sheets 120, a third group of ceramic sheets 130, and a fourth group of ceramic sheets 140, each group of ceramic sheets is composed of one layer of ceramic sheets 100, and each layer of ceramic sheets 100 is uniformly distributed with bubble-shaped micropores (not shown in the figure), wherein the average pore size of the micropores in each group or layer of ceramic sheets is different, and the average pore size of the micropores in each group of ceramic sheets in the four groups of ceramic sheets in order from bottom to top has a gradient change from large to small, that is, from the first group of ceramic sheets 110 to the fourth group of ceramic sheets 140, the average pore size of the micropores in each group of ceramic sheets changes from large to small.
  • the pore size of the micropores in the first group of ceramic sheets 110 is 40-50um
  • the pore size of the micropores in the second group of ceramic sheets 120 is 30-40um
  • the pore size of the micropores in the third group of ceramic sheets 130 is 20-30um
  • the pore size of the micropores in the fourth group of ceramic sheets 140 is 10-20um.
  • denser shaded oblique lines represent smaller pore sizes
  • looser shaded lines represent larger pore sizes.
  • the multi-layer porous ceramic substrate 10 is made of 4 layers of flaky ceramic green embryos 11, 12, 13, 14 stacked up and down into 4 groups of ceramic green embryos and pressed into one body and then sintered by debinding.
  • a layer of the ceramic green embryo 11 (or 12, 13, 14) forms a layer of the ceramic sheet 110 (or 120, 130, 140) after sintering.
  • the ceramic green embryos 11, 12, 13, 14 are made of tape-cast ceramic slurry through a tape-casting process.
  • the pore-forming agent is a material that vaporizes and evaporates during sintering to form micropores in the porous ceramic matrix, and is a mixture of graphite, starch, and wood powder.
  • the powder dispersant is a material used to promote uniform dispersion of aggregates to prevent precipitation and accumulation, and is a mixture of paraffin, boric acid, and polyethylene.
  • the slurry dispersant is a material used to disperse ceramic powder in a solvent, and is a mixture of boric acid and linseed oil.
  • a multi-layer porous ceramic substrate 20 of the present invention is composed of four groups of ceramic layers stacked up and down and sintered into one, the four groups of ceramic layers include a first group of ceramic layers 210, a second group of ceramic layers 220, a third group of ceramic layers 230, and a fourth group of ceramic layers 240, each group of ceramic layers is composed of one layer of ceramic layers 210, or 220, or 230, or 240, and each layer of ceramic layers has bubble-shaped micropores (not shown in the figure) evenly distributed therein, wherein the average pore size of the micropores in each group of ceramic layers is different, and the average pore size of the micropores in each group of ceramic layers in the four groups of ceramic layers in a bottom-up order has a regularity of alternating size changes, that is, from the first group of ceramic layers 210 to the fourth group of ceramic layers 240, the average pore size of the micropores in each group of ceramic layers has a regularity of alternating size changes.
  • the multi-layer porous ceramic substrate 20 is manufactured by stacking four layers of flaky ceramic green embryos 21, 22, 23, and 24 up and down to form four groups of ceramic green embryos, pressing them into one body, and then debonding and sintering them.
  • a layer of ceramic green embryo 21 (or 22, 23, and 24) forms a layer of ceramic sheet 210 (or 220, 230, and 240) after sintering.
  • the ceramic green embryo is made of a tape-cast ceramic slurry through a tape-casting process, wherein the tape-cast ceramic slurry
  • the components of the material include 40-65 parts of ceramic powder, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder by weight, wherein the components of the ceramic powder include 35-50 parts of aggregate, 20-30 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in different layers of the ceramic green embryos of the same group is the same, and the average particle size of the aggregate and/or pore former contained in different groups of ceramic green embryos is different.
  • the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.5 mm. In this embodiment, the thickness of each ceramic green body is 0.6 mm.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a multi-layer porous ceramic substrate 30 of the present embodiment is composed of three groups of ceramic layers 310, 320, and 330 stacked up and down and sintered into one, each group of ceramic layers includes two layers of ceramic layers 300, and each layer of ceramic layers 300 has bubble-shaped micropores evenly distributed therein.
  • the average pore size of the micropores in ceramic layers of different layers in the same group is the same, and the average pore size of the micropores in ceramic layers of different groups is different.
  • the three groups of ceramic layers are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic layers has a gradient change rule from large to small.
  • each group of ceramic sheets has two layers of ceramic sheets 300, and the total number of sheets is 6.
  • the pore size of the micropores in the first group of ceramic sheets 310 is 35-50um
  • the pore size of the micropores in the second group of ceramic sheets 320 is 20-35um
  • the pore size of the micropores in the third group of ceramic sheets 330 is 10-20um.
  • denser shaded oblique lines represent smaller pore sizes
  • looser shaded lines represent larger pore sizes.
  • the components of the tape-cast ceramic slurry include 40 to 65 parts of ceramic powder, 30 to 50 parts of solvent, 0.1 to 3 parts of slurry dispersant, 1 to 8 parts of plasticizer and 1 to 10 parts of binder by weight, wherein the components of the ceramic powder include 35 to 48 parts of aggregate, 25 to 30 parts of pore former, 5 to 19 parts of sintering aid and 5 to 35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different.
  • the weight parts of aggregate contained in the first group of ceramic green embryos are 40-46 parts, the average particle size of aggregate is 60-75um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 40-50um;
  • the weight parts of aggregate contained in the second group of ceramic green embryos are 40-48 parts, the average particle size of aggregate is 15-50um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um;
  • the weight parts of aggregate contained in the third group of ceramic green embryos are 35-45 parts, the average particle size of aggregate is 10-20um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um.
  • the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.35mm. In this embodiment, the thickness of each ceramic green body is 0.4mm.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a multi-layer porous ceramic substrate 40 of the present embodiment is composed of four groups of ceramic layers 410, 420, 430, and 440 stacked up and down and sintered into one, each group of ceramic layers includes two layers of ceramic layers 400, and each layer of ceramic layers 400 has bubble-shaped micropores evenly distributed therein.
  • the average pore size of the micropores in the same group of ceramic layers is the same, and the average pore size of the micropores in different groups of ceramic layers is different.
  • the four groups of ceramic layers are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic layers has a gradient change rule from large to small.
  • the multi-layer porous ceramic substrate 40 of the present embodiment is formed by stacking two layers of identical flaky ceramic green embryos 4 up and down to form a group of ceramic green embryos, and by stacking four groups of ceramic green embryos 41, 42, 43, 44 up and down and pressing them into one body and then sintering them after debinding.
  • a layer of ceramic green embryo 4 forms a layer of ceramic sheet 400 after sintering.
  • the ceramic green embryo 4 is formed by a tape-casting ceramic slurry through a tape-casting process.
  • the components of the tape-casting ceramic slurry include 40 to 65 parts by weight of ceramic powder.
  • the components of the ceramic powder include 35-48 parts of aggregate, 25-30 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and the pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different.
  • the first group of ceramic green bodies contains 40 to 46 parts by weight of aggregate, the average particle size of the aggregate is 70 to 75 um, the weight of the pore former is 25 to 28 parts, and the average particle size of the pore former is 40 to 50 um;
  • the second group of ceramic green bodies contains 45 to 50 parts by weight of aggregate, the average particle size of the aggregate is 40 to 60 um, the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 4 0 ⁇ 50um;
  • the weight parts of aggregate contained in the third group of ceramic green embryos are 40 ⁇ 48 parts, the average particle size of aggregate is 15 ⁇ 30um, the weight parts of pore former are 25 ⁇ 30 parts, and the average particle size of pore former is 35 ⁇ 40um;
  • the weight parts of aggregate contained in the fourth group of ceramic green embryos are 35 ⁇ 45 parts, the average particle size of aggregate is 10 ⁇ 20um, the weight parts of pore former are 25 ⁇ 30 parts, and the average particle size of pore former is 35 ⁇ 40um.
  • the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.25 mm. In this embodiment, the thickness of each ceramic green body is 0.3 mm.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • this embodiment provides a multi-layer porous ceramic atomization core, which includes a multi-layer porous ceramic substrate 50, which can be used as a liquid-conducting surface of the atomization core.
  • a multi-layer porous ceramic substrate 50 which can be used as a liquid-conducting surface of the atomization core.
  • one of the upper and lower surfaces of the multi-layer porous ceramic substrate is selected as the atomization surface 51, and the other surface is used as the liquid-conducting surface 52.
  • Electrode layers 53 are provided at both ends of the atomization surface 51.
  • the electrode layer is printed by screen printing a metal slurry on both ends of the atomization surface 51 and sintered to obtain the electrode layer 53.
  • a metal heating layer 54 is also provided on the atomization surface 51.
  • the metal heating layer 54 is obtained by a metal sputtering coating process or by screen printing another metal slurry and then sintering.
  • the metal heating layer 54 is electrically connected to the electrode layer 53.
  • Both the upper and lower surfaces of the multi-layer porous ceramic matrix can be used as liquid guiding surfaces for introducing liquid substances, and the other surface is used as an atomizing surface for seeping out liquid substances.
  • the metal heating layer 54 also has micropores or large through holes, so that the liquid substance seeping out of the atomizing surface 51 can continue to seep out through the metal heating layer, or provide gaseous substances for volatilization into the air.
  • the metal heating layer 54 When the metal heating layer 54 is energized and working, it can heat, evaporate or atomize the liquid substance seeping out of the atomizing surface 51 to form an aerosol or aerosol, or smoke.
  • the electrode layer 53 is used to connect the two poles of a power supply to provide electrical energy to the metal heating layer 54.
  • Figure 10 of the attached drawings of the specification shows an upright three-dimensional exploded view of the multi-layer porous ceramic atomizer core of this embodiment
  • Figure 11 shows an inverted three-dimensional exploded view of the multi-layer porous ceramic atomizer core of this embodiment.
  • the multi-layer porous ceramic atomizer core of the present invention is generally installed in the position shown in Figure 11, so that the atomized liquid can flow from top to bottom by gravity and conduct to the metal heating layer.
  • the position shown in Figure 10 is for the convenience of showing the electrode layer and the metal heating layer in the decomposed structure.
  • the multi-layer porous ceramic atomization core of the present invention in which the multi-layer porous ceramic matrix 50 as a liquid conductor, has bubble-shaped micropores evenly distributed in each ceramic layer, the average pore size of the micropores in the same group of ceramic layers is the same, and the average pore size of the micropores in different groups of ceramic layers is different.
  • the average pore size of the micropores in each group of ceramic layers in a bottom-up order has a rule of alternating size or gradient change from large to small.
  • micropores are spherical or nearly spherical bubble-shaped micropores, the distance between the micropores is relatively close, and some adjacent micropores are connected by tiny through holes, so the entire multi-layer porous ceramic matrix can be used as a liquid conductor, which is used to absorb liquid substances from one side and conduct them to the other side for seepage after adsorption, penetration, and flow of the micropores.
  • the liquid-conducting liquid of the multi-layer porous ceramic atomizing core of the present invention has the aforementioned micropore pore size and the thickness structure of the ceramic layer, so that the multi-layer porous ceramic matrix has a good conduction ability to conduct liquid substances under the action of external forces such as suction, and does not flow too fast, and has a certain balance ability. When there is no external force such as suction, the micropores have a certain tension, so that the liquid substance can be quickly absorbed without flowing naturally and seeping out to cause dripping.
  • the multi-layer porous ceramic atomizing core of the present invention can be used in an electronic cigarette atomizer, and is used to heat, evaporate, and atomize the atomized liquid or electronic cigarette liquid in the electronic cigarette storage chamber.
  • the present invention adopts a tape casting process to prepare multiple groups of ceramic green embryos with continuous different particle size structures, and stacks and presses multiple ceramic green embryos and fires them to obtain a porous ceramic matrix with multiple layers of different pore sizes, especially a multi-layer porous ceramic matrix with a gradient pore size structure.
  • the ceramic green embryo is formed by a multi-layer stacking method. Compared with a one-time forming process, a multi-layer ceramic green embryo will produce an interlayer interface under a microscopic level after pressing and sintering.
  • the micropore aperture of the interlayer interface is between the micropore apertures of the two layers, which has a certain transition and buffering effect on the transmission of the atomized liquid, and is conducive to the storage and transmission of the atomized liquid.
  • a multi-layer ceramic layer can be stacked to prepare a porous ceramic with a gradient pore size structure.
  • the ceramic pore size structure can be adjusted by a gradient according to the ceramic layer according to different heating methods and different viscosities of the smoke liquid.
  • the porosity and pore size from the liquid guide surface to the atomization surface are adjusted layer by layer, so that the liquid supply and atomization of the porous ceramic matrix are balanced, and the advantages of fast liquid guide and delicate atomization are achieved, and the atomization experience is improved.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the side with a smaller pore size of the micropores is selected as the atomizing surface 51, and the other side is selected as the liquid guiding surface 52, so that the atomized liquid is more easily absorbed by the liquid guiding surface.
  • the seepage speed of the atomized liquid can be controlled, so that the liquid supply and atomization speeds are matched to better achieve a dynamic balance, thereby achieving the advantages of both fast liquid guiding and fine atomization, and improving the atomization experience of electronic cigarette atomizer users.

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Abstract

Disclosed in the present invention are a multi-sheet-layer porous ceramic matrix and an atomization core comprising same. The multi-sheet-layer porous ceramic matrix is composed of a plurality of groups of ceramic sheet layers which are stacked from top to bottom and sintered into an integral whole. Each group of ceramic sheet layers comprises one to a plurality of ceramic sheet layers. Bubble-shaped micropores are uniformly distributed in each ceramic sheet layer. The average pore diameters of the micropores in different ceramic sheet layers of the same group are the same, and the average pore diameters of the micropores in the ceramic sheet layers of different groups are different. The plurality of groups of ceramic sheet layers are sequentially arranged from bottom to top, and the average pore diameters of the micropores in each group of ceramic sheet layers have the rule of alternating or gradient change in descending order in size; and an electrode layer and a metal heating layer are provided on the atomization surface of the multi-sheet-layer porous ceramic matrix of a multi-sheet-layer porous ceramic atomization core. The beneficial effects of the present invention are as follows: the multi-sheet-layer porous ceramic matrix has a multi-sheet-layer structure and the micropores of each sheet layer form an alternating or gradient pore diameter structure, which has a transition and buffering effect on the transmission of a liquid to be atomized, so that liquid supply and atomization are balanced, and the atomization experience is enhanced.

Description

多片层多孔陶瓷基体及其雾化芯Multi-layer porous ceramic substrate and atomizing core thereof 技术领域Technical Field

本发明属于电子烟雾化器的雾化芯的技术领域，特别涉及一种多片层多孔陶瓷基体及其雾化芯。The invention belongs to the technical field of atomizing cores of electronic cigarette atomizers, and particularly relates to a multi-layer porous ceramic substrate and an atomizing core thereof.

背景技术Background Art

电子雾化器的雾化芯用于将待雾化液体即雾化液进行加热雾化成气溶胶或蒸汽、汽雾或烟雾，以便用户吸食，雾化液可以是烟液或含有药物的溶液，用于健康医疗之用途，电子雾化器可用于电子烟。The atomizing core of the electronic atomizer is used to heat the liquid to be atomized, i.e., the atomizing liquid, and atomize it into an aerosol or vapor, steam mist or smoke for the user to inhale. The atomizing liquid can be a cigarette liquid or a solution containing medicine for health and medical purposes. The electronic atomizer can be used for electronic cigarettes.

目前的电子雾化器的雾化芯包括用多孔陶瓷基体制成作为导液体，然后在导液体上贴合设置发热丝、发热片、发热膜等发热元件，发热元件通电可用以将导液体上的雾化液加热雾化成气溶胶或蒸汽、汽雾或烟雾。现有用作导液体的多孔陶瓷基体，主要是采用一次成型为陶瓷生胚并烧结成型的工艺，其内部的微孔结构单一，孔径大小相差不大，导液体的导液或供液的速度单一，与发热元件根据功率不同需要有不同雾化液消耗速度的需求不匹配，供液与雾化不平衡，导致电子雾化器的雾化芯在雾化过程中容易产生因供液不足而导致干烧、积碳的问题，也容易产生因供液过快而导致的炸油、漏油等问题。The current atomizer core of the electronic atomizer includes a porous ceramic substrate as a liquid guide, and then a heating element such as a heating wire, a heating sheet, a heating film, etc. is attached to the liquid guide. The heating element is energized to heat the atomized liquid on the liquid guide and atomize it into an aerosol or steam, a vapor mist or a smoke. The existing porous ceramic substrate used as a liquid guide is mainly formed into a ceramic green embryo and sintered. The microporous structure inside it is single, and the pore size is not much different. The liquid guide or liquid supply speed of the liquid guide is single, which does not match the need for the heating element to have different atomized liquid consumption speeds according to different powers. The liquid supply and atomization are unbalanced, resulting in the atomization core of the electronic atomizer being prone to dry burning and carbon deposition due to insufficient liquid supply during the atomization process, and also prone to oil explosion and oil leakage due to too fast liquid supply.

技术问题Technical issues

本发明所解决的技术问题是克服现有技术不足而提供一种多片层多孔陶瓷基体及其雾化芯。The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a multi-layer porous ceramic substrate and an atomizing core thereof.

技术解决方案Technical Solutions

本发明的技术解决方案是，一种多片层多孔陶瓷基体，由上下层叠并烧结为一体的若干组陶瓷片层构成，每组所述陶瓷片层包括1～若干层的陶瓷片层，每层所述陶瓷片层内均匀分布有泡状的微孔，同组不同层的所述陶瓷片层内的微孔的平均孔径相同，不同组的所述陶瓷片层内的微孔的平均孔径不同，所述若干组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化或由大到小梯度变化的规律。The technical solution of the present invention is a multi-layer porous ceramic matrix, which is composed of several groups of ceramic layers stacked up and down and sintered into one, each group of ceramic layers includes 1 to several layers of ceramic layers, each layer of the ceramic layers has bubble-shaped micropores evenly distributed, the average pore size of the micropores in the ceramic layers of different layers in the same group is the same, and the average pore size of the micropores in the ceramic layers of different groups is different, and the average pore size of the micropores in each group of ceramic layers in the order from bottom to top has a rule of alternating size or gradient change from large to small.

优选地，由1～若干层片状的陶瓷生胚上下层叠为一组陶瓷生胚以及若干组所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，所述陶瓷生胚由流延陶瓷浆料通过流延工艺制得，所述流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中所述陶瓷粉体的组分按重量份包括骨料25～55份、造孔剂5～40份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。Preferably, a group of ceramic green embryos is formed by stacking 1 to several layers of lamellar ceramic green embryos up and down, and several groups of the ceramic green embryos are stacked up and down and pressed into one body, and then the binder is discharged and sintered to obtain the ceramic green embryos. A layer of the ceramic green embryo constitutes a layer of the ceramic sheet after sintering. The ceramic green embryo is made by tape-casting ceramic slurry through a tape-casting process. The components of the tape-cast ceramic slurry include 40 to 65 parts of ceramic powder, 30 to 50 parts of solvent, 0.1 to 3 parts of slurry dispersant, 1 to 8 parts of plasticizer and 1 to 10 parts of binder by weight, wherein the components of the ceramic powder include 25 to 55 parts of aggregate, 5 to 40 parts of pore former, 5 to 19 parts of sintering aid and 5 to 35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and the pore former contained in the ceramic green embryos of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green embryos of different groups is different.

优选地，所述微孔的平均孔径为10～50um，或15～45um，或20～40um。Preferably, the average pore diameter of the micropores is 10 to 50 um, or 15 to 45 um, or 20 to 40 um.

优选地，所述微孔的孔隙率为40%-65%，或45-60%，或48-56%。Preferably, the porosity of the micropores is 40%-65%, or 45-60%, or 48-56%.

优选地，每层所述陶瓷片层的厚度为0.1～0.5mm，或0.1～0.25mm、或0.2～0.4mm、或0.25～0.5mm。Preferably, the thickness of each ceramic sheet layer is 0.1-0.5 mm, or 0.1-0.25 mm, or 0.2-0.4 mm, or 0.25-0.5 mm.

优选地，所述陶瓷片层具有2～10组，每组所述陶瓷片层具有1～3层陶瓷片层。Preferably, the ceramic sheets have 2 to 10 groups, and each group of the ceramic sheets has 1 to 3 ceramic sheets.

优选地，所述陶瓷片层具有2～5组，每组所述陶瓷片层具有1～2层陶瓷片层。Preferably, the ceramic sheets have 2 to 5 groups, and each group of the ceramic sheets has 1 to 2 ceramic sheets.

优选地，所述陶瓷片层具有3组或4组，每组所述陶瓷片层具有1～2层陶瓷片层。Preferably, the ceramic sheets have 3 or 4 groups, and each group of the ceramic sheets has 1 to 2 ceramic sheets.

优选地，所述陶瓷生胚的组分按重量份包括所述陶瓷粉体45～55份，溶剂35～45份，浆料分散剂0.1～1份，增塑剂1～5份，粘结剂3～8份。Preferably, the components of the ceramic green body include 45-55 parts of the ceramic powder, 35-45 parts of solvent, 0.1-1 part of slurry dispersant, 1-5 parts of plasticizer, and 3-8 parts of binder in parts by weight.

优选地，所述陶瓷粉体的组分按重量份包括所述骨料35～55份，造孔剂25～30份，烧结助剂15～19份，粉料分散剂5～10份。Preferably, the components of the ceramic powder include 35 to 55 parts of the aggregate, 25 to 30 parts of the pore former, 15 to 19 parts of the sintering aid, and 5 to 10 parts of the powder dispersant in parts by weight.

优选地，所述骨料的平均粒径为5～100um，或5～50um，或10～30um。Preferably, the average particle size of the aggregate is 5 to 100 um, or 5 to 50 um, or 10 to 30 um.

优选地，所述造孔剂的平均粒径为5～100um，或15～80um，或25～60um。Preferably, the average particle size of the pore former is 5 to 100 um, or 15 to 80 um, or 25 to 60 um.

优选地，每一层所述陶瓷生胚的厚度为0.1～0.6mm，或0.1～0.3mm，或0.25～0.45mm，或0.3～0.6mm。Preferably, the thickness of each layer of the ceramic green body is 0.1-0.6 mm, or 0.1-0.3 mm, or 0.25-0.45 mm, or 0.3-0.6 mm.

优选地，所述骨料是形成多片层多孔陶瓷基体的骨架的主材料，包括高岭土、硅藻土、氧化铝、氮化硅、碳化硅、石英砂、玻璃砂，黏土，长石粉、融石英、堇青石、莫来石中的至少一种。Preferably, the aggregate is the main material for forming the skeleton of the multi-layer porous ceramic matrix, including at least one of kaolin, diatomaceous earth, alumina, silicon nitride, silicon carbide, quartz sand, glass sand, clay, feldspar powder, fused quartz, cordierite, and mullite.

优选地，所述造孔剂是用以烧结时汽化蒸发并在多孔陶瓷基体内形成微孔的材料，包括石墨、淀粉、木粉、面粉、豆粉、聚苯乙烯微球、聚甲基丙烯酸甲酯微球、蔗糖、纤维中的至少一种。Preferably, the pore former is a material that vaporizes and evaporates during sintering to form micropores in the porous ceramic matrix, including at least one of graphite, starch, wood powder, flour, soybean powder, polystyrene microspheres, polymethyl methacrylate microspheres, sucrose, and fiber.

优选地，所述烧结助剂是用以粘结骨料并有助于在合适的温度下烧结形成多孔陶瓷基体的材料，包括氧化硼、硅酸钠、氧化硅、氧化钾、氧化锂、氧化钡、氧化镁、氧化钙、氧化铁、氧化钛、氧化锌、氧化锆中的至少一种。Preferably, the sintering aid is a material used to bond aggregates and help sinter at a suitable temperature to form a porous ceramic matrix, including at least one of boron oxide, sodium silicate, silicon oxide, potassium oxide, lithium oxide, barium oxide, magnesium oxide, calcium oxide, iron oxide, titanium oxide, zinc oxide, and zirconium oxide.

优选地，所述粉料分散剂是用以促进骨料均匀分散防止沉淀和积聚的材料，包括石蜡、蜂蜡、硼酸、油酸、硬脂酸、聚乙烯、聚丙烯、聚乙酸乙烯酯、聚乙烯醇缩醛、乙烯-乙酸酸乙烯共聚树脂、氯乙烯-乙酸乙烯共聚树脂、过氯乙烯树脂、聚丙烯酸酯、聚酰胺中的至少一种。Preferably, the powder dispersant is a material used to promote uniform dispersion of aggregates to prevent precipitation and accumulation, including at least one of paraffin, beeswax, boric acid, oleic acid, stearic acid, polyethylene, polypropylene, polyvinyl acetate, polyvinyl acetal, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, perchlorethylene resin, polyacrylate, and polyamide.

优选地，所述溶剂是用以把陶瓷粉体转化为流体的材料，包括乙醇、异丙醇、丙酮、丁酮、二甲苯、三氯乙烯、乙酸乙酯、乙酸丁酯中的至少一种。Preferably, the solvent is a material used to convert ceramic powder into a fluid, including at least one of ethanol, isopropanol, acetone, butanone, xylene, trichloroethylene, ethyl acetate, and butyl acetate.

优选地，所述浆料分散剂是用以将陶瓷粉体分散在所述溶剂中的材料，包括油酸、硼酸、亚麻籽油、蓖麻油、硬脂酸、三油酸甘油酯中的至少一种。Preferably, the slurry dispersant is a material used to disperse the ceramic powder in the solvent, including at least one of oleic acid, boric acid, linseed oil, castor oil, stearic acid, and triolein.

优选地，所述增塑剂是用以提高陶瓷生胚的塑性的材料，包括聚乙二醇、邻苯二甲酸二丁酯中的至少一种。Preferably, the plasticizer is a material used to improve the plasticity of the ceramic green body, including at least one of polyethylene glycol and dibutyl phthalate.

优选地，所述粘结剂是用以提高陶瓷生胚的强度的材料，包括聚丙烯酸甲酯、乙基纤维素、聚乙烯、聚乙烯醇缩丁醛、聚异丁烯中的至少一种。Preferably, the binder is a material used to improve the strength of the ceramic green body, including at least one of polymethyl acrylate, ethyl cellulose, polyethylene, polyvinyl butyral, and polyisobutylene.

优选地，所述陶瓷片层具有4组，每组所述陶瓷片层具有1层陶瓷片层，其中按自下而上层叠的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1层陶瓷片层中微孔的孔径为40～50um，第2层陶瓷片层中微孔的孔径为30～40um，第3层陶瓷片层中微孔的孔径为20～30um，第4层陶瓷片层中微孔的孔径为10～20um。Preferably, the ceramic sheets have 4 groups, each group of the ceramic sheets has 1 ceramic sheet, wherein in the order of stacking from bottom to top, the average pore size of the micropores in each layer of the ceramic sheets has a gradient change from large to small, the pore size of the micropores in the first layer of ceramic sheets is 40 to 50 um, the pore size of the micropores in the second layer of ceramic sheets is 30 to 40 um, the pore size of the micropores in the third layer of ceramic sheets is 20 to 30 um, and the pore size of the micropores in the fourth layer of ceramic sheets is 10 to 20 um.

优选地，由4层所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4层陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。Preferably, the four layers of the ceramic green body are stacked up and down and pressed into one body, and then the binder is discharged and sintered to obtain the ceramic green body. After sintering, one layer of the ceramic green body forms one layer of the ceramic sheet. In the order of stacking from bottom to top, the weight parts of the aggregate contained in the first layer of the ceramic green body are 40 to 46 parts, the average particle size of the aggregate is 70 to 75 um, the weight parts of the pore former are 25 to 28 parts, and the average particle size of the pore former is 40 to 50 um; the weight parts of the aggregate contained in the second layer of the ceramic green body are 45 to 50 parts, the average particle size of the aggregate is 40 to 60 um. m, the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 40 to 50 um; the weight of the aggregate contained in the third layer of ceramic green body is 40 to 48 parts, the average particle size of the aggregate is 15 to 30 um, the weight of the pore former is 25 to 30 parts, and the average particle size of the pore former is 35 to 40 um; the weight of the aggregate contained in the fourth layer of ceramic green body is 35 to 45 parts, the average particle size of the aggregate is 10 to 20 um, the weight of the pore former is 25 to 30 parts, and the average particle size of the pore former is 35 to 40 um.

优选地，所述陶瓷片层具有4组，每组所述陶瓷片层具有1层陶瓷片层，其中按自下而上层叠的顺序，各层陶瓷片层内的微孔的平均孔径具有大小交替变化的规律，第1层陶瓷片层中微孔的孔径为40～50um，第2层陶瓷片层中微孔的孔径为30～40um，第3层陶瓷片层中微孔的孔径为40～50um，第4层陶瓷片层中微孔的孔径为10～20um。Preferably, the ceramic sheets have 4 groups, each group of the ceramic sheets has 1 ceramic sheet, wherein in the order of stacking from bottom to top, the average pore size of the micropores in each layer of the ceramic sheets has a regular pattern of alternating size, the pore size of the micropores in the first layer of ceramic sheets is 40-50um, the pore size of the micropores in the second layer of ceramic sheets is 30-40um, the pore size of the micropores in the third layer of ceramic sheets is 40-50um, and the pore size of the micropores in the fourth layer of ceramic sheets is 10-20um.

优选地，由4层所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第4层陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。Preferably, the four layers of the ceramic green body are stacked up and down and pressed into one body, and then the binder is discharged and sintered to obtain the ceramic green body. After sintering, one layer of the ceramic green body forms one layer of the ceramic sheet. In the order of stacking from bottom to top, the weight parts of the aggregate contained in the first layer of the ceramic green body are 40 to 46 parts, the average particle size of the aggregate is 70 to 75 um, the weight parts of the pore former are 25 to 28 parts, and the average particle size of the pore former is 40 to 50 um; the weight parts of the aggregate contained in the second layer of the ceramic green body are 45 to 50 parts, the average particle size of the aggregate is 40 to 60 um. m, the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 40 to 50um; the weight of the aggregate contained in the third layer of ceramic green body is 40 to 46 parts, the average particle size of the aggregate is 70 to 75um, the weight of the pore former is 25 to 28 parts, and the average particle size of the pore former is 40 to 50um; the weight of the aggregate contained in the fourth layer of ceramic green body is 35 to 45 parts, the average particle size of the aggregate is 10 to 20um, the weight of the pore former is 25 to 30 parts, and the average particle size of the pore former is 35 to 40um.

优选地，所述陶瓷片层具有3组，每组所述陶瓷片层具有2层陶瓷片层，总片层数为6层，其中按自下而上的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1组陶瓷片层中微孔的孔径为35～50um，第2组陶瓷片层中微孔的孔径为20～35um，第3组陶瓷片层中微孔的孔径为10～20um。Preferably, the ceramic layers have 3 groups, each group of the ceramic layers has 2 ceramic layers, and the total number of layers is 6. Among them, in order from bottom to top, the average pore size of the micropores in each layer of ceramic layers has a gradient change from large to small. The pore size of the micropores in the first group of ceramic layers is 35-50um, the pore size of the micropores in the second group of ceramic layers is 20-35um, and the pore size of the micropores in the third group of ceramic layers is 10-20um.

优选地，由2层同样的陶瓷生胚上下层叠为1组陶瓷生胚并由3组不同的所述陶瓷生胚上下层叠压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为60～75um，造孔剂的重量份为25～30份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～50um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第3组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。Preferably, two layers of the same ceramic green embryos are stacked up and down to form a group of ceramic green embryos, and three groups of different ceramic green embryos are stacked up and down to form a whole, and then the binder is discharged and sintered. After sintering, one layer of the ceramic green embryo constitutes a layer of the ceramic sheet. In the order of stacking from bottom to top, the weight parts of the aggregate contained in the first group of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregate is 60 to 75 um, the weight parts of the pore former are 25 to 30 parts, and the average particle size of the pore former is The diameter is 40-50um; the weight parts of aggregate contained in the second group of ceramic green embryos are 40-48 parts, the average particle size of aggregate is 15-50um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um; the weight parts of aggregate contained in the third group of ceramic green embryos are 35-45 parts, the average particle size of aggregate is 10-20um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um.

优选地，所述陶瓷片层具有4组，每组所述陶瓷片层具有2层陶瓷片层，总片层数为8层，其中按自下而上的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1组陶瓷片层中微孔的孔径为40～50um，第2组陶瓷片层中微孔的孔径为30～40um，第3组陶瓷片层中微孔的孔径为20～30um，第4组陶瓷片层中微孔的孔径为10～20um。Preferably, the ceramic layers have 4 groups, each group of the ceramic layers has 2 ceramic layers, and the total number of layers is 8. Among them, in order from bottom to top, the average pore size of the micropores in each layer of ceramic layers has a gradient change from large to small. The pore size of the micropores in the first group of ceramic layers is 40-50um, the pore size of the micropores in the second group of ceramic layers is 30-40um, the pore size of the micropores in the third group of ceramic layers is 20-30um, and the pore size of the micropores in the fourth group of ceramic layers is 10-20um.

优选地，由2层同样的陶瓷生胚上下层叠为1组陶瓷生胚并由4组不同的所述陶瓷生胚压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，所述陶瓷生胚由流延陶瓷浆料通过流延工艺制得，其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。Preferably, two layers of the same ceramic green embryos are stacked up and down to form a group of ceramic green embryos, and four groups of different ceramic green embryos are pressed into one body and then sintered to remove the binder. After sintering, one layer of the ceramic green embryo constitutes a layer of the ceramic sheet. The ceramic green embryo is made by tape-casting ceramic slurry through a tape-casting process. In the order of stacking from bottom to top, the weight parts of aggregates contained in the first group of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregates is 70 to 75 um, the weight parts of pore-forming agents are 25 to 28 parts, and the average particle size of the pore-forming agents is 40 to 50 um; the weight parts of aggregates contained in the second group of ceramic green embryos are The weight of the aggregate in the third group of ceramic green embryos is 40-48 parts, the average particle size of the aggregate is 15-30um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um; the weight of the aggregate in the fourth group of ceramic green embryos is 35-45 parts, the average particle size of the aggregate is 10-20um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um.

本发明的另一技术解决方案是，一种多片层多孔陶瓷雾化芯，包括如上所述的多片层多孔陶瓷基体，所述多片层多孔陶瓷基体的上下两面中其中一面设为雾化面，另一面设为导液面，所述雾化面的两端分别设有电极层，所述电极层通过丝网印刷的方式将所述金属浆料印刷并经过烧结制得，所述雾化面上还设有一层金属发热层，所述金属发热层通过金属溅射镀膜的工艺或通过丝网印刷另一金属浆料后烧结的工艺制得，所述金属发热层与所述电极层电连接。Another technical solution of the present invention is a multi-layer porous ceramic atomization core, comprising the multi-layer porous ceramic substrate as described above, wherein one of the upper and lower surfaces of the multi-layer porous ceramic substrate is set as an atomization surface, and the other surface is set as a liquid guide surface, electrode layers are respectively provided at both ends of the atomization surface, and the electrode layers are obtained by printing the metal slurry by screen printing and sintering, and a metal heating layer is also provided on the atomization surface, and the metal heating layer is obtained by a metal sputtering coating process or by screen printing another metal slurry and then sintering, and the metal heating layer is electrically connected to the electrode layer.

优选地，在所述多片层多孔陶瓷基体的上下两面中选择微孔的孔径较小的一面设为雾化面，另一面设为导液面。Preferably, one of the upper and lower surfaces of the multi-layer porous ceramic substrate having the smaller pore size of micropores is selected as the atomization surface, and the other surface is selected as the liquid guiding surface.

有益效果Beneficial Effects

区别于现有的单一孔道结构的多孔陶瓷，本发明采用流延工艺制备多组多片具有连续不同粒径结构的陶瓷生胚，并将多片陶瓷生胚进行层叠压片并烧制得到具有多片层不同孔径的多孔陶瓷基体，特别是可以形成具有梯度孔径结构的多片层多孔陶瓷基体。陶瓷生胚采用多层叠压方式成型，与一次成型工艺相比，多层陶瓷生胚压制烧结后在微观下会产生层间界面，层间界面的微孔孔径介于两层微孔孔径之间，对于雾化液的传送具有一定的过渡和缓冲作用，有利于雾化液的存储与传输。此外多层陶瓷片层进行层叠方式可以制备具有梯度孔径结构的多孔陶瓷，在应用到电子烟的雾化芯时，可以根据不同发热方式、不同粘度的烟液对陶瓷孔径结构按陶瓷片层进行梯度调整，从导液面到雾化面的孔隙率、孔径逐层调节，使得多孔陶瓷基体的供液与雾化达到平衡，实现兼具导液快与雾化细腻的优点，提升雾化体验。Different from the existing porous ceramics with a single pore structure, the present invention adopts a tape casting process to prepare multiple groups of ceramic green sheets with continuous different particle size structures, and stacks and presses the multiple ceramic green sheets and fires them to obtain a porous ceramic matrix with multiple layers of different pore sizes, especially a multi-layer porous ceramic matrix with a gradient pore size structure. The ceramic green sheets are formed by multi-layer stacking. Compared with the one-time forming process, after the multi-layer ceramic green sheets are pressed and sintered, an interlayer interface will be generated at the microscopic level. The micropore diameter of the interlayer interface is between the micropore diameters of the two layers, which has a certain transition and buffering effect on the transmission of the atomized liquid, and is conducive to the storage and transmission of the atomized liquid. In addition, porous ceramics with a gradient pore size structure can be prepared by stacking multiple layers of ceramic sheets. When applied to the atomization core of an electronic cigarette, the ceramic pore size structure can be gradiently adjusted according to the ceramic sheets based on different heating methods and different viscosities of the smoke liquid. The porosity and pore size from the liquid guide surface to the atomization surface are adjusted layer by layer, so that the liquid supply and atomization of the porous ceramic matrix are balanced, achieving the advantages of both fast liquid guide and fine atomization, and improving the atomization experience.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

图1为本发明实施例一的多片层多孔陶瓷基体的剖视图；FIG1 is a cross-sectional view of a multi-layer porous ceramic substrate according to a first embodiment of the present invention;

图2为本发明实施例一的4层陶瓷生胚进行层叠的立体示意图；FIG2 is a three-dimensional schematic diagram of stacking four layers of ceramic green sheets according to Embodiment 1 of the present invention;

图3为本发明实施例二的多片层多孔陶瓷基体的剖视图；FIG3 is a cross-sectional view of a multi-layer porous ceramic substrate according to a second embodiment of the present invention;

图4为本发明实施例二的4层陶瓷生胚进行层叠的立体示意图；FIG4 is a three-dimensional schematic diagram of four layers of ceramic green sheets stacked in Example 2 of the present invention;

图5为本发明实施例三的多片层多孔陶瓷基体的剖视图；FIG5 is a cross-sectional view of a multi-layer porous ceramic substrate according to a third embodiment of the present invention;

图6为本发明实施例三的2层陶瓷生胚层叠为一组的立体示意图；FIG6 is a three-dimensional schematic diagram of two layers of ceramic green sheets stacked as a group according to Embodiment 3 of the present invention;

图7为本发明实施例三的3组陶瓷生胚进行层叠的立体示意图；FIG7 is a three-dimensional schematic diagram of three groups of ceramic green sheets stacked in Example 3 of the present invention;

图8为本发明实施例四的多片层多孔陶瓷基体的剖视图；FIG8 is a cross-sectional view of a multi-layer porous ceramic substrate according to a fourth embodiment of the present invention;

图9为本发明实施例四的4组陶瓷生胚进行层叠的立体示意图；FIG9 is a three-dimensional schematic diagram of four groups of ceramic green sheets stacked in Example 4 of the present invention;

图10为本发明实施例五六的多片层多孔陶瓷雾化芯正置立体分解图；FIG10 is an upright three-dimensional exploded view of a multi-layer porous ceramic atomizing core according to Embodiments 5 and 6 of the present invention;

图11为本发明实施例五六的多片层多孔陶瓷雾化芯倒置立体分解图。FIG. 11 is an inverted three-dimensional exploded view of the multi-layer porous ceramic atomization core of Embodiments 5 and 6 of the present invention.

本发明的最佳实施方式Best Mode for Carrying Out the Invention

为了为便于行文描述和更好地说明本发明及其实施例，本文中有关“上”、“下”、“正置”、“倒置”等指示方向或位置关系的术语或描述，均是指附图中装置或元件放置的方向或位置，并非用于限定所指示的装置、元件或组成部分必须具有特定方位，或以特定方位进行构造和操作，在转换方向和位置的情况下，则上述方位用语也会相应变化。此外，还有术语“第1”、“第2”…等主要是用于区分不同的装置、元件或组成部分，并非用于表明或暗示所指示装置、元件或组成部分的相对重要性或绝对的顺序和数量。In order to facilitate the description and better illustrate the present invention and its embodiments, the terms or descriptions indicating directions or positional relationships such as "upper", "lower", "upright", and "inverted" in this document all refer to the directions or positions of the devices or components in the drawings, and are not used to limit the indicated devices, components, or components to have a specific orientation, or to be constructed and operated in a specific orientation. In the case of changing the direction and position, the above-mentioned orientation terms will also change accordingly. In addition, there are terms such as "first", "second", etc., which are mainly used to distinguish different devices, components, or components, and are not used to indicate or imply the relative importance or absolute order and quantity of the indicated devices, components, or components.

本发明的一种多片层多孔陶瓷基体，由上下层叠并烧结为一体的若干组例如3～10组陶瓷片层构成，每组陶瓷片层包括1～若干层例如1～3层的陶瓷片层，每层陶瓷片层内均匀分布有泡状的微孔，同组不同层的陶瓷片层内的微孔的平均孔径相同，不同组的陶瓷片层内的微孔的平均孔径不同，若干组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化或由大到小梯度变化的规律。微孔是圆球形或近似圆球形泡状的微孔，微孔与微孔之间的距离较近，部分相邻的微孔之间具有微小的通孔而构成连通，故整个多片层多孔陶瓷基体可作为导液体，用于将液态物质从其中的一面吸入而经过微孔的吸附、渗透、流动后传导至另一面渗出。The multi-layer porous ceramic matrix of the present invention is composed of several groups, such as 3 to 10 groups of ceramic sheets, which are stacked up and down and sintered into one. Each group of ceramic sheets includes 1 to several layers, such as 1 to 3 layers of ceramic sheets. Bubble-shaped micropores are evenly distributed in each layer of ceramic sheets. The average pore size of the micropores in different layers of the same group of ceramic sheets is the same, and the average pore size of the micropores in different groups of ceramic sheets is different. The average pore size of the micropores in each group of ceramic sheets in a bottom-up order has a rule of alternating size changes or gradient changes from large to small. The micropores are spherical or nearly spherical bubble-shaped micropores. The distance between the micropores is relatively close. Some adjacent micropores have tiny through holes to form a connection. Therefore, the entire multi-layer porous ceramic matrix can be used as a liquid conductor, which is used to absorb liquid substances from one side and conduct them to the other side for seepage after adsorption, penetration, and flow of the micropores.

另外，上述若干组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化或由大到小梯度变化的规律，在其他实施例中，层叠陶瓷生胚时的规律，按骨料和\或造孔剂的平均粒径的大小为排列顺序，即以陶瓷生胚中的骨料和\或造孔剂的平均粒径为依据，还可以按从小到大，或两大一小，或两小一大，或两两相同再大小交替变化等规律进行排列，以便制成后各层陶瓷片层的微孔孔径的大小也以上述规律排列。In addition, the above-mentioned several groups of ceramic sheets are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic sheets has a rule of alternating size or gradient change from large to small. In other embodiments, the rule when stacking ceramic green sheets is to arrange them in order according to the average particle size of the aggregate and/or the pore-forming agent, that is, based on the average particle size of the aggregate and/or the pore-forming agent in the ceramic green sheet, and can also be arranged from small to large, or two large and one small, or two small and one large, or the same in pairs and then alternating in size, so that the size of the micropores of each layer of ceramic sheets after manufacturing is also arranged according to the above rule.

本发明的多片层多孔陶瓷基体，每层陶瓷片层内微孔的平均孔径为10～50um，微孔的孔隙率为40%-65%，每层陶瓷片层的厚度为0.1～0.5mm。以上微孔的孔径以及陶瓷片层的厚度结构，使得多片层多孔陶瓷基体在外力如吸力作用下具有传导液态物质的良好导通能力，又不至于流通太快，具有一定的平衡能力，在无外力如吸力作用时，微孔具有一定张力，可吸附柱液态物质而不至于自然流动而渗出造成滴漏。本发明的多片层多孔陶瓷基体可用于传导雾化液的导液体。The multi-layer porous ceramic substrate of the present invention has an average pore size of 10 to 50 um in each ceramic layer, a porosity of 40% to 65%, and a thickness of 0.1 to 0.5 mm in each ceramic layer. The above pore size of the micropores and the thickness structure of the ceramic layer enable the multi-layer porous ceramic substrate to have a good conduction ability to conduct liquid substances under the action of external forces such as suction, and not to flow too fast, and to have a certain balance ability. When there is no external force such as suction, the micropores have a certain tension, which can adsorb the column liquid substances without flowing naturally and seeping out to cause dripping. The multi-layer porous ceramic substrate of the present invention can be used as a liquid conductor for conducting atomized liquid.

本发明中，上述多片层多孔陶瓷基体内每层陶瓷片层的微孔的平均孔径为10～50um，是指包括但不限于10～50um之间的任一数值，和\或10～20um，和\或20～30um，和\或30～40um，和\或40～50um，和\或15～45um，和\或20～40um。In the present invention, the average pore size of the micropores of each ceramic layer in the above-mentioned multi-layer porous ceramic matrix is 10 to 50 um, which means but is not limited to any value between 10 and 50 um, and\or 10 to 20 um, and\or 20 to 30 um, and\or 30 to 40 um, and\or 40 to 50 um, and\or 15 to 45 um, and\or 20 to 40 um.

多片层多孔陶瓷基体的每层陶瓷片层的微孔的孔隙率为40%-65%，是指包括但不限于40%-65%之间的任一数值，和\或40%-45%，和\或45%-50%，和\或50%-55%，和\或55%-60%，和\或60%-65%，和\或45-60%，和\或48-56%。The porosity of the micropores of each ceramic layer of the multi-layer porous ceramic matrix is 40%-65%, which means but is not limited to any value between 40%-65%, and\or 40%-45%, and\or 45%-50%, and\or 50%-55%, and\or 55%-60%, and\or 60%-65%, and\or 45-60%, and\or 48-56%.

多片层多孔陶瓷基体的每层陶瓷片层的厚度为0.1～0.5mm，是指包括但不限于0.1～0.5mm之间的任一数值，和\或0.1mm，和\或0.2mm，和\或0.3mm，和\或0.4mm，和\或0.5mm，和\或0.1～0.25mm、和或0.2～0.4mm、和或0.25～0.5mm。The thickness of each ceramic layer of the multi-layer porous ceramic matrix is 0.1 to 0.5 mm, which means but is not limited to any value between 0.1 and 0.5 mm, and\or 0.1 mm, and\or 0.2 mm, and\or 0.3 mm, and\or 0.4 mm, and\or 0.5 mm, and\or 0.1 to 0.25 mm, and or 0.2 to 0.4 mm, and or 0.25 to 0.5 mm.

为了制得具有上述参数的多片层多孔陶瓷基体，本发明的多片层多孔陶瓷基体在制造时，由1～3层片状的相同的陶瓷生胚上下层叠为1组陶瓷生胚，再由3～10组陶瓷生胚上下层叠并压制成一体后排胶烧结制得多片层多孔陶瓷基体，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层。In order to obtain a multi-layer porous ceramic matrix with the above-mentioned parameters, the multi-layer porous ceramic matrix of the present invention is manufactured by stacking 1 to 3 layers of the same lamellar ceramic green embryos up and down to form a group of ceramic green embryos, and then stacking 3 to 10 groups of ceramic green embryos up and down and pressing them into one body, and then debinding and sintering them to obtain a multi-layer porous ceramic matrix. A layer of the ceramic green embryo constitutes a layer of the ceramic sheet after sintering.

本发明实施例中，烧结后的多片层多孔陶瓷基体的整体厚度一般介于1～6mm之间。In the embodiment of the present invention, the overall thickness of the multi-layer porous ceramic substrate after sintering is generally between 1 and 6 mm.

陶瓷生胚由流延陶瓷浆料通过流延工艺制得，流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中陶瓷粉体的组分按重量份包括骨料25～55份、造孔剂5～40份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。选择各组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同，包括选择骨料的平均粒径不同、或选择造孔剂的平均粒径不同、或选择骨料与造孔剂的平均粒径均不相同，如此选择的目的在于使得不同组陶瓷生胚烧结后形成的不同组的陶瓷片层内的微孔孔径不同。The ceramic green body is made of cast ceramic slurry through a tape casting process. The components of the cast ceramic slurry include 40-65 parts of ceramic powder, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder by weight, wherein the components of the ceramic powder include 25-55 parts of aggregate, 5-40 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different. The average particle sizes of the aggregates and/or pore formers contained in each group of ceramic green embryos are selected to be different, including selecting different average particle sizes of the aggregates, selecting different average particle sizes of the pore formers, or selecting different average particle sizes of the aggregates and the pore formers. The purpose of such selection is to make the micropore diameters of different groups of ceramic sheets formed after sintering different groups of ceramic green embryos different.

本发明的多片层多孔陶瓷基体在制造时，采用流延工艺制成的每1层的陶瓷生胚的厚度0.1～0.6mm，是指包括但不限于：0.1～0.6mm之间的任一数值，和\或0.1mm，和\或0.2mm，和\或0.3mm，和\或0.4mm，和\或0.5mm，和\或0.6mm，和\或0.1～0.3mm，和或0.25～0.45mm，和或0.3～0.6mm。When manufacturing the multi-layer porous ceramic matrix of the present invention, the thickness of each layer of the ceramic green body made by the casting process is 0.1 to 0.6 mm, which means but is not limited to: any value between 0.1 and 0.6 mm, and\or 0.1 mm, and\or 0.2 mm, and\or 0.3 mm, and\or 0.4 mm, and\or 0.5 mm, and\or 0.6 mm, and\or 0.1 to 0.3 mm, and or 0.25 to 0.45 mm, and or 0.3 to 0.6 mm.

其中，骨料是形成多片层多孔陶瓷基体的骨架的主材料，包括高岭土、硅藻土、氧化铝、氮化硅、碳化硅、石英砂、玻璃砂，黏土，长石粉、融石英、堇青石、莫来石中的至少一种。本发明中，因在陶瓷基体内制造产生微孔的需要，对骨料的粒径具有一定要求，选择骨料的平均粒径为5～100um，是指包括但不限于：5～100 um之间的任一数值，和\或5～10um，和\或10～20um、和\或20～30um、和\或30～40um，和\或40～50um、和\或50～60um、和\或60～70um、和\或70～80um、和\或80～90um、和\或90～100um、和\或5～50um、和\或10～30um、和\或50～100um，和\或55～85um。Among them, the aggregate is the main material for forming the skeleton of the multi-layer porous ceramic matrix, including at least one of kaolin, diatomaceous earth, alumina, silicon nitride, silicon carbide, quartz sand, glass sand, clay, feldspar powder, fused quartz, cordierite, and mullite. In the present invention, due to the need to produce micropores in the ceramic matrix, certain requirements are placed on the particle size of the aggregate. The average particle size of the aggregate is selected to be 5 to 100 um, which includes but is not limited to: any value between 5 and 100 um, and\or 5 to 10 um, and\or 10 to 20 um, and\or 20 to 30 um, and\or 30 to 40 um, and\or 40 to 50 um, and\or 50 to 60 um, and\or 60 to 70 um, and\or 70 to 80 um, and\or 80 to 90 um, and\or 90 to 100 um, and\or 5 to 50 um, and\or 10 to 30 um, and\or 50 to 100 um, and\or 55 to 85 um.

造孔剂是用以烧结时汽化蒸发并在多孔陶瓷基体内形成微孔的材料，包括石墨、淀粉、木粉、面粉、豆粉、聚苯乙烯微球、聚甲基丙烯酸甲酯微球、蔗糖、纤维中的至少一种。本发明中，因在陶瓷基体内制造产生微孔的需要，对造孔剂的粒径也具有一定要求，选择造孔剂的平均粒径为5～100um，是指包括但不限于：5～100 um之间的任一数值，和\或5～10um，和\或10～20um、和\或20～30um、和\或30～40um，和\或40～50um、和\或50～60um、和\或60～70um、和\或70～80um、和\或80～90um、和\或90～100um、和\或5～50um，和\或50～100um，和\或15～80um，和\或25～60um，和\或55～95um，和\或65～85um。The pore former is a material that vaporizes and evaporates during sintering to form micropores in the porous ceramic matrix, including at least one of graphite, starch, wood powder, flour, bean powder, polystyrene microspheres, polymethyl methacrylate microspheres, sucrose, and fiber. In the present invention, due to the need to produce micropores in the ceramic matrix, there are certain requirements for the particle size of the pore-forming agent. The average particle size of the pore-forming agent is selected to be 5 to 100 um, which means but is not limited to: any value between 5 and 100 um, and\or 5 to 10 um, and\or 10 to 20 um, and\or 20 to 30 um, and\or 30 to 40 um, and\or 40 to 50 um, and\or 50 to 60 um, and\or 60 to 70 um, and\or 70 to 80 um, and\or 80 to 90 um, and\or 90 to 100 um, and\or 5 to 50 um, and\or 50 to 100 um, and\or 15 to 80 um, and\or 25 to 60 um, and\or 55 to 95 um, and\or 65 to 85 um.

烧结助剂是用以粘结骨料并有助于在合适的温度下烧结形成多孔陶瓷基体的材料，包括氧化硼、硅酸钠、氧化硅、氧化钾、氧化锂、氧化钡、氧化镁、氧化钙、氧化铁、氧化钛、氧化锌、氧化锆中的至少一种。The sintering aid is a material used to bond aggregates and help sinter at a suitable temperature to form a porous ceramic matrix, including at least one of boron oxide, sodium silicate, silicon oxide, potassium oxide, lithium oxide, barium oxide, magnesium oxide, calcium oxide, iron oxide, titanium oxide, zinc oxide, and zirconium oxide.

粉料分散剂是用以促进骨料均匀分散防止沉淀和积聚的材料，包括石蜡、蜂蜡、硼酸、油酸、硬脂酸、聚乙烯、聚丙烯、聚乙酸乙烯酯、聚乙烯醇缩醛、乙烯-乙酸酸乙烯共聚树脂、氯乙烯-乙酸乙烯共聚树脂、过氯乙烯树脂、聚丙烯酸酯、聚酰胺中的至少一种。Powder dispersant is a material used to promote uniform dispersion of aggregates and prevent precipitation and accumulation, including at least one of paraffin, beeswax, boric acid, oleic acid, stearic acid, polyethylene, polypropylene, polyvinyl acetate, polyvinyl acetal, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, perchlorethylene resin, polyacrylate, and polyamide.

溶剂是用以把陶瓷粉体转化为流体的材料，包括乙醇、异丙醇、丙酮、丁酮、二甲苯、三氯乙烯、乙酸乙酯、乙酸丁酯中的至少一种。The solvent is a material used to convert ceramic powder into a fluid, and includes at least one of ethanol, isopropanol, acetone, butanone, xylene, trichloroethylene, ethyl acetate, and butyl acetate.

浆料分散剂是用以将陶瓷粉体分散在溶剂中的材料，包括油酸、硼酸、亚麻籽油、蓖麻油、硬脂酸、三油酸甘油酯中的至少一种。The slurry dispersant is a material used to disperse ceramic powder in a solvent, and includes at least one of oleic acid, boric acid, linseed oil, castor oil, stearic acid, and triolein.

增塑剂是用以提高陶瓷生胚的塑性的材料，包括聚乙二醇、邻苯二甲酸二丁酯中的至少一种。The plasticizer is a material used to improve the plasticity of the ceramic green body, and includes at least one of polyethylene glycol and dibutyl phthalate.

粘结剂是用以提高陶瓷生胚的强度的材料，包括聚丙烯酸甲酯、乙基纤维素、聚乙烯、聚乙烯醇缩丁醛、聚异丁烯中的至少一种。The binder is a material used to improve the strength of the ceramic green body, and includes at least one of polymethyl acrylate, ethyl cellulose, polyethylene, polyvinyl butyral, and polyisobutylene.

本发明的多片层多孔陶瓷基体在制造时，流延陶瓷浆料的上述组分：When manufacturing the multi-layer porous ceramic substrate of the present invention, the above components of the cast ceramic slurry are:

其中陶瓷粉体40～65份，是指包括但不限于：40～65之间任一整数份、和\或40～45份、和\或45～50份、和\或50～55份；和\或55～60份、和\或60～65份、和\或45～55份。The ceramic powder of 40 to 65 parts refers to but is not limited to: any integer between 40 and 65 parts, and\or 40 to 45 parts, and\or 45 to 50 parts, and\or 50 to 55 parts; and\or 55 to 60 parts, and\or 60 to 65 parts, and\or 45 to 55 parts.

其中溶剂30～50份，是指包括但不限于：30～50之间任一整数份、和\或31～35份、和\或35～40份、和\或40～45份、和\或45～50份、和\或35～45份；The solvent 30-50 parts refers to but is not limited to: any integer between 30-50 parts, and\or 31-35 parts, and\or 35-40 parts, and\or 40-45 parts, and\or 45-50 parts, and\or 35-45 parts;

其中浆料分散剂0.1～3份，是指包括但不限于：0.1份、0.2份、0.3份、0.4份、0.5份、0.6份、0.7份、0.8份、0.9份、1份、1.1份…3份，和\或0.1～1份、和\或1.1～2份、和\或2.1～3份；Wherein, 0.1 to 3 parts of slurry dispersant refers to but is not limited to: 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 1.1 part...3 parts, and\or 0.1 to 1 part, and\or 1.1 to 2 parts, and\or 2.1 to 3 parts;

其中增塑剂1～8份，是指包括但不限于：1～8之间任一整数份、和\或1～3份、和\或3～5份、和\或1～5份、和\或5～8份；Wherein 1 to 8 parts of plasticizer refers to but is not limited to: any integer between 1 and 8, and\or 1 to 3 parts, and\or 3 to 5 parts, and\or 1 to 5 parts, and\or 5 to 8 parts;

其中粘结剂1～10份，是指包括但不限于：1～10之间任一整数份、和\或1～3份、和\或3～5份、和\或5～8份、和\或8～10份、和\或3～8份。The term "binder" refers to any integer between 1 and 10 parts, and/or 1 to 3 parts, and/or 3 to 5 parts, and/or 5 to 8 parts, and/or 8 to 10 parts, and/or 3 to 8 parts.

本发明的多片层多孔陶瓷基体在制造时，陶瓷粉体的上述组分：When manufacturing the multi-layer porous ceramic substrate of the present invention, the above components of the ceramic powder are:

其中骨料25～55份，是指包括但不限于：25～55之间任一整数份、和\或25～30份、和\或30～35份、和\或35～40份、和\或40～45份、和\或45～50份、和\或50～55份、和\或35～55份；The term "aggregate 25-55 parts" refers to but is not limited to: any integer between 25 and 55 parts, and\or 25-30 parts, and\or 30-35 parts, and\or 35-40 parts, and\or 40-45 parts, and\or 45-50 parts, and\or 50-55 parts, and\or 35-55 parts;

其中造孔剂5～40份，是指包括但不限于：5～40之间任一整数份、和\或5～10份、和\或10～15份、和\或15～20份、和\或20～25份、和\或25～30份、和\或30～35份、和\或35～40份；The pore-forming agent of 5 to 40 parts refers to but is not limited to: any integer between 5 and 40 parts, and\or 5 to 10 parts, and\or 10 to 15 parts, and\or 15 to 20 parts, and\or 20 to 25 parts, and\or 25 to 30 parts, and\or 30 to 35 parts, and\or 35 to 40 parts;

其中烧结助剂5～19份，是指包括但不限于：5～19之间任一整数份、和\或5～10份、和\或10～15份、和\或15～19份；The sintering aid of 5 to 19 parts refers to but is not limited to: any integer between 5 and 19 parts, and\or 5 to 10 parts, and\or 10 to 15 parts, and\or 15 to 19 parts;

其中粉料分散剂5～35份，是指包括但不限于：5～35之间任一整数份、和\或5～10份、和\或10～15份、和\或15～20份、和\或20～25份、和\或25～30份、和\或30～35份。The powder dispersant of 5 to 35 parts refers to but is not limited to: any integer between 5 and 35 parts, and\or 5 to 10 parts, and\or 10 to 15 parts, and\or 15 to 20 parts, and\or 20 to 25 parts, and\or 25 to 30 parts, and\or 30 to 35 parts.

区别于现有的单一孔道结构的多孔陶瓷，本发明通过采用流延工艺制备多组多片具有连续不同粒径结构的陶瓷生胚，并将多片陶瓷生胚进行层叠压片并烧制得到具有多片层不同孔径的多孔陶瓷基体，特别是可以形成具有梯度孔径结构的多片层多孔陶瓷基体。陶瓷生胚采用多层叠压方式成型，与一次成型工艺相比，多层陶瓷生胚压制烧结后在微观下会产生层间界面，层间界面的微孔孔径介于两层微孔孔径之间，对于雾化液的传送具有一定的过渡和缓冲作用，有利于雾化液的存储与传输。此外多层陶瓷片层进行层叠方式可以制备具有梯度孔径结构的多孔陶瓷，在应用到电子烟的雾化芯时，可以根据不同发热方式、不同粘度的烟液对陶瓷孔径结构按陶瓷片层进行梯度调整，从导液面到雾化面的孔隙率、孔径逐层调节，使得多孔陶瓷基体的供液与雾化达到平衡，实现兼具导液快与雾化细腻的优点，提升雾化体验。Different from the existing porous ceramics with a single pore structure, the present invention adopts a tape casting process to prepare multiple groups of ceramic green sheets with continuous different particle size structures, and stacks and presses the multiple ceramic green sheets and fires them to obtain a porous ceramic matrix with multiple layers of different pore sizes, especially a multi-layer porous ceramic matrix with a gradient pore size structure. The ceramic green sheets are formed by multi-layer stacking. Compared with the one-time forming process, after the multi-layer ceramic green sheets are pressed and sintered, an interlayer interface will be generated at the microscopic level. The micropore diameter of the interlayer interface is between the micropore diameters of the two layers, which has a certain transition and buffering effect on the transmission of the atomized liquid, and is conducive to the storage and transmission of the atomized liquid. In addition, porous ceramics with a gradient pore size structure can be prepared by stacking multiple layers of ceramic sheets. When applied to the atomization core of an electronic cigarette, the ceramic pore size structure can be gradiently adjusted according to the ceramic sheets based on different heating methods and different viscosities of the smoke liquid. The porosity and pore size from the liquid guide surface to the atomization surface are adjusted layer by layer, so that the liquid supply and atomization of the porous ceramic matrix are balanced, achieving the advantages of both fast liquid guide and fine atomization, and improving the atomization experience.

需要特别说明的是，本发明的多片层多孔陶瓷基体在制造时，由于陶瓷生胚层叠并压制的原因，每层陶瓷生胚的厚度将略大于烧结后的每层陶瓷片层的厚度，烧结后的多片层多孔陶瓷基体实际上是一个整体，从外表及剖面均看不出有明显的分层，这一般从肉眼难以分辨，本文中所述组数并按层分析陶瓷片层，只是根据每组、每层陶瓷片层内部的微孔孔径的大小，进行分组和分层。It should be particularly noted that when the multi-layer porous ceramic substrate of the present invention is manufactured, due to the stacking and pressing of the ceramic green embryos, the thickness of each layer of the ceramic green embryo will be slightly greater than the thickness of each layer of the ceramic sheet after sintering. The multi-layer porous ceramic substrate after sintering is actually a whole, and no obvious stratification can be seen from the appearance and cross-section, which is generally difficult to distinguish with the naked eye. The number of groups and the layer-by-layer analysis of the ceramic sheets described in this article are just grouping and stratification based on the size of the micropores inside each group and each layer of the ceramic sheets.

本发明的实施方式Embodiments of the present invention

下面将通过具体实施例对本发明进行详细说明。The present invention will be described in detail below through specific embodiments.

实施例1：Embodiment 1:

如图1所示，本发明的一种多片层多孔陶瓷基体10，由上下层叠并烧结为一体的4组陶瓷片层构成，该4组陶瓷片层按自下而上的顺序包括第1组陶瓷片层110、第2组陶瓷片层120、第3组陶瓷片层130、第4组陶瓷片层140，每组陶瓷片层由1层陶瓷片层100构成，每层陶瓷片层100内均匀分布有泡状的微孔（图中未示），其中，各组或各层的陶瓷片层内的微孔的平均孔径均不同，4组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，即自第1组陶瓷片层110到第4组陶瓷片层140，各组陶瓷片层内的微孔的平均孔径为由大到小的梯度变化。其中，按自下而上层叠的顺序，第1组陶瓷片层110中微孔的孔径为40～50um，第2组陶瓷片层120中微孔的孔径为30～40um，第3组陶瓷片层130中微孔的孔径为20～30um，第4组陶瓷片层140中微孔的孔径为10～20um。图1中阴影部分斜线较密集代表孔径较小，较疏松代表孔径较大。As shown in FIG1 , a multi-layer porous ceramic substrate 10 of the present invention is composed of four groups of ceramic sheets stacked up and down and sintered into one, the four groups of ceramic sheets include, in order from bottom to top, a first group of ceramic sheets 110, a second group of ceramic sheets 120, a third group of ceramic sheets 130, and a fourth group of ceramic sheets 140, each group of ceramic sheets is composed of one layer of ceramic sheets 100, and each layer of ceramic sheets 100 is uniformly distributed with bubble-shaped micropores (not shown in the figure), wherein the average pore size of the micropores in each group or layer of ceramic sheets is different, and the average pore size of the micropores in each group of ceramic sheets in the four groups of ceramic sheets in order from bottom to top has a gradient change from large to small, that is, from the first group of ceramic sheets 110 to the fourth group of ceramic sheets 140, the average pore size of the micropores in each group of ceramic sheets changes from large to small. Among them, in the order of stacking from bottom to top, the pore size of the micropores in the first group of ceramic sheets 110 is 40-50um, the pore size of the micropores in the second group of ceramic sheets 120 is 30-40um, the pore size of the micropores in the third group of ceramic sheets 130 is 20-30um, and the pore size of the micropores in the fourth group of ceramic sheets 140 is 10-20um. In FIG1 , denser shaded oblique lines represent smaller pore sizes, and looser shaded lines represent larger pore sizes.

本实施例中的多片层多孔陶瓷基体，其每层陶瓷片层内微孔的孔隙率为40%-65%，其每层陶瓷片层的厚度为0.5mm。In the multi-layer porous ceramic substrate of the present embodiment, the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.5 mm.

如图2所示，为了制得具有上述参数的多片层多孔陶瓷基体10，本实施例在制造时，多片层多孔陶瓷基体10由4层片状的陶瓷生胚11、12、13、14上下层叠为4组陶瓷生胚并压制成一体后排胶烧结制得，一层所述陶瓷生胚11（或12、13、14）在烧结后构成一层所述陶瓷片层110（或120、130、140）陶瓷生胚11、12、13、14由流延陶瓷浆料通过流延工艺制得，其中，流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中陶瓷粉体的组分按重量份包括骨料35～50份、造孔剂20～30份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。As shown in FIG. 2 , in order to obtain a multi-layer porous ceramic substrate 10 having the above parameters, in the present embodiment, during manufacturing, the multi-layer porous ceramic substrate 10 is made of 4 layers of flaky ceramic green embryos 11, 12, 13, 14 stacked up and down into 4 groups of ceramic green embryos and pressed into one body and then sintered by debinding. A layer of the ceramic green embryo 11 (or 12, 13, 14) forms a layer of the ceramic sheet 110 (or 120, 130, 140) after sintering. The ceramic green embryos 11, 12, 13, 14 are made of tape-cast ceramic slurry through a tape-casting process. The components of the tape-cast ceramic slurry include 40-65 parts of ceramic powder, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder by weight, wherein the components of the ceramic powder include 35-50 parts of aggregate, 20-30 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in different layers of the ceramic green embryos of the same group is the same, and the average particle size of the aggregate and/or pore former contained in different groups of ceramic green embryos is different.

本实施例中陶瓷生胚按自下而上层叠的顺序，第1层陶瓷生胚11中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚12中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚13中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4层陶瓷生胚14中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。In this embodiment, the ceramic green body is stacked from bottom to top. The first layer of ceramic green body 11 contains 40 to 46 parts by weight of aggregate, the average particle size of the aggregate is 70 to 75 μm, the weight of the pore former is 25 to 28 parts, and the average particle size of the pore former is 40 to 50 μm; the second layer of ceramic green body 12 contains 45 to 50 parts by weight of aggregate, the average particle size of the aggregate is 40 to 60 μm, the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 20 to 30 μm. The diameter is 40-50um; the weight parts of aggregate contained in the third layer of ceramic green body 13 are 40-48 parts, the average particle size of aggregate is 15-30um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um; the weight parts of aggregate contained in the fourth layer of ceramic green body 14 are 35-45 parts, the average particle size of aggregate is 10-20um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um.

本实施例中，每一层陶瓷生胚的厚度为0.6mm。In this embodiment, the thickness of each layer of ceramic green body is 0.6 mm.

本实施例中，骨料是形成多片层多孔陶瓷基体的骨架的主材料，由高岭土、硅藻土、氧化铝、氮化硅混合而成。In this embodiment, the aggregate is the main material for forming the skeleton of the multi-layer porous ceramic matrix, and is a mixture of kaolin, diatomaceous earth, alumina, and silicon nitride.

本实施例中，造孔剂是用以烧结时汽化蒸发并在多孔陶瓷基体内形成微孔的材料，由石墨、淀粉、木粉混合而成。In this embodiment, the pore-forming agent is a material that vaporizes and evaporates during sintering to form micropores in the porous ceramic matrix, and is a mixture of graphite, starch, and wood powder.

本实施例中，烧结助剂是用以粘结骨料并有助于在合适的温度下烧结形成多孔陶瓷基体的材料，由氧化硼、硅酸钠、氧化钾混合而成。In this embodiment, the sintering aid is a material used to bond aggregates and help sinter at a suitable temperature to form a porous ceramic matrix, and is a mixture of boron oxide, sodium silicate, and potassium oxide.

本实施例中，粉料分散剂是用以促进骨料均匀分散防止沉淀和积聚的材料，由石蜡、硼酸、聚乙烯混合而成。In this embodiment, the powder dispersant is a material used to promote uniform dispersion of aggregates to prevent precipitation and accumulation, and is a mixture of paraffin, boric acid, and polyethylene.

本实施例中，溶剂是用以把陶瓷粉体转化为流体的材料，由乙醇、异丙醇、丙酮混合而成。In this embodiment, the solvent is a material used to convert ceramic powder into a fluid, and is a mixture of ethanol, isopropanol, and acetone.

本实施例中，浆料分散剂是用以将陶瓷粉体分散在溶剂中的材料，由硼酸、亚麻籽油混合而成。In this embodiment, the slurry dispersant is a material used to disperse ceramic powder in a solvent, and is a mixture of boric acid and linseed oil.

本实施例中，增塑剂是用以提高陶瓷生胚的塑性的材料，由聚乙二醇构成。In this embodiment, the plasticizer is a material used to improve the plasticity of the ceramic green body, and is composed of polyethylene glycol.

本实施例中，粘结剂是用以提高陶瓷生胚的强度的材料，由聚丙烯酸甲酯、乙基纤维素混合而成。In this embodiment, the binder is a material used to improve the strength of the ceramic green body, and is a mixture of polymethyl acrylate and ethyl cellulose.

实施例2：Embodiment 2:

如图3所示，本发明的一种多片层多孔陶瓷基体20，由上下层叠并烧结为一体的4组陶瓷片层构成，该4组陶瓷片层包括第1组陶瓷片层210、第2组陶瓷片层220、第3组陶瓷片层230、第4组陶瓷片层240，每组陶瓷片层由1层陶瓷片层210、或220、或230、或240构成，每层陶瓷片层内均匀分布有泡状的微孔（图中未示），其中，各组的陶瓷片层内的微孔的平均孔径均不同，4组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化的规律，即自第1组陶瓷片层210到第4组陶瓷片层240，各组陶瓷片层内的微孔的平均孔径具有大小交替变化的规律。其中，按自下而上层叠的顺序，第1组陶瓷片层210中微孔的孔径为40～50um，第2组陶瓷片层220中微孔的孔径为30～40um，第3组陶瓷片层230中微孔的孔径为40～50um，第4组陶瓷片层240中微孔的孔径为10～20um。图3中阴影部分斜线较密集代表孔径较小，较疏松代表孔径较大。As shown in FIG3 , a multi-layer porous ceramic substrate 20 of the present invention is composed of four groups of ceramic layers stacked up and down and sintered into one, the four groups of ceramic layers include a first group of ceramic layers 210, a second group of ceramic layers 220, a third group of ceramic layers 230, and a fourth group of ceramic layers 240, each group of ceramic layers is composed of one layer of ceramic layers 210, or 220, or 230, or 240, and each layer of ceramic layers has bubble-shaped micropores (not shown in the figure) evenly distributed therein, wherein the average pore size of the micropores in each group of ceramic layers is different, and the average pore size of the micropores in each group of ceramic layers in the four groups of ceramic layers in a bottom-up order has a regularity of alternating size changes, that is, from the first group of ceramic layers 210 to the fourth group of ceramic layers 240, the average pore size of the micropores in each group of ceramic layers has a regularity of alternating size changes. Among them, in the order of stacking from bottom to top, the pore size of the micropores in the first group of ceramic sheets 210 is 40-50um, the pore size of the micropores in the second group of ceramic sheets 220 is 30-40um, the pore size of the micropores in the third group of ceramic sheets 230 is 40-50um, and the pore size of the micropores in the fourth group of ceramic sheets 240 is 10-20um. In FIG3 , denser shaded oblique lines represent smaller pore sizes, and looser shaded lines represent larger pore sizes.

如图4所示，为了制得具有上述参数的多片层多孔陶瓷基体20，本实施例在制造时，多片层多孔陶瓷基体20由4层片状的陶瓷生胚21、22、23、24上下层叠为4组陶瓷生胚并压制成一体后排胶烧结制得，一层陶瓷生胚21（或22、23、24）在烧结后构成一层陶瓷片层210（或220、230、240），陶瓷生胚由流延陶瓷浆料通过流延工艺制得，其中，流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中陶瓷粉体的组分按重量份包括骨料35～50份、造孔剂20～30份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。As shown in FIG4 , in order to obtain a multi-layer porous ceramic substrate 20 having the above parameters, in the present embodiment, the multi-layer porous ceramic substrate 20 is manufactured by stacking four layers of flaky ceramic green embryos 21, 22, 23, and 24 up and down to form four groups of ceramic green embryos, pressing them into one body, and then debonding and sintering them. A layer of ceramic green embryo 21 (or 22, 23, and 24) forms a layer of ceramic sheet 210 (or 220, 230, and 240) after sintering. The ceramic green embryo is made of a tape-cast ceramic slurry through a tape-casting process, wherein the tape-cast ceramic slurry The components of the material include 40-65 parts of ceramic powder, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder by weight, wherein the components of the ceramic powder include 35-50 parts of aggregate, 20-30 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in different layers of the ceramic green embryos of the same group is the same, and the average particle size of the aggregate and/or pore former contained in different groups of ceramic green embryos is different.

本实施例中，陶瓷生胚按自下而上层叠的顺序，第1层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第4层陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。In this embodiment, the ceramic green body is stacked from bottom to top, and the weight parts of the aggregate contained in the first layer of ceramic green body are 40 to 46 parts, the average particle size of the aggregate is 70 to 75 um, the weight parts of the pore former are 25 to 28 parts, and the average particle size of the pore former is 40 to 50 um; the weight parts of the aggregate contained in the second layer of ceramic green body are 45 to 50 parts, the average particle size of the aggregate is 40 to 60 um, the weight parts of the pore former are 20 to 25 parts, and the average particle size of the pore former is The particle size is 40-50um; the weight of the aggregate contained in the third layer of ceramic green body is 40-46 parts, the average particle size of the aggregate is 70-75um, the weight of the pore former is 25-28 parts, and the average particle size of the pore former is 40-50um; the weight of the aggregate contained in the fourth layer of ceramic green body is 35-45 parts, the average particle size of the aggregate is 10-20um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um.

本实施例中的多片层多孔陶瓷基体，其每层陶瓷片层内微孔的孔隙率为40%-65%，其每层陶瓷片层的厚度为0.5mm。本实施例中，每一层陶瓷生胚的厚度为0.6mm。In the multi-layer porous ceramic substrate of this embodiment, the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.5 mm. In this embodiment, the thickness of each ceramic green body is 0.6 mm.

本实施例的其余技术特征与实施例一基本相同，不再赘述。The remaining technical features of this embodiment are basically the same as those of the first embodiment and will not be described in detail.

实施例3：Embodiment 3:

如图5所示，本实施例的一种多片层多孔陶瓷基体30，由上下层叠并烧结为一体的3组的陶瓷片层310、320、330构成，每组陶瓷片层包括2层的陶瓷片层300，每层陶瓷片层300内均匀分布有泡状的微孔，同组不同层的陶瓷片层内的微孔的平均孔径相同，不同组的陶瓷片层内的微孔的平均孔径不同，其3组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化规律。As shown in Figure 5, a multi-layer porous ceramic substrate 30 of the present embodiment is composed of three groups of ceramic layers 310, 320, and 330 stacked up and down and sintered into one, each group of ceramic layers includes two layers of ceramic layers 300, and each layer of ceramic layers 300 has bubble-shaped micropores evenly distributed therein. The average pore size of the micropores in ceramic layers of different layers in the same group is the same, and the average pore size of the micropores in ceramic layers of different groups is different. The three groups of ceramic layers are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic layers has a gradient change rule from large to small.

即陶瓷片层具有3组，包括第1组陶瓷片层310、第2组陶瓷片层320和第3组陶瓷片层330，每组陶瓷片层具有2层陶瓷片层300，总片层数为6层，其中按自下而上的顺序，第1组陶瓷片层310中微孔的孔径为35～50um，第2组陶瓷片层320中微孔的孔径为20～35um，第3组陶瓷片层330中微孔的孔径为10～20um。图5中阴影部分斜线较密集代表孔径较小，较疏松代表孔径较大。That is, there are three groups of ceramic sheets, including the first group of ceramic sheets 310, the second group of ceramic sheets 320 and the third group of ceramic sheets 330. Each group of ceramic sheets has two layers of ceramic sheets 300, and the total number of sheets is 6. In order from bottom to top, the pore size of the micropores in the first group of ceramic sheets 310 is 35-50um, the pore size of the micropores in the second group of ceramic sheets 320 is 20-35um, and the pore size of the micropores in the third group of ceramic sheets 330 is 10-20um. In FIG. 5, denser shaded oblique lines represent smaller pore sizes, and looser shaded lines represent larger pore sizes.

如图5-图7所示，本实施例的多片层多孔陶瓷基体30，由2层相同的片状的陶瓷生胚3上下层叠为一组陶瓷生胚以及由3组陶瓷生胚31、32、33上下层叠并压制成一体后排胶烧结制得，一层陶瓷生胚3在烧结后构成一层陶瓷片层300，故本实施例的多片层多孔陶瓷基体30具有6层陶瓷片层300。陶瓷生胚3由流延陶瓷浆料通过流延工艺制得，流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中陶瓷粉体的组分按重量份包括骨料35～48份、造孔剂25～30份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。As shown in FIGS. 5-7 , the multi-layer porous ceramic substrate 30 of the present embodiment is formed by stacking two layers of identical lamellar ceramic green embryos 3 into a group of ceramic green embryos and stacking three groups of ceramic green embryos 31, 32, 33 into a whole and then debonding and sintering. A layer of ceramic green embryo 3 constitutes a layer of ceramic sheet 300 after sintering. Therefore, the multi-layer porous ceramic substrate 30 of the present embodiment has six layers of ceramic sheets 300. The ceramic green body 3 is made of a tape-cast ceramic slurry through a tape-casting process. The components of the tape-cast ceramic slurry include 40 to 65 parts of ceramic powder, 30 to 50 parts of solvent, 0.1 to 3 parts of slurry dispersant, 1 to 8 parts of plasticizer and 1 to 10 parts of binder by weight, wherein the components of the ceramic powder include 35 to 48 parts of aggregate, 25 to 30 parts of pore former, 5 to 19 parts of sintering aid and 5 to 35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different.

其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为60～75um，造孔剂的重量份为25～30份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～50um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第3组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。Among them, in the order of stacking from bottom to top, the weight parts of aggregate contained in the first group of ceramic green embryos are 40-46 parts, the average particle size of aggregate is 60-75um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 40-50um; the weight parts of aggregate contained in the second group of ceramic green embryos are 40-48 parts, the average particle size of aggregate is 15-50um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um; the weight parts of aggregate contained in the third group of ceramic green embryos are 35-45 parts, the average particle size of aggregate is 10-20um, the weight parts of pore former are 25-30 parts, and the average particle size of pore former is 35-40um.

本实施例中的多片层多孔陶瓷基体，其每层陶瓷片层内微孔的孔隙率为40%-65%，其每层陶瓷片层的厚度为0.35mm。本实施例中，每一层陶瓷生胚的厚度为0.4mm。In the multi-layer porous ceramic substrate of this embodiment, the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.35mm. In this embodiment, the thickness of each ceramic green body is 0.4mm.

本实施例的其余技术特征与实施例一基本相同，不再赘述。The remaining technical features of this embodiment are basically the same as those of the first embodiment and will not be described in detail.

实施例4：Embodiment 4:

如图8所示，本实施例的一种多片层多孔陶瓷基体40，由上下层叠并烧结为一体的4组的陶瓷片层410、420、430、440构成，每组陶瓷片层包括2层的陶瓷片层400，每层陶瓷片层400内均匀分布有泡状的微孔，同组的陶瓷片层内的微孔的平均孔径相同，不同组的陶瓷片层内的微孔的平均孔径不同，其4组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化规律。As shown in Figure 8, a multi-layer porous ceramic substrate 40 of the present embodiment is composed of four groups of ceramic layers 410, 420, 430, and 440 stacked up and down and sintered into one, each group of ceramic layers includes two layers of ceramic layers 400, and each layer of ceramic layers 400 has bubble-shaped micropores evenly distributed therein. The average pore size of the micropores in the same group of ceramic layers is the same, and the average pore size of the micropores in different groups of ceramic layers is different. The four groups of ceramic layers are arranged in a bottom-up order, and the average pore size of the micropores in each group of ceramic layers has a gradient change rule from large to small.

即本发明的多片层多孔陶瓷基体40具有4组陶瓷片层，包括第1组陶瓷片层410、第2组陶瓷片层420、第3组陶瓷片层430和第4组陶瓷片层430，每组陶瓷片层具有2层陶瓷片层400，总片层数为8层，其中按自下而上的顺序，第1组陶瓷片层410中微孔的孔径为40～50um，第2组陶瓷片层420中微孔的孔径为30～40um，第3组陶瓷片层430中微孔的孔径为20～30um，第4组陶瓷片层440中微孔的孔径为10～20um。图8中阴影部分斜线较密集代表孔径较小，较疏松代表孔径较大。That is, the multi-layer porous ceramic substrate 40 of the present invention has 4 groups of ceramic layers, including the first group of ceramic layers 410, the second group of ceramic layers 420, the third group of ceramic layers 430 and the fourth group of ceramic layers 440, each group of ceramic layers has 2 layers of ceramic layers 400, and the total number of layers is 8, wherein, in order from bottom to top, the pore size of the micropores in the first group of ceramic layers 410 is 40-50um, the pore size of the micropores in the second group of ceramic layers 420 is 30-40um, the pore size of the micropores in the third group of ceramic layers 430 is 20-30um, and the pore size of the micropores in the fourth group of ceramic layers 440 is 10-20um. In FIG8, denser shaded oblique lines represent smaller pore sizes, and looser shaded lines represent larger pore sizes.

如图9所示，本实施例的多片层多孔陶瓷基体40，由2层相同的片状的陶瓷生胚4上下层叠为一组陶瓷生胚以及由4组陶瓷生胚41、42、43、44上下层叠并压制成一体后排胶烧结制得，一层陶瓷生胚4在烧结后构成一层陶瓷片层400，陶瓷生胚4由流延陶瓷浆料通过流延工艺制得，流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中陶瓷粉体的组分按重量份包括骨料35～48份、造孔剂25～30份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。As shown in FIG9 , the multi-layer porous ceramic substrate 40 of the present embodiment is formed by stacking two layers of identical flaky ceramic green embryos 4 up and down to form a group of ceramic green embryos, and by stacking four groups of ceramic green embryos 41, 42, 43, 44 up and down and pressing them into one body and then sintering them after debinding. A layer of ceramic green embryo 4 forms a layer of ceramic sheet 400 after sintering. The ceramic green embryo 4 is formed by a tape-casting ceramic slurry through a tape-casting process. The components of the tape-casting ceramic slurry include 40 to 65 parts by weight of ceramic powder. parts, 30-50 parts of solvent, 0.1-3 parts of slurry dispersant, 1-8 parts of plasticizer and 1-10 parts of binder, wherein the components of the ceramic powder include 35-48 parts of aggregate, 25-30 parts of pore former, 5-19 parts of sintering aid and 5-35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and the pore former contained in the ceramic green bodies of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in the ceramic green bodies of different groups is different.

其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。In the order of stacking from bottom to top, the first group of ceramic green bodies contains 40 to 46 parts by weight of aggregate, the average particle size of the aggregate is 70 to 75 um, the weight of the pore former is 25 to 28 parts, and the average particle size of the pore former is 40 to 50 um; the second group of ceramic green bodies contains 45 to 50 parts by weight of aggregate, the average particle size of the aggregate is 40 to 60 um, the weight of the pore former is 20 to 25 parts, and the average particle size of the pore former is 4 0～50um; the weight parts of aggregate contained in the third group of ceramic green embryos are 40～48 parts, the average particle size of aggregate is 15～30um, the weight parts of pore former are 25～30 parts, and the average particle size of pore former is 35～40um; the weight parts of aggregate contained in the fourth group of ceramic green embryos are 35～45 parts, the average particle size of aggregate is 10～20um, the weight parts of pore former are 25～30 parts, and the average particle size of pore former is 35～40um.

本实施例中的多片层多孔陶瓷基体，其每层陶瓷片层内微孔的孔隙率为40%-65%，其每层陶瓷片层的厚度为0.25mm。本实施例中，每一层陶瓷生胚的厚度为0.3mm。In the multi-layer porous ceramic substrate of this embodiment, the porosity of micropores in each ceramic layer is 40%-65%, and the thickness of each ceramic layer is 0.25 mm. In this embodiment, the thickness of each ceramic green body is 0.3 mm.

本实施例的其余技术特征与实施例一基本相同，不再赘述。The remaining technical features of this embodiment are basically the same as those of the first embodiment and will not be described in detail.

实施例5：Embodiment 5:

如图10、图11所示，本实施例提供一种多片层多孔陶瓷雾化芯，其中包括的多片层多孔陶瓷基体50，可用作雾化芯的导液体。首先在上述实施例的多片层多孔陶瓷基体50的基础上，在多片层多孔陶瓷基体的上下两面中选择其中一面作为雾化面51，另一面作为导液面52，在雾化面51的两端设有电极层53，该电极层通过丝网印刷的方式将金属浆料印刷在雾化面51的两端并经过烧结得到电极层53，雾化面51上还设有一层金属发热层54，该金属发热层54通过金属溅射镀膜的工艺或通过丝网印刷另一金属浆料后烧结的工艺制得，金属发热层54与电极层53电连接。多片层多孔陶瓷基体的上下两面均可用作导液面用于导入液态物质，而另一面用作雾化面用于渗出液体物质，金属发热层54也具有微孔或大的通孔，以便雾化面51渗出的液态物质通过金属发热层继续渗出，或供气态物质挥发至空气中，在金属发热层54通电工作时，其可将雾化面51渗出的液态物质进行加热、蒸发或雾化，形成气溶胶或气雾、烟雾，电极层53用于连接电源的两极，为金属发热层54提供电能。As shown in Figures 10 and 11, this embodiment provides a multi-layer porous ceramic atomization core, which includes a multi-layer porous ceramic substrate 50, which can be used as a liquid-conducting surface of the atomization core. First, on the basis of the multi-layer porous ceramic substrate 50 of the above embodiment, one of the upper and lower surfaces of the multi-layer porous ceramic substrate is selected as the atomization surface 51, and the other surface is used as the liquid-conducting surface 52. Electrode layers 53 are provided at both ends of the atomization surface 51. The electrode layer is printed by screen printing a metal slurry on both ends of the atomization surface 51 and sintered to obtain the electrode layer 53. A metal heating layer 54 is also provided on the atomization surface 51. The metal heating layer 54 is obtained by a metal sputtering coating process or by screen printing another metal slurry and then sintering. The metal heating layer 54 is electrically connected to the electrode layer 53. Both the upper and lower surfaces of the multi-layer porous ceramic matrix can be used as liquid guiding surfaces for introducing liquid substances, and the other surface is used as an atomizing surface for seeping out liquid substances. The metal heating layer 54 also has micropores or large through holes, so that the liquid substance seeping out of the atomizing surface 51 can continue to seep out through the metal heating layer, or provide gaseous substances for volatilization into the air. When the metal heating layer 54 is energized and working, it can heat, evaporate or atomize the liquid substance seeping out of the atomizing surface 51 to form an aerosol or aerosol, or smoke. The electrode layer 53 is used to connect the two poles of a power supply to provide electrical energy to the metal heating layer 54.

说明书附图中图10所示为本实施例的多片层多孔陶瓷雾化芯正置立体分解图，图11所示为本实施例的多片层多孔陶瓷雾化芯倒置立体分解图，其实际使用中，本发明的多片层多孔陶瓷雾化芯一般设为图11所示的位置安装，以便雾化液可依靠重力从上至下流动传导至金属发热层。图10所示位置是为了便于展示分解结构中的电极层、金属发热层。Figure 10 of the attached drawings of the specification shows an upright three-dimensional exploded view of the multi-layer porous ceramic atomizer core of this embodiment, and Figure 11 shows an inverted three-dimensional exploded view of the multi-layer porous ceramic atomizer core of this embodiment. In actual use, the multi-layer porous ceramic atomizer core of the present invention is generally installed in the position shown in Figure 11, so that the atomized liquid can flow from top to bottom by gravity and conduct to the metal heating layer. The position shown in Figure 10 is for the convenience of showing the electrode layer and the metal heating layer in the decomposed structure.

本发明的多片层多孔陶瓷雾化芯，其作为导液体的多片层多孔陶瓷基体50中，每层陶瓷片层内均匀分布有泡状的微孔，同组的陶瓷片层内的微孔的平均孔径相同，而不同组的陶瓷片层内的微孔的平均孔径不同，各组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化或由大到小梯度变化的规律。微孔是圆球形或近似圆球形泡状的微孔，微孔与微孔之间的距离较近，部分相邻的微孔之间具有微小的通孔而构成连通，故整个多片层多孔陶瓷基体可作为导液体，用于将液态物质从其中的一面吸入而经过微孔的吸附、渗透、流动后传导至另一面渗出。本发明的多片层多孔陶瓷雾化芯的导液体，具有前述的微孔的孔径以及陶瓷片层的厚度结构，使得多片层多孔陶瓷基体在外力如吸力作用下具有传导液态物质的良好导通能力，又不至于流通太快，具有一定的平衡能力，在无外力如吸力作用时，微孔具有一定张力，这样可迅速吸附液态物质而又不至于自然流动而渗出造成滴漏。本发明的多片层多孔陶瓷雾化芯，可用于电子烟雾化器，用于加热蒸发、雾化电子烟储液腔内的雾化液或电子烟烟液。The multi-layer porous ceramic atomization core of the present invention, in which the multi-layer porous ceramic matrix 50 as a liquid conductor, has bubble-shaped micropores evenly distributed in each ceramic layer, the average pore size of the micropores in the same group of ceramic layers is the same, and the average pore size of the micropores in different groups of ceramic layers is different. The average pore size of the micropores in each group of ceramic layers in a bottom-up order has a rule of alternating size or gradient change from large to small. The micropores are spherical or nearly spherical bubble-shaped micropores, the distance between the micropores is relatively close, and some adjacent micropores are connected by tiny through holes, so the entire multi-layer porous ceramic matrix can be used as a liquid conductor, which is used to absorb liquid substances from one side and conduct them to the other side for seepage after adsorption, penetration, and flow of the micropores. The liquid-conducting liquid of the multi-layer porous ceramic atomizing core of the present invention has the aforementioned micropore pore size and the thickness structure of the ceramic layer, so that the multi-layer porous ceramic matrix has a good conduction ability to conduct liquid substances under the action of external forces such as suction, and does not flow too fast, and has a certain balance ability. When there is no external force such as suction, the micropores have a certain tension, so that the liquid substance can be quickly absorbed without flowing naturally and seeping out to cause dripping. The multi-layer porous ceramic atomizing core of the present invention can be used in an electronic cigarette atomizer, and is used to heat, evaporate, and atomize the atomized liquid or electronic cigarette liquid in the electronic cigarette storage chamber.

本发明采用流延工艺制备多组多片具有连续不同粒径结构的陶瓷生胚，并将多片陶瓷生胚进行层叠压片并烧制得到具有多片层不同孔径的多孔陶瓷基体，特别是可以形成具有梯度孔径结构的多片层多孔陶瓷基体。陶瓷生胚采用多层叠压方式成型，与一次成型工艺相比，多层陶瓷生胚压制烧结后在微观下会产生层间界面，层间界面的微孔孔径介于两层微孔孔径之间，对于雾化液的传送具有一定的过渡和缓冲作用，有利于雾化液的存储与传输。此外多层陶瓷片层进行层叠方式可以制备具有梯度孔径结构的多孔陶瓷，在应用到电子烟的雾化芯时，可以根据不同发热方式、不同粘度的烟液对陶瓷孔径结构按陶瓷片层进行梯度调整，从导液面到雾化面的孔隙率、孔径逐层调节，使得多孔陶瓷基体的供液与雾化达到平衡，实现兼具导液快与雾化细腻的优点，提升雾化体验。The present invention adopts a tape casting process to prepare multiple groups of ceramic green embryos with continuous different particle size structures, and stacks and presses multiple ceramic green embryos and fires them to obtain a porous ceramic matrix with multiple layers of different pore sizes, especially a multi-layer porous ceramic matrix with a gradient pore size structure. The ceramic green embryo is formed by a multi-layer stacking method. Compared with a one-time forming process, a multi-layer ceramic green embryo will produce an interlayer interface under a microscopic level after pressing and sintering. The micropore aperture of the interlayer interface is between the micropore apertures of the two layers, which has a certain transition and buffering effect on the transmission of the atomized liquid, and is conducive to the storage and transmission of the atomized liquid. In addition, a multi-layer ceramic layer can be stacked to prepare a porous ceramic with a gradient pore size structure. When applied to the atomization core of an electronic cigarette, the ceramic pore size structure can be adjusted by a gradient according to the ceramic layer according to different heating methods and different viscosities of the smoke liquid. The porosity and pore size from the liquid guide surface to the atomization surface are adjusted layer by layer, so that the liquid supply and atomization of the porous ceramic matrix are balanced, and the advantages of fast liquid guide and delicate atomization are achieved, and the atomization experience is improved.

实施例6：Embodiment 6:

如图9、图10所示，本发明的多片层多孔陶瓷雾化芯，首先在上述实施例的多片层多孔陶瓷基体50的基础上，在多片层多孔陶瓷基体的上下两面中选择微孔的孔径较小的一面设为雾化面51，另一面设为导液面52，在雾化面51的两端设有电极层53，该电极层通过丝网印刷的方式将金属浆料印刷在雾化面51的两端并经过烧结得到电极层53，雾化面51上还设有一层金属发热层54，该金属发热层54通过金属溅射镀膜的工艺或通过丝网印刷另一金属浆料后烧结的工艺制得。本实施例中，选择微孔的孔径较小的一面设为雾化面51，另一面设为导液面52，使得雾化液更容易被导液面吸收，而到达雾化面的那一层时，由于较小的微孔孔径，其雾化液的渗出速度得以控制，使得供液与雾化的速度相匹配以便更好地达到一个动态平衡，实现兼具导液快与雾化细腻的优点，提升电子烟雾化器用户的雾化体验。As shown in Figures 9 and 10, the multi-layer porous ceramic atomization core of the present invention is firstly based on the multi-layer porous ceramic substrate 50 of the above-mentioned embodiment, and the side with smaller pore size of the micropores is selected from the upper and lower surfaces of the multi-layer porous ceramic substrate to be set as the atomization surface 51, and the other side is set as the liquid guide surface 52, and electrode layers 53 are provided at both ends of the atomization surface 51, and the electrode layers 53 are obtained by printing metal slurry on both ends of the atomization surface 51 by screen printing and sintering, and a metal heating layer 54 is also provided on the atomization surface 51, and the metal heating layer 54 is obtained by a metal sputtering coating process or by a process of screen printing another metal slurry and then sintering. In the present embodiment, the side with a smaller pore size of the micropores is selected as the atomizing surface 51, and the other side is selected as the liquid guiding surface 52, so that the atomized liquid is more easily absorbed by the liquid guiding surface. When reaching the atomizing surface, due to the smaller pore size of the micropores, the seepage speed of the atomized liquid can be controlled, so that the liquid supply and atomization speeds are matched to better achieve a dynamic balance, thereby achieving the advantages of both fast liquid guiding and fine atomization, and improving the atomization experience of electronic cigarette atomizer users.

工业实用性Industrial Applicability

以上所述仅为本发明的较佳实施例，凡依本发明权利要求范围所做的均等变化与修饰，皆应属本发明权利要求的涵盖范围。The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims (31)

一种多片层多孔陶瓷基体，其特征在于，由上下层叠并烧结为一体的若干组陶瓷片层构成，每组所述陶瓷片层包括1～若干层的陶瓷片层，每层所述陶瓷片层内均匀分布有泡状的微孔，同组不同层的所述陶瓷片层内的微孔的平均孔径相同，不同组的所述陶瓷片层内的微孔的平均孔径不同，所述若干组陶瓷片层按自下而上的顺序，各组陶瓷片层内的微孔的平均孔径具有大小交替变化或由大到小梯度变化的规律。A multi-layer porous ceramic matrix, characterized in that it is composed of several groups of ceramic sheets stacked up and down and sintered into one, each group of ceramic sheets includes 1 to several layers of ceramic sheets, each layer of the ceramic sheets has bubble-shaped micropores evenly distributed, the average pore size of the micropores in the ceramic sheets of different layers in the same group is the same, and the average pore size of the micropores in the ceramic sheets of different groups is different, and the average pore size of the micropores in each group of ceramic sheets in a bottom-up order has a rule of alternating size or gradient change from large to small. 根据权利要求1所述的多片层多孔陶瓷基体，其特征在于，由1～若干层片状的陶瓷生胚上下层叠为一组陶瓷生胚以及若干组所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，所述陶瓷生胚由流延陶瓷浆料通过流延工艺制得，所述流延陶瓷浆料的组分按重量份包括陶瓷粉体40～65份、溶剂30～50份、浆料分散剂0.1～3份、增塑剂1～8份和粘结剂1～10份，其中所述陶瓷粉体的组分按重量份包括骨料25～55份、造孔剂5～40份、烧结助剂5～19份和粉料分散剂5～35份，其中同组不同层的陶瓷生胚中所含的骨料和造孔剂的平均粒径相同，不同组陶瓷生胚中所含的骨料和\或造孔剂的平均粒径各不相同。The multi-layer porous ceramic matrix according to claim 1 is characterized in that it is formed by stacking 1 to several layers of flaky ceramic green embryos up and down to form a group of ceramic green embryos and several groups of said ceramic green embryos up and down and pressing them into one body and then debinding and sintering them, and a layer of said ceramic green embryo constitutes a layer of said ceramic sheet after sintering, and said ceramic green embryo is made by tape-casting ceramic slurry through a tape-casting process, and the components of said tape-casting ceramic slurry include 40 to 65 parts of ceramic powder, 30 to 50 parts of solvent, 0.1 to 3 parts of slurry dispersant, 1 to 8 parts of plasticizer and 1 to 10 parts of binder by weight, wherein the components of said ceramic powder include 25 to 55 parts of aggregate, 5 to 40 parts of pore former, 5 to 19 parts of sintering aid and 5 to 35 parts of powder dispersant by weight, wherein the average particle size of the aggregate and pore former contained in the ceramic green embryos of different layers in the same group is the same, and the average particle size of the aggregate and/or pore former contained in different groups of ceramic green embryos is different. 根据权利要求1所述的多片层多孔陶瓷基体，其特征在于，所述微孔的平均孔径为10～50um，或15～45um，或20～40um。The multi-layer porous ceramic substrate according to claim 1 is characterized in that the average pore size of the micropores is 10 to 50 um, or 15 to 45 um, or 20 to 40 um. 根据权利要求1所述的多片层多孔陶瓷基体，其特征在于，所述微孔的孔隙率为40%-65%，或45-60%，或48-56%。The multi-layer porous ceramic matrix according to claim 1 is characterized in that the porosity of the micropores is 40%-65%, or 45-60%, or 48-56%. 根据权利要求1所述的多片层多孔陶瓷基体，其特征在于，每层所述陶瓷片层的厚度为0.1～0.5mm，或0.1～0.25mm、或0.2～0.4mm、或0.25～0.5mm。The multi-layer porous ceramic substrate according to claim 1 is characterized in that the thickness of each ceramic layer is 0.1 to 0.5 mm, or 0.1 to 0.25 mm, or 0.2 to 0.4 mm, or 0.25 to 0.5 mm. 根据权利要求1所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有2～10组，每组所述陶瓷片层具有1～3层陶瓷片层。The multi-layer porous ceramic substrate according to claim 1 is characterized in that the ceramic layers have 2 to 10 groups, and each group of the ceramic layers has 1 to 3 ceramic layers. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有2～5组，每组所述陶瓷片层具有1～2层陶瓷片层。The multi-layer porous ceramic substrate according to claim 2 is characterized in that the ceramic layers have 2 to 5 groups, and each group of the ceramic layers has 1 to 2 ceramic layers. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有3组或4组，每组所述陶瓷片层具有1～2层陶瓷片层。The multi-layer porous ceramic substrate according to claim 2 is characterized in that the ceramic layers have 3 or 4 groups, and each group of the ceramic layers has 1 to 2 ceramic layers. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷生胚的组分按重量份包括所述陶瓷粉体45～55份，溶剂35～45份，浆料分散剂0.1～1份，增塑剂1～5份，粘结剂3～8份。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the components of the ceramic green body include 45 to 55 parts of the ceramic powder, 35 to 45 parts of solvent, 0.1 to 1 part of slurry dispersant, 1 to 5 parts of plasticizer, and 3 to 8 parts of binder in parts by weight. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷粉体的组分按重量份包括所述骨料35～55份，造孔剂25～30份，烧结助剂15～19份，粉料分散剂5～10份。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the components of the ceramic powder include 35 to 55 parts of the aggregate, 25 to 30 parts of the pore former, 15 to 19 parts of the sintering aid, and 5 to 10 parts of the powder dispersant in parts by weight. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述骨料的平均粒径为5～100um，或5～50um，或10～30um。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the average particle size of the aggregate is 5 to 100 um, or 5 to 50 um, or 10 to 30 um. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述造孔剂的平均粒径为5～100um，或15～80um，或25～60um。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the average particle size of the pore-forming agent is 5 to 100 um, or 15 to 80 um, or 25 to 60 um. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，每一层所述陶瓷生胚的厚度为0.1～0.6mm，或0.1～0.3mm，或0.25～0.45mm，或0.3～0.6mm。The multi-layer porous ceramic substrate according to claim 2 is characterized in that the thickness of each layer of the ceramic green body is 0.1 to 0.6 mm, or 0.1 to 0.3 mm, or 0.25 to 0.45 mm, or 0.3 to 0.6 mm. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述骨料是形成多片层多孔陶瓷基体的骨架的主材料，包括高岭土、硅藻土、氧化铝、氮化硅、碳化硅、石英砂、玻璃砂，黏土，长石粉、融石英、堇青石、莫来石中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the aggregate is the main material forming the skeleton of the multi-layer porous ceramic matrix, including at least one of kaolin, diatomaceous earth, alumina, silicon nitride, silicon carbide, quartz sand, glass sand, clay, feldspar powder, fused quartz, cordierite, and mullite. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述造孔剂是用以烧结时汽化蒸发并在多孔陶瓷基体内形成微孔的材料，包括石墨、淀粉、木粉、面粉、豆粉、聚苯乙烯微球、聚甲基丙烯酸甲酯微球、蔗糖、纤维中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the pore-forming agent is a material that vaporizes and evaporates during sintering to form micropores in the porous ceramic matrix, including at least one of graphite, starch, wood powder, flour, soybean powder, polystyrene microspheres, polymethyl methacrylate microspheres, sucrose, and fiber. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述烧结助剂是用以粘结骨料并有助于在合适的温度下烧结形成多孔陶瓷基体的材料，包括氧化硼、硅酸钠、氧化硅、氧化钾、氧化锂、氧化钡、氧化镁、氧化钙、氧化铁、氧化钛、氧化锌、氧化锆中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the sintering aid is a material used to bond aggregates and help sinter at a suitable temperature to form a porous ceramic matrix, including at least one of boron oxide, sodium silicate, silicon oxide, potassium oxide, lithium oxide, barium oxide, magnesium oxide, calcium oxide, iron oxide, titanium oxide, zinc oxide, and zirconium oxide. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述粉料分散剂是用以促进骨料均匀分散防止沉淀和积聚的材料，包括石蜡、蜂蜡、硼酸、油酸、硬脂酸、聚乙烯、聚丙烯、聚乙酸乙烯酯、聚乙烯醇缩醛、乙烯-乙酸酸乙烯共聚树脂、氯乙烯-乙酸乙烯共聚树脂、过氯乙烯树脂、聚丙烯酸酯、聚酰胺中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the powder dispersant is a material used to promote uniform dispersion of aggregates to prevent precipitation and accumulation, including at least one of paraffin, beeswax, boric acid, oleic acid, stearic acid, polyethylene, polypropylene, polyvinyl acetate, polyvinyl acetal, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, perchlorethylene resin, polyacrylate, and polyamide. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述溶剂是用以把陶瓷粉体转化为流体的材料，包括乙醇、异丙醇、丙酮、丁酮、二甲苯、三氯乙烯、乙酸乙酯、乙酸丁酯中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the solvent is a material used to convert ceramic powder into a fluid, including at least one of ethanol, isopropanol, acetone, butanone, xylene, trichloroethylene, ethyl acetate, and butyl acetate. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述浆料分散剂是用以将陶瓷粉体分散在所述溶剂中的材料，包括油酸、硼酸、亚麻籽油、蓖麻油、硬脂酸、三油酸甘油酯中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the slurry dispersant is a material used to disperse the ceramic powder in the solvent, including at least one of oleic acid, boric acid, linseed oil, castor oil, stearic acid, and triolein. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述增塑剂是用以提高陶瓷生胚的塑性的材料，包括聚乙二醇、邻苯二甲酸二丁酯中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the plasticizer is a material used to improve the plasticity of the ceramic green body, including at least one of polyethylene glycol and dibutyl phthalate. 根据权利要求2所述的多片层多孔陶瓷基体，其特征在于，所述粘结剂是用以提高陶瓷生胚的强度的材料，包括聚丙烯酸甲酯、乙基纤维素、聚乙烯、聚乙烯醇缩丁醛、聚异丁烯中的至少一种。The multi-layer porous ceramic matrix according to claim 2 is characterized in that the binder is a material used to improve the strength of the ceramic green body, including at least one of polymethyl acrylate, ethyl cellulose, polyethylene, polyvinyl butyral, and polyisobutylene. 根据权利要求8所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有4组，每组所述陶瓷片层具有1层陶瓷片层，其中按自下而上层叠的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1层陶瓷片层中微孔的孔径为40～50um，第2层陶瓷片层中微孔的孔径为30～40um，第3层陶瓷片层中微孔的孔径为20～30um，第4层陶瓷片层中微孔的孔径为10～20um。The multi-layer porous ceramic matrix according to claim 8 is characterized in that the ceramic layers have 4 groups, each group of the ceramic layers has 1 ceramic layer, wherein in the order of stacking from bottom to top, the average pore size of the micropores in each layer of ceramic layers has a gradient change from large to small, the pore size of the micropores in the first layer of ceramic layers is 40 to 50 um, the pore size of the micropores in the second layer of ceramic layers is 30 to 40 um, the pore size of the micropores in the third layer of ceramic layers is 20 to 30 um, and the pore size of the micropores in the fourth layer of ceramic layers is 10 to 20 um. 根据权利要求22所述的多片层多孔陶瓷基体，其特征在于，由4层所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4层陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。The multi-layer porous ceramic substrate according to claim 22 is characterized in that it is made by stacking 4 layers of the ceramic green embryos up and down and pressing them into one body and then debinding and sintering them. A layer of the ceramic green embryos constitutes a layer of the ceramic sheet after sintering, wherein in the order of stacking from bottom to top, the first layer of the ceramic green embryo contains 40 to 46 parts by weight of aggregate, the average particle size of the aggregate is 70 to 75 um, the weight of the pore-forming agent is 25 to 28 parts, and the average particle size of the pore-forming agent is 40 to 50 um; the second layer of the ceramic green embryo contains 45 to 50 parts by weight of aggregate, the average particle size of the aggregate is 70 to 75 um, the weight of the pore-forming agent is 25 to 28 parts, and the average particle size of the pore-forming agent is 40 to 50 um. The average particle size is 40-60um, the weight of the pore former is 20-25 parts, and the average particle size of the pore former is 40-50um; the weight of the aggregate contained in the third layer of ceramic green body is 40-48 parts, the average particle size of the aggregate is 15-30um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um; the weight of the aggregate contained in the fourth layer of ceramic green body is 35-45 parts, the average particle size of the aggregate is 10-20um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um. 根据权利要求8所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有4组，每组所述陶瓷片层具有1层陶瓷片层，其中按自下而上层叠的顺序，各层陶瓷片层内的微孔的平均孔径具有大小交替变化的规律，第1层陶瓷片层中微孔的孔径为40～50um，第2层陶瓷片层中微孔的孔径为30～40um，第3层陶瓷片层中微孔的孔径为40～50um，第4层陶瓷片层中微孔的孔径为10～20um。The multi-layer porous ceramic substrate according to claim 8 is characterized in that the ceramic layers have 4 groups, each group of the ceramic layers has 1 ceramic layer, wherein in the order of stacking from bottom to top, the average pore size of the micropores in each layer of ceramic layers has a regularity of alternating size, the pore size of the micropores in the first layer of ceramic layers is 40-50um, the pore size of the micropores in the second layer of ceramic layers is 30-40um, the pore size of the micropores in the third layer of ceramic layers is 40-50um, and the pore size of the micropores in the fourth layer of ceramic layers is 10-20um. 根据权利要求24所述的多片层多孔陶瓷基体，其特征在于，由4层所述陶瓷生胚上下层叠并压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2层陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3层陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第4层陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。The multi-layer porous ceramic substrate according to claim 24 is characterized in that it is made by stacking 4 layers of the ceramic green embryos up and down and pressing them into one body and then debinding and sintering them. A layer of the ceramic green embryos constitutes a layer of the ceramic sheet after sintering, wherein in the order of stacking from bottom to top, the weight parts of aggregate contained in the first layer of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregate is 70 to 75 um, the weight parts of the pore-forming agent are 25 to 28 parts, and the average particle size of the pore-forming agent is 40 to 50 um; the weight parts of aggregate contained in the second layer of ceramic green embryos are 45 to 50 parts, the weight parts of aggregate are 25 to 28 parts, and the average particle size of the pore-forming agent is 40 to 50 um. The average particle size is 40-60um, the weight of the pore former is 20-25 parts, and the average particle size of the pore former is 40-50um; the weight of the aggregate contained in the third layer of ceramic green body is 40-46 parts, the average particle size of the aggregate is 70-75um, the weight of the pore former is 25-28 parts, and the average particle size of the pore former is 40-50um; the weight of the aggregate contained in the fourth layer of ceramic green body is 35-45 parts, the average particle size of the aggregate is 10-20um, the weight of the pore former is 25-30 parts, and the average particle size of the pore former is 35-40um. 根据权利要求8所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有3组，每组所述陶瓷片层具有2层陶瓷片层，总片层数为6层，其中按自下而上的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1组陶瓷片层中微孔的孔径为35～50um，第2组陶瓷片层中微孔的孔径为20～35um，第3组陶瓷片层中微孔的孔径为10～20um。The multi-layer porous ceramic substrate according to claim 8 is characterized in that the ceramic layers have 3 groups, each group of the ceramic layers has 2 ceramic layers, and the total number of layers is 6, wherein the average pore size of the micropores in each layer of the ceramic layers has a gradient change from large to small in order from bottom to top, the pore size of the micropores in the first group of ceramic layers is 35 to 50 um, the pore size of the micropores in the second group of ceramic layers is 20 to 35 um, and the pore size of the micropores in the third group of ceramic layers is 10 to 20 um. 根据权利要求26所述多片层多孔陶瓷基体的制备方法，其特征在于，由2层同样的陶瓷生胚上下层叠为1组陶瓷生胚并由3组不同的所述陶瓷生胚上下层叠压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为60～75um，造孔剂的重量份为25～30份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～50um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第3组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。The method for preparing a multi-layer porous ceramic substrate according to claim 26 is characterized in that two layers of the same ceramic green embryos are stacked up and down to form a group of ceramic green embryos, and three groups of different ceramic green embryos are stacked up and down to form a whole and then sintered to remove the binder, and a layer of the ceramic green embryo constitutes a layer of the ceramic sheet after sintering, wherein in the order of stacking from bottom to top, the weight parts of the aggregate contained in the first group of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregate is 60 to 75 um, and the weight parts of the pore-forming agent are 2 The weight parts of the aggregate in the second group of ceramic green bodies are 40-48 parts, the average particle size of the aggregate is 15-50um, the weight parts of the pore former are 25-30 parts, and the average particle size of the pore former is 35-40um; the weight parts of the aggregate in the third group of ceramic green bodies are 35-45 parts, the average particle size of the aggregate is 10-20um, the weight parts of the pore former are 25-30 parts, and the average particle size of the pore former is 35-40um. 根据权利要求8所述的多片层多孔陶瓷基体，其特征在于，所述陶瓷片层具有4组，每组所述陶瓷片层具有2层陶瓷片层，总片层数为8层，其中按自下而上的顺序，各层陶瓷片层内的微孔的平均孔径具有由大到小的梯度变化的规律，第1组陶瓷片层中微孔的孔径为40～50um，第2组陶瓷片层中微孔的孔径为30～40um，第3组陶瓷片层中微孔的孔径为20～30um，第4组陶瓷片层中微孔的孔径为10～20um。The multi-layer porous ceramic substrate according to claim 8 is characterized in that the ceramic layers have 4 groups, each group of the ceramic layers has 2 ceramic layers, and the total number of layers is 8, wherein the average pore size of the micropores in each layer of the ceramic layers has a gradient change from large to small in order from bottom to top, the pore size of the micropores in the first group of ceramic layers is 40 to 50 um, the pore size of the micropores in the second group of ceramic layers is 30 to 40 um, the pore size of the micropores in the third group of ceramic layers is 20 to 30 um, and the pore size of the micropores in the fourth group of ceramic layers is 10 to 20 um. 根据权利要求28所述多片层多孔陶瓷基体的制备方法，其特征在于，由2层同样的陶瓷生胚上下层叠为1组陶瓷生胚并由4组不同的所述陶瓷生胚压制成一体后排胶烧结制得，一层所述陶瓷生胚在烧结后构成一层所述陶瓷片层，所述陶瓷生胚由流延陶瓷浆料通过流延工艺制得，其中按自下而上层叠的顺序，第1组陶瓷生胚中含有的骨料的重量份为40～46份，骨料平均粒径为70～75um，造孔剂的重量份为25～28份，造孔剂的平均粒径为40～50um；第2组陶瓷生胚中含有的骨料的重量份为45～50份，骨料平均粒径为40～60um，造孔剂的重量份为20～25份，造孔剂的平均粒径为40～50um；第3组陶瓷生胚中含有的骨料的重量份为40～48份，骨料平均粒径为15～30um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um；第4组陶瓷生胚中含有的骨料的重量份为35～45份，骨料平均粒径为10～20um，造孔剂的重量份为25～30份，造孔剂的平均粒径为35～40um。The method for preparing a multi-layer porous ceramic substrate according to claim 28 is characterized in that two layers of the same ceramic green embryos are stacked up and down to form a group of ceramic green embryos, and four groups of different ceramic green embryos are pressed into one body and then sintered to remove the binder, and one layer of the ceramic green embryo constitutes a layer of the ceramic sheet after sintering, and the ceramic green embryo is made by a tape-casting process of a tape-cast ceramic slurry, wherein in the order of stacking from bottom to top, the weight parts of aggregate contained in the first group of ceramic green embryos are 40 to 46 parts, the average particle size of the aggregate is 70 to 75 um, the weight parts of the pore-forming agent are 25 to 28 parts, and the average particle size of the pore-forming agent is 40 to 50 um; the second group of ceramic green embryos The weight parts of aggregate contained in the ceramic green body are 45-50 parts, the average particle size of the aggregate is 40-60um, the weight parts of the pore former are 20-25 parts, and the average particle size of the pore former is 40-50um; the weight parts of aggregate contained in the third group of ceramic green bodies are 40-48 parts, the average particle size of the aggregate is 15-30um, the weight parts of the pore former are 25-30 parts, and the average particle size of the pore former is 35-40um; the weight parts of aggregate contained in the fourth group of ceramic green bodies are 35-45 parts, the average particle size of the aggregate is 10-20um, the weight parts of the pore former are 25-30 parts, and the average particle size of the pore former is 35-40um. 一种多片层多孔陶瓷雾化芯，其特征在于，包括如权利要求1-29任一项所述的多片层多孔陶瓷基体，所述多片层多孔陶瓷基体的上下两面中其中一面设为雾化面，另一面设为导液面，所述雾化面的两端分别设有电极层，所述电极层通过丝网印刷的方式将所述金属浆料印刷并经过烧结制得，所述雾化面上还设有一层金属发热层，所述金属发热层通过金属溅射镀膜的工艺或通过丝网印刷另一金属浆料后烧结的工艺制得，所述金属发热层与所述电极层电连接。A multi-layer porous ceramic atomization core, characterized in that it includes a multi-layer porous ceramic substrate as described in any one of claims 1 to 29, one of the upper and lower surfaces of the multi-layer porous ceramic substrate is set as an atomization surface, and the other surface is set as a liquid guide surface, electrode layers are respectively provided at both ends of the atomization surface, and the electrode layers are printed by screen printing the metal slurry and sintering, and a metal heating layer is also provided on the atomization surface, and the metal heating layer is prepared by a metal sputtering coating process or by screen printing another metal slurry and then sintering, and the metal heating layer is electrically connected to the electrode layer. 根据权利要求30所述的多片层多孔陶瓷雾化芯，其特征在于，在所述多片层多孔陶瓷基体的上下两面中选择微孔的孔径较小的一面设为雾化面，另一面设为导液面。The multi-layer porous ceramic atomization core according to claim 30 is characterized in that, among the upper and lower surfaces of the multi-layer porous ceramic substrate, one side with a smaller pore size of the micropores is selected as the atomization surface, and the other side is set as the liquid guide surface.
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