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WO2020228773A1 - 加热空气式电子烟加热器、陶瓷发热体及其制备方法 - Google Patents

加热空气式电子烟加热器、陶瓷发热体及其制备方法 Download PDF

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Publication number
WO2020228773A1
WO2020228773A1 PCT/CN2020/090241 CN2020090241W WO2020228773A1 WO 2020228773 A1 WO2020228773 A1 WO 2020228773A1 CN 2020090241 W CN2020090241 W CN 2020090241W WO 2020228773 A1 WO2020228773 A1 WO 2020228773A1
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WIPO (PCT)
Prior art keywords
ceramic
heating
alumina
honeycomb ceramic
honeycomb
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.)
Ceased
Application number
PCT/CN2020/090241
Other languages
English (en)
French (fr)
Inventor
朱肖华
熊兆荣
付增学
于祥一
刘茂琦
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.)
Xiamen Fengtao Ceramics Co Ltd
Original Assignee
Xiamen Fengtao Ceramics 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
Priority claimed from CN201920707429.2U external-priority patent/CN210329363U/zh
Priority claimed from CN201920703695.8U external-priority patent/CN210329353U/zh
Priority claimed from CN201910409470.6A external-priority patent/CN110022622B/zh
Priority claimed from CN201920703126.3U external-priority patent/CN210094680U/zh
Priority to MYPI2021006624A priority Critical patent/MY209947A/en
Priority to CA3139872A priority patent/CA3139872A1/en
Priority to PL20805728.1T priority patent/PL3970524T3/pl
Priority to JP2021566977A priority patent/JP7292756B2/ja
Priority to KR1020217039752A priority patent/KR20220008292A/ko
Priority to PH1/2021/552792A priority patent/PH12021552792A1/en
Application filed by Xiamen Fengtao Ceramics Co Ltd filed Critical Xiamen Fengtao Ceramics Co Ltd
Priority to ES20805728T priority patent/ES3014030T3/es
Priority to UAA202106365A priority patent/UA128048C2/uk
Priority to MX2021013935A priority patent/MX2021013935A/es
Priority to BR112021022827-6A priority patent/BR112021022827B1/pt
Priority to SG11202112672XA priority patent/SG11202112672XA/en
Priority to AU2020276530A priority patent/AU2020276530B2/en
Priority to EP20805728.1A priority patent/EP3970524B1/en
Publication of WO2020228773A1 publication Critical patent/WO2020228773A1/zh
Priority to ZA2021/08572A priority patent/ZA202108572B/en
Priority to US17/517,686 priority patent/US20220053830A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
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    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/024—Heaters using beehive flow through structures
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/167—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed resistors

Definitions

  • the invention relates to the technical field of electronic cigarettes, in particular to a ceramic heating element, a heated air electronic cigarette heater with the ceramic heating element, and a preparation method of the ceramic heating element.
  • Smoking products such as cigarettes and cigars burn tobacco during use to produce tobacco smoke.
  • Tobacco burning smoke contains many carcinogens, such as tar, long-term inhalation of these substances will cause great harm to the human body.
  • carcinogens such as tar
  • tar carcinogens
  • One of the typical e-cigarette solutions is to provide alternatives to these types of products by producing products that release compounds without burning. Examples of such products are so-called heat-not-burn products, also called tobacco heating products or tobacco heating devices, which release compounds by heating but not burning the material.
  • the heating and baking technology of heating non-combustion electronic cigarette products on the market mainly uses heat transfer to transfer and exchange heat.
  • the existing heating methods include sheet heating (needle heating) and tubular heating methods, such as CN201380044053 .7 "Smoky products used with internal heating elements", the heating method is sheet heating (needle heating), but this heating method has a higher temperature in the center and lower peripheral temperature.
  • the tobacco in the part of the heating element is fully carbonized or even charred, while the surrounding tobacco has not been carbonized, and the tobacco waste is large; another example is the "electrically heated smoking system with internal or external heater" disclosed by CN201080053099.1.
  • tubular heating It is tubular heating, and tubular heating is that the part close to the tube wall is more fully carbonized and the center cannot be fully carbonized. If the temperature is increased, the cigarette paper will burn, which will affect the taste.
  • the summary is that the current heating device has technical defects such as uneven baking, small amount of smoke, light taste, and poor user experience, and the pollutants produced by smoking after e-cigarette products are used for a long time will adhere to the products, resulting in The product will smell.
  • the heating components of heat-not-burn electronic cigarette products mainly include the following three types:
  • the ceramic heating element is made of zirconia ceramic substrate + precious metal heating slurry, which is small in size, light in weight, can obtain high power density, and high thermal efficiency; it has excellent thermal characteristics, fast heating speed, and can obtain arbitrary temperature distribution; reliable High performance, long life, heating element materials will not oxidize, excellent acid and alkali resistance; corrosion resistance, high temperature resistance, uniform temperature, good thermal conductivity, and fast thermal compensation.
  • the center heating will cause the temperature distribution of the entire heating element to be uneven, and the temperature difference between the top and the bottom reaches about 100 degrees Celsius, resulting in insufficient curing of the tobacco or even a burnt smell, and a large waste of tobacco.
  • a special cartridge and a sheet-shaped heating body are required to achieve the effect, which limits the scope of application.
  • the heating element with rod-shaped structure has high strength and will not be broken.
  • the high temperature co-fired ceramic heating element has good compactness.
  • the heating wire is completely wrapped in the ceramic, and the long-term use reliability is high.
  • the solder joint adopts 1000 °C silver brazing process , The solder joints are stable and can withstand 350°C high temperature for a long time.
  • the heating wire needs to reach a high temperature to achieve the heating effect. Not only the heat exchange efficiency is low, but also due to the high temperature of the heating wire, the metal ions separated from the heating wire may be caused Mixed into the suction airflow into the human body, endangering human health.
  • Heating cup ⁇ heating tube ⁇ heating pan are typical representatives of surrounding heat. Ring segment heating, precise temperature control. But the biggest problem of this method is the low heat utilization rate. Part of the heat is absorbed by the tobacco, and the other part is emitted as heat. If the heat insulation is not done well, the smoking set will be hot and affect the user's use.
  • the contact heating and baking technology mainly conducts heat transfer and exchange through heat transfer, that is, a heating conductor (such as a ceramic heating sheet or a needle) conducts temperature to the object to be baked (a smoking product).
  • a heating conductor such as a ceramic heating sheet or a needle
  • the to-be-baked object has poor thermal conductivity and cannot fully transfer the temperature, resulting in uneven baking inside and outside the to-be-baked object
  • Various types of to-be-baked objects The space density varies greatly. When replacing different types of objects to be baked, the heating and baking effect is difficult to guarantee. Usually, the matching baked objects must be used to have better results, and the adaptability is poor.
  • this type of heating device has technical defects such as uneven baking, small amount of smoke, weak taste, and poor user experience, which severely restrict the further development and popularization and application of this field.
  • the inventor of the present application has discovered through a lot of research and experiments that the process of smoking itself is a process of air flow. If the temperature of the air flowing into the smoking product is relatively high, the hot air can directly serve to bake the smoke. The function of the product, and since the hot air can penetrate all the tobacco of the roasted smoking product with the suction process relatively completely and uniformly, the problem of uneven heating will be effectively solved. Therefore, the heating scheme is realized by heating the air and then using the hot air flow during the suction process to bake the smoking product, and the overall heating effect will be better.
  • the air heating scheme it is first necessary to select a suitable heating element to heat the air.
  • room temperature air is required to enter the heating element, and the air temperature after the heating element reaches 300°C or more;
  • the general suction habit needs to be considered, that is, the temperature rise process needs to support about 20ml per second, and each puff is about 3 seconds, and the heating element needs a total heating efficiency of about 60ml of air.
  • the inventors have obtained through a large number of experiments that when the heating wire is used to heat the air, a higher temperature of the heating wire is required to heat the air by the heating wire only, and only when the temperature of the heating wire reaches 600°C or higher. , In order to heat the flowing air to above 300°C, and once the airflow passes through the heating wire will quickly cool down, so that the single-port suction action will make the temperature of the heating wire drop by 200-300°C. For this reason, it is necessary to compensate the power of the heating wire during suction, otherwise it is difficult to achieve the effect of heating the air required for smoking cigarettes.
  • the temperature of the heating wire when the temperature of the heating wire is increased to heat the flowing air to above 300°C, the temperature of the heating wire may increase, which may cause the metal ions separated by the heating wire to mix into the suction airflow and enter the human body, endangering human health .
  • the inventor of the present application has concluded through a lot of research that when the air heating solution is used to bake smoking products, the air heating element needs to have a larger heating area to reduce the temperature difference between the heating element and the air. At the same time, the heating element also needs a larger heat capacity to resist the cooling after the suction airflow passes, and the heating element also needs a higher thermal conductivity to reduce the heating preparation time.
  • the applicant has discovered, based on years of in-depth research on ceramics, that by designing the porous structure of the honeycomb ceramic, a larger heating surface area can be brought about, so that the heating element has a high air heating efficiency, and the porous ceramic honeycomb ceramic generates
  • the body is closer to a solid structure and has a higher heat capacity than a ceramic tube of the same volume.
  • the thermal conductivity of the alumina material is greater than 30W/MK, which can make the heat conduct faster and more uniformly, and the thermal conductivity is high. Therefore, the porous structure is adopted.
  • the honeycomb ceramic heating element can meet the needs of air heating to bake smoking products.
  • the first object of the present invention is to provide a ceramic heating element that can quickly and uniformly heat up, has a large heating surface, low power consumption, long service life, and good heat preservation performance.
  • the ceramic heating element proposed by the embodiment of the first aspect of the present invention includes: a honeycomb ceramic body, the honeycomb ceramic body is provided with a porous channel, the porous channel is a circular hole or a polygonal hole;
  • the heat generating printed circuit is arranged around the outer surface of the honeycomb ceramic body to heat the air passing through the porous channel.
  • the ceramic honeycomb body is an alumina honeycomb ceramic body, and the density of the alumina honeycomb ceramic body is not less than 3.86 g/cm 3 .
  • the porous channels are evenly distributed in the honeycomb ceramic body.
  • the porous channel is provided in the center of the honeycomb ceramic body.
  • the honeycomb ceramic body is a columnar body with a circular or polygonal cross section.
  • the alumina honeycomb ceramic heating element proposed by an embodiment of the present invention includes an alumina honeycomb ceramic body, a heating printed circuit, and a wire; the center of the alumina honeycomb ceramic body is provided with a porous channel; the porous channels are evenly arranged The heating printed circuit is arranged around the outer surface of the alumina honeycomb ceramic body; the first end of the heating printed circuit is provided with wires.
  • the resistance of the alumina honeycomb ceramic body is 0.1-2 ⁇ .
  • alumina honeycomb ceramic body is a columnar body with a circular, square or polygonal cross section.
  • the pore size of the porous channel is 0.1-2 mm; the wall thickness of the porous channel is 0.1-0.5 mm.
  • the materials of the heat-generating printed circuit include but are not limited to silver, tungsten, MoMn, and other suitable printed circuit materials are acceptable.
  • the printing thickness of the heat generating printed circuit is 0.005 to 0.05 mm.
  • the material of the wire includes but is not limited to copper, silver, and nickel, and the diameter thereof is 0.1-0.3 mm.
  • the surface density of the high-purity alumina honeycomb ceramic is very high, which can effectively prevent the adsorption of soot particles and has the effect of preventing peculiar smell.
  • the high-purity alumina honeycomb ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/mk.
  • the wall thickness and pore diameter in the honeycomb ceramic structure are very small, and the thermal conductivity is extremely good.
  • the shape of the honeycomb porous can be greatly increased.
  • the contact area of the alumina honeycomb ceramic is large, the heating efficiency is high, and the purpose of heating the air can be achieved faster.
  • the honeycomb ceramic heating body of the present invention is arranged under the cigarette to be roasted and does not contact the cigarette to be roasted.
  • the air heated by the honeycomb ceramic heating body at the bottom contacts the cigarette, thereby heating the cigarette quickly and uniformly .
  • Due to the porous structure of the honeycomb the gas flow rate is limited to a certain extent, and the contact time between the hot air and the cigarette is longer, which slows the loss of heat and saves energy.
  • the porous shape of the honeycomb ceramic can simultaneously lock the hot air, reduce the outflow of hot gas, and further save energy.
  • the second object of the present invention is to provide a heated air electronic cigarette heater that can be baked uniformly and will not pollute the product due to the pollutants in the fluid or the heating element directly contacting the cartridge.
  • the air-heated electronic cigarette heater provided by the embodiment of the second aspect of the present invention includes the ceramic heating element described in the above embodiment; a pre-heating device, and the ceramic heating element is arranged below the pre-heating device .
  • the preheating device includes a preheating tube, a guide vane is arranged between the preheating tube and the ceramic heating element, and a plurality of guide holes are opened on the guide vane.
  • the ceramic heating element and the pre-heating device are arranged in a sealing sleeve.
  • the pre-heating device includes a thin-walled alumina ceramic tube for preheating, a cavity in the center of the thin-walled alumina ceramic tube is used for placing smoking products, and the thin-walled alumina ceramic tube The opening at one end is combined with the bottom plate to form a cup, and the bottom plate is provided with a plurality of hot air flow through holes.
  • the density of the thin-walled alumina ceramic tube is not less than 3.86 g/cm 3 .
  • a plurality of hot air flow through holes are uniformly arranged around a virtual circle in the center of the bottom plate, and the hot air flow through holes are circular holes with a diameter range of 0.1-2 mm.
  • the material of the bottom plate is high-purity alumina ceramics.
  • the heated air electronic cigarette heater includes a preheating tube and a ceramic heating element, and a ceramic heating element is arranged under the preheating tube; the ceramic heating element includes a honeycomb ceramic body and a ceramic heating element.
  • preheating tube, ceramic heating element and guide vane are made of high-purity alumina ceramics.
  • heat-generating printed circuit printing materials include but are not limited to silver, tungsten, and MoMn.
  • the wire material includes but is not limited to silver, copper, and nickel.
  • honeycomb porous channels are uniformly arranged circular holes or polygonal holes, and the pore diameter ranges from 0.1 to 2 mm, and the minimum distance between two adjacent holes is 0.1 to 0.5 mm.
  • the air is heated by the heating element, so that the heated flowing air evenly roasts the tobacco, so as to achieve the effects of increasing the amount of smoke, good smoking taste, and good user experience .
  • the preheating tube, heating element and deflector are made of high-purity alumina ceramics.
  • the high-purity alumina ceramics have high density, and there are almost no pores in the microstructure.
  • the pollutants in the fluid cannot penetrate into it and cannot be on the surface. It leaves pollution and peculiar smell, and because the air heating method does not touch the cartridge, it can ensure that the device is not polluted.
  • the pre-heating device can achieve rapid and uniform heating, and play the role of pre-heating and heat preservation.
  • the pre-heating device includes a thin-walled alumina ceramic tube for preheating, the cavity in the center of the thin-walled alumina ceramic tube is used for placing smoking products; one end of the thin-walled alumina ceramic tube is combined with a bottom plate Into a cup; the bottom plate is provided with a plurality of hot air through holes.
  • the density of the thin-walled alumina ceramic tube is not less than 3.86 g/cm 3 .
  • the thin-walled alumina ceramic tube is a thin-walled alumina ceramic hollow round tube with a wall thickness ranging from 0.1 to 0.5 mm.
  • the shape of the bottom plate matches the shape of the opening section of the thin-walled alumina ceramic tube.
  • a plurality of hot air flow through holes are uniformly arranged on the center of the bottom plate around a virtual circle; the hot air flow through holes are round holes, and the aperture range is 0.1-2 mm.
  • the thickness of the bottom plate is 0.1-0.5 mm.
  • the material of the bottom plate is high-purity alumina ceramics.
  • the pre-heating device By installing the pre-heating device above the air heating element, when the heating element is heated, since the bottom plate and the thin-walled alumina ceramic tube are both ultra-thin high-purity alumina ceramics, they can be quickly heated to achieve the effect of preheating the cavity. At the same time, the thin-walled alumina ceramic tube is not used as a traditional heating part, which can reduce heat loss.
  • the heating of the smoking product is through the user's suction action, and the hot air is extracted from the heating part under the hot air flow hole to bake the smoking product.
  • the baking effect is good and the baking is even.
  • the hot air flow hole can facilitate the circulation of hot air on the one hand.
  • the high-purity alumina ceramic material has good compactness, can reduce the adsorption of soot particles, has no peculiar smell, and is safer to use.
  • the third object of the present invention is to provide a method for preparing a ceramic heating element.
  • the preparation method of the ceramic heating element proposed in the embodiment of the third aspect of the present invention includes the following steps:
  • Step 1 Preparation of alumina ceramic mud: add 0.01-0.05 parts by weight of magnesium nitrate, 0.01-0.05 parts by weight of zirconium oxychloride, 0.01-0.05 parts by weight of yttrium nitrate into 100 parts by weight of nano alumina powder, Put 1.5 ⁇ 2.5 parts by weight of oleic acid, 1 ⁇ 2 parts by weight of lubricant, 3 ⁇ 15 parts by weight of binder and 10 ⁇ 30 parts by weight of deionized water into the mixer, and mix 1 ⁇ 5h, prepare alumina honeycomb ceramic mud with uniform dispersion and solid content of 75-85% for use;
  • Step 2 Molding of alumina honeycomb ceramic:
  • the alumina honeycomb ceramic slurry prepared in step 1 is put into a screw-type ceramic extrusion molding machine with a vacuum degassing device.
  • the ceramic slurry is extruded through the die head under the push of the screw.
  • Step 3 Drying of alumina honeycomb ceramic blanks: move the ceramic blanks prepared in step 2 to an oven, and dry and dehydrate for 5-10 minutes under hot air conditions of 40-50°C to obtain ceramic raw materials whose appearance and straightness meet the requirements.
  • Step 4 Debinding of alumina ceramic green body: the ceramic green body prepared in step 3 is biscuited at 1100-1200°C to obtain ceramic green body;
  • Step five firing of alumina honeycomb ceramic: placing the ceramic biscuit in step four in a high-temperature molybdenum tube at 1600-1800°C under hydrogen atmosphere or directly in the air to obtain alumina honeycomb ceramic;
  • Step 6 Fabrication of the printed circuit and its wires for the surface heating of the alumina honeycomb ceramic:
  • the alumina honeycomb ceramic prepared in step 5 is printed with a thick film electric heating wire on its outer surface using screen printing technology. After the printed circuit is dried, solder it Coat the plate with silver solder to stick the wire, enter the oven again for drying, and then move it to the furnace for sintering at 800-1500°C to obtain an integrated wire and printed circuit, and at the same time complete the silver in the wire Brazing.
  • the purity of the nano alumina powder used in the step one is greater than or equal to 99.99%, the particle size is 350 nm, and the specific surface area is 7 m 2 /g.
  • the purity of the alumina honeycomb ceramic produced by the preparation method of the embodiment of the present invention is about 99.99%, so that the surface of the honeycomb ceramic has a high density, can effectively prevent the adsorption of smoke particles, and has the effect of preventing peculiar smell.
  • the high-purity alumina honeycomb ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/mk, the wall thickness and pore size in the honeycomb ceramic structure are small, and the thermal conductivity is extremely good.
  • the honeycomb porous shape can be greatly increased with air
  • the contact area of the alumina honeycomb ceramic is large, the heating efficiency is high, and the purpose of heating the air can be achieved faster.
  • the honeycomb ceramic heating body of the present invention is arranged under the cigarette to be roasted and does not contact the cigarette to be roasted.
  • the air heated by the honeycomb ceramic heating body at the bottom contacts the cigarette, thereby heating the cigarette quickly and uniformly .
  • Due to the porous structure of the honeycomb the gas flow rate is limited to a certain extent, and the contact time between the hot air and the cigarette is longer, which slows the loss of heat and saves energy.
  • the porous shape of the honeycomb ceramic can simultaneously lock the hot air, reduce the outflow of hot gas, and further save energy.
  • Fig. 1 is a schematic structural diagram of a ceramic heating element according to an embodiment of the present invention
  • FIG. 2 is a schematic plan view of a printed circuit on the surface of an alumina honeycomb ceramic heating element according to an embodiment of the present invention
  • Fig. 3 is a schematic structural diagram of a heated air electronic cigarette heater according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a heated air electronic cigarette heater according to another embodiment of the present invention.
  • Fig. 5 is a schematic structural diagram of a heated air electronic cigarette heater according to another embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a deflector according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural diagram of a pre-heating device according to an embodiment of the present invention.
  • connection may be a fixed connection It can also be detachably connected or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection may be a fixed connection It can also be detachably connected or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the ceramic heating element proposed in the embodiment of the present invention includes a honeycomb ceramic body 1 and a heating printed circuit 2.
  • the honeycomb ceramic body 1 is provided with a porous channel 11, which is a circular hole or a polygonal hole; the heating printed circuit 2 is arranged around the outer surface of the honeycomb ceramic body 1 to heat the air passing through the porous channel 11.
  • the ceramic honeycomb body is an alumina honeycomb ceramic body, and the density of the alumina honeycomb ceramic body is not less than 3.86 g/cm 3 .
  • the porous channels are evenly distributed in the honeycomb ceramic body.
  • the porous channel is provided in the center of the honeycomb ceramic body.
  • the honeycomb ceramic body is a columnar body with a circular or polygonal cross section.
  • an alumina honeycomb ceramic heating element proposed by the present invention includes an alumina honeycomb ceramic body 1, a heating printed circuit 2, and a wire 3.
  • the alumina honeycomb ceramic body 1 is provided with a porous channel 11 in the center;
  • the porous channels 11 are uniformly arranged square holes;
  • the heat-generating printed circuit 2 is arranged around the outer surface of the alumina honeycomb ceramic body 1; the leading end of the heat-generating printed circuit 2 is provided with a wire 3.
  • the density of the alumina honeycomb ceramic body 1 is 3.9 g/cm 3 .
  • the resistance of the alumina honeycomb ceramic body 1 is 0.6 ⁇ .
  • alumina honeycomb ceramic body 1 is a columnar body with a circular cross section.
  • the square hole diameter of the porous channel 11 is 1.5mm, that is, the side length of the square hole is 1.5mm; the wall thickness of the porous channel 11 is 0.2mm, as shown in FIG. 1, two adjacent square holes correspond to the sides The distance between is the wall thickness of the porous channel 11.
  • the material of the heat-generating printed circuit 2 is silver.
  • the printing thickness of the heating printed circuit 2 is 0.015 mm.
  • the wire 3 is a silver wire with a diameter of 0.2 mm.
  • an alumina honeycomb ceramic heating element proposed by the present invention includes an alumina honeycomb ceramic body 1, a heating printed circuit 2, and a wire 3.
  • the alumina honeycomb ceramic body 1 is provided with a porous channel 11 in the center;
  • the porous channels 11 are uniformly arranged round holes;
  • the heating printed circuit 2 is arranged around the outer surface of the alumina honeycomb ceramic body 1; the leading end of the heating printed circuit 2 is provided with a wire 3;
  • the density of the alumina honeycomb ceramic body 1 is 3.9 g/cm3.
  • the resistance of the alumina honeycomb ceramic body 1 is 0.8 ⁇ .
  • the alumina honeycomb ceramic body 1 is a cylindrical body with a circular cross section, and the porous channel 11 in the center thereof is a square hole.
  • the circular hole diameter of the porous channel 11 is 1.5 mm; the wall thickness of the porous channel 11 is 0.2 mm, and the minimum distance between two adjacent circular holes is the wall thickness of the porous channel 11.
  • the material of the heat-generating printed circuit 2 is silver.
  • the printing thickness of the heating printed circuit 2 is 0.02 mm.
  • the wire 3 is a silver wire with a diameter of 0.2 mm.
  • the porous channel 11 is circular.
  • the utilization rate of the center of the alumina honeycomb ceramic body 1 is obviously not as high as that of the embodiment 1, and its specific surface area is smaller than that of the embodiment 1, and the heating efficiency is lower than that of the embodiment 1.
  • the purity of the aluminum oxide honeycomb ceramic of the present invention exceeds 99%, so that the surface of the honeycomb ceramic has a high density, can effectively prevent the adsorption of smoke particles, and has the effect of preventing peculiar smell.
  • the high-purity alumina honeycomb ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/mk, the wall thickness and pore diameter in the honeycomb ceramic structure are small, and the thermal conductivity is extremely good.
  • the shape of the honeycomb porous can be greatly increased.
  • the contact area of air, the specific surface area of alumina honeycomb ceramics is large, the heating efficiency is high, and the purpose of heating air can be realized faster.
  • the honeycomb ceramic heating body of the present invention is arranged under the cigarette to be roasted, and does not contact the cigarette to be roasted.
  • the method improves the heating area and heating efficiency of the cigarette body, the heating is more uniform, the carbonization of the cut tobacco is more complete, the waste of the cut tobacco is avoided, the taste of the user is improved, and the type of the smoke bomb is not restricted.
  • the gas flow rate is limited to a certain extent, and the contact time between the hot air and the cigarette is longer, which slows the loss of heat and saves energy.
  • the porous shape of the honeycomb ceramic can simultaneously lock the hot air, reduce the outflow of hot gas, and further save energy.
  • the embodiment of the present invention also provides a heated-air electronic cigarette heater.
  • the heated-air electronic cigarette heater includes the ceramic heating element 10 and the pre-heating device 20 described in the foregoing embodiment.
  • a ceramic heating element 10 is provided below the pre-heating device 20.
  • the preheating device includes a preheating tube, a guide vane is arranged between the preheating tube and the ceramic heating element, and a plurality of guide holes are opened on the guide vane.
  • the ceramic heating element and the pre-heating device are arranged in a sealing sleeve.
  • the preheating device includes a thin-walled alumina ceramic tube for preheating, and a cavity in the center of the thin-walled alumina ceramic tube is used for placing smoking products, and An opening at one end of the wall alumina ceramic tube is combined with a bottom plate to form a cup, and the bottom plate is provided with a plurality of hot air flow through holes.
  • the density of the thin-walled alumina ceramic tube is not less than 3.86 g/cm 3 .
  • a plurality of hot air flow through holes are uniformly provided around a virtual circle in the center of the bottom plate, and the hot air flow through holes are circular holes with a diameter range of 0.1-2 mm.
  • the material of the bottom plate may be high-purity alumina ceramics.
  • the air-heated electronic cigarette heater of the present invention includes a preheating tube 21 and a ceramic heating element 10, and a ceramic heating element is provided under the preheating tube 21 10;
  • the ceramic heating element 10 includes a honeycomb ceramic body 1 and a heating printed circuit 2 arranged on the honeycomb ceramic body 1, the end of the heating printed circuit 2 is provided with a wire 3, the honeycomb ceramic body 1 is provided with Honeycomb porous channel 11.
  • a guide vane 22 is provided between the preheating tube 21 and the ceramic heating element 10, and a plurality of guide holes 31 are opened on the guide vane 22.
  • preheating tube 21 and the ceramic heating element 10 are arranged in the sealing sleeve 4.
  • preheating tube 21, the ceramic heating element 10 and the guide vane 22 are all high-purity alumina ceramics.
  • the printing materials of the heat-generating printed circuit 2 include but are not limited to silver, tungsten, and MoMn.
  • the material of the wire 2 includes but is not limited to silver, copper, and nickel.
  • honeycomb porous channel 11 is a uniformly arranged circular hole or a polygonal hole, and the pore diameter ranges from 0.1 to 2 mm, and the minimum distance between two adjacent holes is 0.1 to 0.5 mm.
  • a ceramic heating element 10 is provided under the preheating tube 21, and a baffle 22 is provided between the preheating tube 21 and the ceramic heating element 10, so The preheating tube 21 and the ceramic heating element 10 are arranged in the sealing sleeve 4.
  • the ceramic heating element 10 includes a honeycomb ceramic body 1 on which a heating printed circuit 2 is provided.
  • a wire 3 is provided at the end of the printed circuit 2.
  • Smoked smoke can be generated after baking, so the device needs to be preheated.
  • the preheating tube 21 and the deflector 22 reaches 200°C
  • the preheating is completed. Since the preheating has been completed, the first and second mouth
  • the smoke bomb only needs to be heated from 200°C to 320°C when it is heated for the first time by inhalation, which is faster than from room temperature, and it can more guarantee the amount of smoke produced by the first and second puffs.
  • the honeycomb ceramic body 1 is provided with a honeycomb porous channel 11 and this porous channel is a uniformly arranged square hole or other polygonal hole.
  • the ceramic heating element 10 and the deflector 22 are made of high-purity alumina ceramics, the high-purity alumina ceramics have good electrical insulation, high strength, and good thermal conductivity, so the ceramic heating element 10 will not be heated when heated.
  • the sealing sleeve 4 plays a sealing role to ensure that the hot air will not flow to other places.
  • a ceramic heating element 10 is arranged under the preheating tube 21, and the preheating tube 21 and the ceramic heating element 10 are arranged in the sealing sleeve 4, as shown in FIG.
  • the ceramic heating element 10 includes a honeycomb ceramic body 1 on which a heating printed circuit 2 is provided, and a wire 3 is provided at the end of the heating printed circuit 2.
  • the preheating tube 21 When the temperature of the preheating tube 21 reaches 200°C, the preheating is completed. Since the preheating has been completed, the first and second suction is the first time When heating, the cartridge only needs to be heated from 200°C to 320°C, which is faster than from room temperature, and can more guarantee the amount of smoke produced by the first and second puffs.
  • the honeycomb ceramic body 1 is provided with a honeycomb porous channel 11 and this porous channel is a uniformly arranged square hole or other polygonal hole.
  • Its pore size ranges from 0.1 to 2mm, and the minimum distance between two adjacent holes is 0.1-0.5mm, the expansion area is large, so the heating air efficiency is very high, and the hot air flows from the center of the honeycomb without contacting the heating printed circuit 2 and will not cause pollution.
  • the preheating tube 21 and the ceramic heating element 10 are made of high-purity alumina ceramics, the high-purity alumina ceramics have good electrical insulation, high strength, and good thermal conductivity, so the ceramic heating element 10 will not leak electricity when heated, and it will be preheated
  • the tube 21 will also heat up quickly due to the good thermal conductivity of the high-purity alumina ceramics, so you can smoke bombs without waiting long; when the smoke bombs are pumped, the airflow passes through the ceramic heating element 10 and is heated to 320°C.
  • the heated air When the smoker starts smoking When the heated air flows through the ceramic heating element 10 to the preheating tube 21, the heated air will flow into the cartridge to evenly bake the tobacco inside, so as to increase the amount of smoke, the smoking taste is good, and the user experience Good results.
  • some fluid pollutants emitted by the cartridge will inevitably remain in the device. Due to the high density of high-purity alumina ceramics, there are almost no pores in the microstructure, and the pollutants in the fluid cannot penetrate into it. Inside, no pollution and odor can be left on the surface.
  • the sealing sleeve 4 plays a sealing role to ensure that the hot air will not flow to other places.
  • a ceramic heating element 10 is provided under the preheating tube 21, and a deflector 22 is provided between the preheating tube 21 and the ceramic heating element 10, such as As shown in Fig. 1, the ceramic heating element 10 includes a honeycomb ceramic body 1, on which a heating printed circuit 2 is provided, and a wire 3 is provided at the end of the heating printed circuit 2, which is used when a smoker needs to smoke.
  • the cartridge is put into the preheating tube 21 to prevent the cartridge from falling. After power on, the heat-generating printed circuit 2 starts to heat up.
  • the cartridge can be baked at 280°C-320°C to bake out the effective ingredients such as nicotine, which can cause smoking Therefore, the device needs to be preheated.
  • the preheating tube 21 and the guide vane 22 When the temperature of the preheating tube 21 and the guide vane 22 reaches 200°C, the preheating is completed. Since the preheating has been completed, the first and second suction is the first heating At that time, the cartridge only needs to be heated from 200°C to 320°C, which is faster than from room temperature, and can more guarantee the amount of smoke produced in the first and second puffs.
  • the honeycomb ceramic body 1 is provided with a honeycomb porous channel 11 and this porous channel is a uniformly arranged square hole or other polygonal hole.
  • the ceramic heating element 10 and the deflector 22 are made of high-purity alumina ceramics, the high-purity alumina ceramics have good electrical insulation, high strength, and good thermal conductivity, so the ceramic heating element 10 will not be heated when heated.
  • the pre-heating device includes a thin-walled alumina ceramic tube 21 for preheating, and a cavity 210 in the center of the thin-walled alumina ceramic tube 21 is used for placing smoking products such as smoke bombs;
  • the opening at one end of the thin-walled alumina ceramic tube 21 is combined with the bottom plate 23 to form a cup;
  • the bottom plate 23 is provided with a number of hot air flow through holes 32;
  • the density of the thin-walled alumina ceramic tube 21 is not less than 3.86g/ cm 3 ;
  • the thin-walled alumina ceramic tube 21 is a thin-walled alumina ceramic hollow round tube with a wall thickness of 0.2mm;
  • the shape of the bottom plate 23 matches the shape of the opening of the thin-walled alumina ceramic tube 21;
  • the center of the bottom plate 23 is uniformly provided with 8 hot air flow through holes 32 around a virtual circle;
  • the hot air flow through holes 32 are round holes with an aperture range of 1.5 mm;
  • the purity of ultra-thin high-purity alumina ceramics exceeds 99%, which makes the surface of the ceramics very dense, which can effectively prevent the adsorption of smoke particles and play an anti-odor effect.
  • the ultra-thin high-purity alumina ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/m.k, and the heating efficiency is high, which can achieve the purpose of preheating the air in the cavity 210 faster.
  • the preheating device is installed above an air heating element such as a ceramic heating element 10.
  • a ceramic heating element such as a ceramic heating element 10.
  • the heating element is heated, since the bottom plate 23 and the thin-walled alumina ceramic tube 21 are both ultra-thin high-purity alumina ceramics, they can be quickly heated to achieve The effect of preheating the cavity 210.
  • the thin-walled alumina ceramic tube 21 is not used as a traditional heating component, which can reduce heat loss.
  • a heating scheme in the related art is to use a ceramic heating tube to directly bake the smoking product.
  • the heating circuit is printed on the outer surface of the ceramic heating tube. After power on, the high temperature of the ceramic heating tube itself is used to bake the smoking product.
  • the heat utilization rate of the method is low, and a large amount of heat is released outside while roasting the tobacco, which is not economical and environmentally friendly.
  • the smoking product is heated by the user's suction action, and hot air is drawn from the heating part below the hot air flow through hole 32 to bake the smoking product, the baking effect is good, the baking is uniform, and the hot air flow through the hole
  • it can facilitate the circulation of hot air, and on the other hand, it also prevents the direct diffusion of hot air when no suction action is performed, which has the effect of heat preservation.
  • the high-purity alumina ceramic material has good compactness, can reduce the adsorption of soot particles, has no peculiar smell, and is safer to use.
  • the embodiment of the present invention also proposes a method for preparing a ceramic heating element, which includes the following steps:
  • Step 1 Preparation of alumina ceramic mud: add 0.01-0.05 weight parts of magnesium nitrate, 0.01-0.05 weight parts of zirconium oxychloride, 0.01-0.05 weight parts of yttrium nitrate into 100 weight parts of nano alumina powder, Put 1.5 ⁇ 2.5 parts by weight of oleic acid, 1 ⁇ 2 parts by weight of lubricant, 3 ⁇ 15 parts by weight of binder and 10 ⁇ 30 parts by weight of deionized water into the mixer, and mix 1 ⁇ 5h, prepare the alumina honeycomb ceramic mud with uniform dispersion and solid content of 75-85% for use.
  • Step 2 Molding of alumina honeycomb ceramic:
  • the alumina honeycomb ceramic slurry prepared in step 1 is put into a screw-type ceramic extrusion molding machine with a vacuum degassing device.
  • the ceramic slurry is extruded through the die head under the push of the screw. Hollow, thin-walled honeycomb ceramic blanks.
  • Step 3 Drying of alumina honeycomb ceramic blanks: move the ceramic blanks prepared in step 2 to an oven, and dry and dehydrate for 5-10 minutes under hot air conditions of 40-50°C to obtain ceramic raw materials whose appearance and straightness meet the requirements.
  • Step 4 Debinding of alumina ceramic green body: the ceramic green body prepared in step 3 is biscuited at 1100-1200°C to obtain ceramic green body.
  • Step five firing of alumina honeycomb ceramics: placing the ceramic biscuit in step four in a high-temperature molybdenum tube at 1600-1800°C for firing in a hydrogen atmosphere or directly in air to obtain alumina honeycomb ceramics.
  • Step 6 Fabrication of the printed circuit and its wires for the surface heating of the alumina honeycomb ceramic:
  • the alumina honeycomb ceramic prepared in step 5 is printed with a thick film electric heating wire on its outer surface using screen printing technology. After the printed circuit is dried, solder it Coat the plate with silver solder to stick the wire, enter the oven again for drying, and then move it to the furnace for sintering at 800-1500°C to obtain an integrated wire and printed circuit, and at the same time complete the silver in the wire Brazing.
  • the purity of the nano alumina powder used in the step one is greater than or equal to 99.99%, the particle size is 350 nm, and the specific surface area is 7 m 2 /g.
  • the above-mentioned preparation method of the alumina honeycomb ceramic heating element includes the following steps:
  • Step 1 Preparation of alumina ceramic tube mud: add 100 parts by weight of nano alumina powder, 0.04 parts by weight of Mg(NO 3 ) 2 ⁇ 6H 2 O, 0.04 parts by weight of ZrOCl 2 ⁇ 8H 2 O, 0.01 Parts by weight of Y(NO 3 ) 3 ⁇ 6H 2 O, 2.4 parts by weight of oleic acid, 1.2 parts by weight of polyethylene glycol 600, 14 parts by weight of high-purity ethyl cellulose ether, and 12 parts by weight of deionized water are put into the mixer, Mix for 5 hours at a temperature below 30°C to prepare alumina honeycomb ceramic mud with uniform dispersion and 75% solid content for use;
  • Step 2 Formation of alumina honeycomb ceramic: the alumina honeycomb ceramic slurry prepared in step 1 is put into a screw-type ceramic extrusion molding machine with a vacuum degassing device. The ceramic slurry is extruded through the die head under the push of the screw. Hollow, thin-walled honeycomb ceramic blanks;
  • Step 3 Drying of the alumina honeycomb ceramic blank: The ceramic blank prepared in step 2 is moved to an oven, dried and dehydrated for 5 minutes under hot air conditions at 49°C to obtain a ceramic green body that meets the requirements in appearance and straightness;
  • Step 4 Degumming of the alumina ceramic green tube: the ceramic green body prepared in step 3 is biscuited at 1190°C to obtain a ceramic biscuit;
  • Step 5 firing of alumina ceramics: placing the ceramic biscuit in step 4 in a high-temperature molybdenum tube and firing in a hydrogen atmosphere or directly in the air at 1650°C to obtain alumina honeycomb ceramics;
  • Step 6 The production of the printed circuit and its wires on the surface of the alumina ceramic tube:
  • the alumina ceramic tube prepared in step 5 is printed with a thick film electric heating wire on its outer surface using screen printing technology. After the printed circuit is dry, the Coating silver solder on the plate to stick the wire, enter the oven again for drying, and then move it to the atmospheric hydrogen furnace for sintering at 800°C to obtain the wire co-fired alumina honeycomb ceramic body heating element, and complete the wire in the furnace In silver brazing.
  • the purity of the nano alumina powder used in step one is greater than or equal to 99.99%, the particle size is 350 nm, and the specific surface area is 7 m 2 /g.
  • the density of the alumina honeycomb ceramic body is 3.9 g/cm 3 .
  • the resistance of the alumina honeycomb ceramic body is 0.6 ⁇ .
  • the alumina honeycomb ceramic body is a columnar body with a circular cross section, and the porous channel in the center thereof is a square hole uniformly arranged.
  • the square hole diameter of the porous channel is 1.5mm, that is, the side length of the square hole is 1.5mm;
  • the wall thickness of the porous channel is 0.2mm, as shown in Figure 1, the distance between the corresponding sides of two adjacent square holes That is, the wall thickness of the porous channel.
  • the material of the heat-generating printed circuit is silver.
  • the printing thickness of the heating printed circuit is 0.015 mm.
  • the wire is a silver wire with a diameter of 0.2 mm.
  • the above-mentioned preparation method of the alumina honeycomb ceramic heating element includes the following steps:
  • Step 1 Preparation of alumina ceramic tube mud: add 100 parts by weight of nano alumina powder, 0.02 parts by weight of Mg(NO 3 ) 2 ⁇ 6H 2 O, 0.05 parts by weight of ZrOCl 2 ⁇ 8H 2 O, 0.015 Put parts by weight of Y(NO 3 ) 3 ⁇ 6H 2 O, 2 parts by weight of oleic acid, 1.5 parts by weight of polyethylene glycol 600, 8 parts by weight of high-purity ethyl cellulose ether and 20 parts by weight of deionized water into the mixer, Mix for 5 hours at a temperature below 30°C to prepare alumina honeycomb ceramic mud with uniform dispersion and 78% solid content for use;
  • Step 2 Formation of alumina honeycomb ceramic: the alumina honeycomb ceramic slurry prepared in step 1 is put into a screw-type ceramic extrusion molding machine with a vacuum degassing device. The ceramic slurry is extruded through the die head under the push of the screw. Hollow, thin-walled honeycomb ceramic blanks;
  • Step 3 Drying of the alumina honeycomb ceramic blank: The ceramic blank prepared in step 2 is moved to an oven, dried and dehydrated for 5 minutes under hot air conditions at 49°C to obtain a ceramic green body that meets the requirements in appearance and straightness;
  • Step 4 Debinding of the alumina ceramic green tube: the ceramic green body prepared in step 3 is biscuited at 1190° C. to obtain a ceramic biscuit;
  • Step 5 firing of alumina ceramics: placing the ceramic biscuit in step 4 in a high-temperature molybdenum tube and firing in a hydrogen atmosphere or directly in the air at 1650°C to obtain alumina honeycomb ceramics;
  • Step 6 The production of the printed circuit and its wires on the surface of the alumina ceramic tube:
  • the alumina ceramic tube prepared in step 5 is printed with a thick film electric heating wire on its outer surface using screen printing technology. After the printed circuit is dry, the Coating silver solder on the plate to stick the wire, enter the oven again for drying, and then move it to the atmospheric hydrogen furnace for sintering at 800°C to obtain the wire co-fired alumina honeycomb ceramic body heating element, and complete the wire in the furnace In silver brazing.
  • the purity of the nano alumina powder used in the step one is greater than or equal to 99.99%, the particle size is 350 nm, and the specific surface area is 7 m 2 /g.
  • the density of the alumina honeycomb ceramic body is 3.9 g/cm 3 .
  • the resistance of the alumina honeycomb ceramic body is 0.8 ⁇ .
  • the alumina honeycomb ceramic body is a columnar body with a circular cross section, and the porous channel in the center thereof is a square hole uniformly arranged.
  • the square hole diameter of the porous channel is 1.5mm, that is, the side length of the square hole is 1.5mm; the wall thickness of the porous channel is 0.2mm, as shown in Figure 1, between the corresponding sides of two adjacent square holes The distance is the wall thickness of the porous channel.
  • the material of the heat-generating printed circuit is silver.
  • the printing thickness of the heating printed circuit is 0.02 mm.
  • the wire is a silver wire with a diameter of 0.2 mm.
  • the purity of the alumina honeycomb ceramic produced by the preparation method of the present invention exceeds 99%, so that the surface of the honeycomb ceramic has a high density, can effectively prevent the adsorption of smoke particles, and has the effect of preventing peculiar smell.
  • the high-purity alumina honeycomb ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/mk, the wall thickness and pore diameter in the honeycomb ceramic structure are small, the thermal conductivity is extremely good, and the porous shape of the honeycomb can greatly increase the contact with the air Area, alumina honeycomb ceramic has a large specific surface area and high heating efficiency, which can achieve the purpose of heating air faster.
  • the honeycomb ceramic heating element of the present invention is arranged under the cigarette to be roasted and does not contact the cigarette to be roasted.
  • the method improves the heating area and heating efficiency of the cigarette body, the heating is more uniform, the carbonization of the cut tobacco is more complete, the waste of the cut tobacco is avoided, the taste of the user is improved, and the type of the smoke bomb is not restricted.
  • the gas flow rate is limited to a certain extent, and the contact time between the hot air and the cigarette is longer, which slows the loss of heat and saves energy.
  • the porous shape of the honeycomb ceramic can simultaneously lock the hot air, reduce the outflow of hot gas, and further save energy.

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Abstract

一种加热空气式电子烟加热器、陶瓷发热体（10）及其制备方法，其中，陶瓷发热体（10）包括：蜂窝陶瓷本体（1），蜂窝陶瓷本体（1）内设有多孔通道（11），多孔通道（11）为圆形孔或多边形孔；发热印刷电路（2），发热印刷电路（2）环绕设置在蜂窝陶瓷本体（1）的外表面，以对通过多孔通道（11）的空气进行加热。陶瓷发热体（10），使用高纯氧化铝蜂窝陶瓷，高纯氧化铝蜂窝陶瓷的表面致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果，高纯氧化铝蜂窝陶瓷具有良好的导热性，导热率高达33W/m.K，蜂窝陶瓷结构中的壁厚和孔径均很小，导热效果极其良好，同时蜂窝多孔的形状可以大大的增加与空气的接触面积，氧化铝蜂窝陶瓷的比表面积大，加热效率高，可以更快的实现加热空气的目的。

Description

加热空气式电子烟加热器、陶瓷发热体及其制备方法 技术领域
本发明涉及电子烟技术领域，特别涉及一种陶瓷发热体、一种具有该陶瓷发热体的加热空气式电子烟加热器以及一种陶瓷发热体的制备方法。
背景技术
香烟、雪茄等发烟制品在使用期间燃烧烟草以产生烟草烟雾。烟草燃烧的烟雾中含有很多致癌物质，如焦油，长期吸入这些物质会对人体产生非常大的危害。随着科技进步和人们对健康生活的追求，出现了一种香烟替代品即电子烟。其中一种典型的电子烟方案是通过产生在不燃烧的情况下释放化合物的产品来提供这些类型的制品的替代物。这种产品的示例为所谓的加热不燃烧产品，也称为烟草加热产品或烟草加热装置，其通过加热但不燃烧该材料来释放化合物。
目前市面上加热不燃烧型电子烟产品，其加热烘烤技术的主要通过热传递方式进行热量传递及交换，现有的加热方式有片状加热(针状加热)和管状加加热方式，例如CN201380044053.7公开的“与内部加热元件一起使用的发烟制品”，其加热方式便是片状加热(针状加热)，但是此种加热方式存在中心温度较高，而外围温度较低，靠近片状发热体部分的烟草充分碳化甚至烧焦而外围的烟草还未被碳化，烟草浪费大；又例如CN201080053099.1公开的“具有内部或外部加热器的电加热的发烟系统”，其加热方式便是管状加热，而管状加热是贴近管壁的部分碳化较充分中心则无法充分碳化，如果提高温度烟纸会出现烤焦的现象，影响口感。归纳总结便是目前的加热装置存在烘烤不均匀、烟雾量小、口感淡、用户体验差等技术缺陷，并且电子烟产品在使用长时间后吸烟所产生的污染物会附着在产品上，导致产品会有异味。
发明内容
本申请是基于发明人对以下问题的深入研究和不断试验而做出的：
相关技术中，加热不燃烧型电子烟产品的加热部件主要有以下三种：
一、陶瓷发热片
采用氧化锆陶瓷基片+贵金属发热浆料制成陶瓷发热片，体积小，重量轻，能够获得高功率密度，热效率高；有优异的热特征，升温速度快，能够得到任意的温度分布；可靠性高，长寿命，发热体材料不会氧化，耐酸碱性能优异；耐腐蚀，耐高温，温度均匀，导热性能好，热补偿速度快。
但是，采用陶瓷发热片加热发烟制品时，中心发热会导致整个发热体温度分布不均匀，顶部到底部的温度差达到100摄氏度左右，导致烟草烘烤不充分甚至有焦味，烟草浪费大，并且需要特质的烟弹与片状加热体配合才能达到效果，限制了应用范围。
二、圆柱体发热棒
采用棒状结构的发热体，强度高，不会被折断，高温共烧陶瓷发热体，致密性好，发热丝完全被包裹在陶瓷中，长期使用可靠性高，焊点采用1000℃银钎焊工艺，焊点稳定，长期可耐350℃高温。
但是，通过发热丝来使棒体进行发热，需要发热丝达到很高的温度才能实现加热效果，不仅热交换效率低，而且由于发热丝的温度较高，可能会导致发热丝分离出的金属离子混入抽吸气流而进入人体，危害人体健康。
三、陶瓷发热杯\发热管\发热锅
发热杯\发热管\发热锅是周围发热的典型代表。环状分段加热，精确控制温度。但此种方式最大的问题是热量利用率低，热量一部分被烟草吸收，另一部分以热量的形式散发出去，如果隔热做的不好的话，烟具会烫手，影响用户使用。
如上面所述，接触式加热烘烤技术主要通过热传递方式进行热量传递及交换，即一个发热导体(如陶瓷发热片或针)把温度传导给被烘烤物体(发烟制品)。此种加热方式缺点主要有两个：1、被烘烤物体(发烟制品)导热性能差，不能充分传递温度，导致烘烤物体内外烘烤不均匀；2、各种不同类型被烘烤物体空间密度差异大，更换不同类型被烘烤物体时，其加热烘烤效果很难保障，通常必须使用其配套的烘烤物才能具有较好的效果，适应性很差。总之，此类加热装置存在烘烤不均匀、烟雾量小、口感淡、用户体验差等技术缺陷，所述种种缺陷严重限制了本领域进一步向前发展和推广应用。
为此，本申请的发明人经过大量的研究和实验发现，吸烟的过程本身是一个空气流动的过程，如果流入发烟制品的空气本身温度较高，则热空气可以直接起到烘烤发烟制品的作用，且由于热空气可以随着抽吸过程比较完整均匀地渗透烘烤发烟制品的全部烟草，那么加热不均匀的问题就会得到有效解决。因此，采用对空气进行加热，再利用抽吸过程中热空气流动来烘烤发烟制品的方式来实现加热的方案，整体加热效果会更好。
但是，采用空气加热方案时，首先需要选择合适的发热体来加热空气，而发热体在加热空气时，需要室温空气进入发热体，从发热体出来后的空气温度达到300℃以上；其次，还需要考虑到一般抽吸习惯，即温度上升过程需要支持每秒约20ml，每口抽吸3秒左右，发热体需要共约60ml空气的加热效率。
为达成如上效果，发明人经过大量实验得出，当采用加热丝对空气进行加热的方案时，单依靠加热丝加热空气需要较高的加热丝温度，只有在加热丝的温度达到600℃以上时， 才能将流过的空气加热到300℃以上，且一旦有气流经过时加热丝就会迅速冷却，这样单口抽吸动作就会使加热丝的温度下降幅度达200-300℃。为此，需要在抽吸时对加热丝进行功率补偿，否则难以达到抽吸烟支所需加热空气的效果，然而基于气流传感器检测气流大小来对加热丝的功率进行补偿时，由于加热丝与空气接触面积小，此功率补偿方案不仅需要较高的功率才能达到所需加热效果，同时还存在加热后气体温度不精准、补偿响应不及时而导致各向气温不均匀的问题。
并且，在通过提高加热丝的温度来将流过的空气加热到300℃以上时，由于加热丝的温度增高，可能会导致加热丝分离出的金属离子混入抽吸气流而进入人体，危害人体健康。
综上，本申请的发明人经过大量研究得出，采用空气加热的方案来对发烟制品烘烤时，对空气加热的发热体需要具有较大的加热面积，来减小发热体与空气温差，同时发热体还需要较大的热容来对抗抽吸气流经过后的降温，以及发热体还需要较高的热导率来降低加热准备时间。
为此，申请人基于多年来对陶瓷的深入研究发现，通过设计蜂窝陶瓷的多孔结构可以带来更大的加热表面积，使发热体具有很高的加热空气的效率，同时多孔结构的蜂窝陶瓷发热体更接近实心结构，比同体积的陶瓷管拥有更高的热容，另外氧化铝材料导热率大于30W/MK，可以使热量更迅速更均匀的传导，热导率高，从而，采用多孔结构的蜂窝陶瓷发热体能够满足空气加热的方式来烘烤发烟制品的需求。
本发明的第一个目的在于提出一种可快速均匀升温、发热面大、耗电量小、使用寿命长、保温性能好的陶瓷发热体。
为实现该目的，本发明第一方面实施例提出的陶瓷发热体，包括：蜂窝陶瓷本体，所述蜂窝陶瓷本体内设有多孔通道，所述多孔通道为圆形孔或多边形孔；发热印刷电路，所述发热印刷电路环绕设置在所述蜂窝陶瓷本体的外表面，以对通过所述多孔通道的空气进行加热。
可选地，所述蜂窝陶瓷本体为氧化铝蜂窝陶瓷本体，且所述氧化铝蜂窝陶瓷本体的密度不小于3.86g/cm 3。
可选地，所述多孔通道均匀分布在所述蜂窝陶瓷本体内。
可选地，所述多孔通道设在所述蜂窝陶瓷本体的中心。
可选地，所述蜂窝陶瓷本体为截面是圆形或多边形的柱状体。
具体地，本发明一个实施例提出的氧化铝蜂窝陶瓷发热体，包括氧化铝蜂窝陶瓷本体、发热印刷电路、导线；氧化铝蜂窝陶瓷本体的中心设有多孔通道；所述多孔通道为均匀排布的圆孔或多边形孔；所述发热印刷电路环绕设置在氧化铝蜂窝陶瓷本体的外表面；所述发热印刷电路的首末端设置有导线。
进一步的，所述氧化铝蜂窝陶瓷本体的电阻为0.1～2Ω。
进一步的，所述氧化铝蜂窝陶瓷本体为截面是圆形或方形或多边形的柱状体。
进一步的，所述多孔通道的孔径为0.1～2mm；所述多孔通道的壁厚为0.1～0.5mm。
进一步的，所述发热印刷电路的材料包括但不仅限于银、钨、MoMn，其他适合的印刷电路材料均可。
进一步的，所述发热印刷电路的印刷厚度为0.005～0.05mm。
进一步的，所述导线的材质包括但不仅限于铜、银、镍，其直径为0.1～0.3mm。
根据本发明实施例的陶瓷发热体，使用高纯氧化铝蜂窝陶瓷的表面致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果。高纯氧化铝蜂窝陶瓷的具有良好的导热性，导热率高达33W/m.k，蜂窝陶瓷结构中的的壁厚和孔径均很小，导热效果极其良好，同时蜂窝多孔的形状可以大大的增加与空气的接触面积，氧化铝蜂窝陶瓷的比表面积大，加热效率高，可以更快的实现加热空气的目的。本发明的蜂窝陶瓷加热体设置在待烘烤香烟的下方，与待烘烤香烟不接触，通过使用者抽吸香烟时，底部被蜂窝陶瓷发热体加热的空气与香烟接触，迅速均匀的加热香烟，由于蜂窝多孔的结构存在，使得气体的流动速度得到了一定的限制，热空气与香烟的接触时间更长，减缓了热量的散失，节约了能源。在没有进行抽吸动作时，蜂窝陶瓷的多孔形状同时可以锁住热空气，减少热气体的外流，进一步节约能源。
本发明的第二目的在于提出一种能够烘烤均匀，且不会因为流体中的污染物或发热体直接接触烟弹而污染产品的加热空气式电子烟加热器。
为实现该目的，本发明第二方面实施例提出的加热空气式电子烟加热器，包括上述实施例所述的陶瓷发热体；预加热装置，所述预加热装置的下方设置所述陶瓷发热体。
可选地，所述预加热装置包括预热管，所述预热管与所述陶瓷发热体之间设置有导流片，所述导流片上开设有若干导流孔。
可选地，所述陶瓷发热体和所述预加热装置设置在密封套内。
可选地，所述预加热装置包括用于预热的薄壁氧化铝陶瓷管，所述薄壁氧化铝陶瓷管中心的空腔用于放置发烟制品，所述薄壁氧化铝陶瓷管的一端开口处与底板组合成一杯体，所述底板上开设有若干热气流通孔。
可选地，所述薄壁氧化铝陶瓷管的密度不小于3.86g/cm 3。
可选地，所述底板的中心绕一虚拟圆周上均匀设置有多个热气流通孔，所述热气流通孔为圆孔，其孔径范围为0.1～2mm。
可选地，所述底板的材料为高纯氧化铝陶瓷。
在本发明的一个实施例中，所述的加热空气式电子烟加热器包括预热管和陶瓷发热体， 所述预热管下方设置有陶瓷发热体；所述陶瓷发热体包括蜂窝陶瓷本体和设置在蜂窝陶瓷本体上的发热印刷电路，所述发热印刷电路的端点处设置有导线，所述陶瓷发热体内设置有蜂窝状多孔通道。
进一步的，所述预热管、陶瓷发热体和导流片为高纯氧化铝陶瓷。
进一步的，所述发热印刷电路印刷材料包括但不仅限于银、钨、MoMn。
进一步的，所述导线材料包括但不仅限于银、铜、镍。
进一步的，所述蜂窝状多孔通道为均匀排布的圆形孔或多边形孔，其孔径范围为0.1～2mm，相邻两孔间的最小距离为0.1～0.5mm。
根据本发明实施例的加热空气式电子烟加热器，通过发热体对空气进行加热，使被加热的流动空气均匀的烘烤烟草，使其达到提升烟雾量、吸烟口感好、用户体验佳的效果。同时预热管、发热体和导流片为高纯氧化铝陶瓷，高纯氧化铝陶瓷具有高致密性，在微观结构上几乎没有孔隙，流体中的污染物无法渗透进入其内，无法在表面留下污染和异味，且因为是空气加热的方式不于烟弹接触也能保证装置不受污染。
并且，预加热装置能够实现快速均匀升温，起到预加热和保温的作用。
所述预加热装置包括用于预热的薄壁氧化铝陶瓷管，薄壁氧化铝陶瓷管中心的空腔用于放置发烟制品；所述薄壁氧化铝陶瓷管的一端开口处与底板组合成一杯体；所述底板上开设有若干热气流通孔。
进一步的，所述薄壁氧化铝陶瓷管的密度不小于3.86g/cm 3。
进一步的，所述薄壁氧化铝陶瓷管为薄壁氧化铝陶瓷空心圆管，其壁厚范围为0.1～0.5mm。
进一步的，所述底板的形状与薄壁氧化铝陶瓷管的开口断面形状相配合。
进一步的，所述底板的中心绕一虚拟圆周上均匀设置有多个热气流通孔；所述热气流通孔为圆孔，其孔径范围为0.1～2mm。
进一步的，所述底板的厚度为0.1～0.5mm。
进一步的，所述底板的材料为高纯氧化铝陶瓷。
通过将预加热装置安装在空气加热元件的上方，当加热元件进行加热时，由于底板与薄壁氧化铝陶瓷管均为超薄高纯氧化铝陶瓷，可迅速被加热，达到预热空腔的效果。同时薄壁氧化铝陶瓷管不作为传统的加热部件，可以减少热量的散失。发烟制品的加热通过用户的抽吸动作，从热气流通孔下方的加热部件中抽取热气进行烘烤发烟制品，烘烤效果好，烘烤均匀，热气流通孔一方面可以便于热气的流通，另一方面在不进行抽吸动作时也阻止了热气的直接扩散，具有保温的效果。高纯氧化铝陶瓷材质具有很好的致密性，可以减少烟尘颗粒的吸附，无异味，使用更加安全。
本发明第三个目的在于提出一种陶瓷发热体的制备方法。
为实现该目的，本发明第三方面实施例提出的陶瓷发热体的制备方法，包括以下步骤：
步骤一：氧化铝陶瓷泥料的制备：在100重量份的纳米氧化铝粉中加入，0.01～0.05重量份的硝酸镁、0.01～0.05重量份二氯氧化锆、0.01～0.05重量份硝酸钇、1.5～2.5重量份油酸、1～2重量份润滑剂、3～15重量份粘结剂以及10～30重量份去离子水放入混料机中，在30℃以下温度进行混炼1～5h，制备出分散均匀、固含量为75～85％的氧化铝蜂窝陶瓷泥料备用；
步骤二：氧化铝蜂窝陶瓷的成型：将步骤一制备的氧化铝蜂窝陶瓷泥料加入带真空脱泡装置的螺杆式陶瓷挤出成型机中，陶瓷泥料在螺杆推动下通过模具头挤出成中空、薄壁蜂窝状陶瓷毛坯；
步骤三：氧化铝蜂窝陶瓷毛坯的干燥：将步骤二制备的陶瓷毛坯移至烘箱，在40～50℃热风条件下，干燥脱水5～10分钟，得到外观及直度均符合要求的的陶瓷生坯；
步骤四：氧化铝陶瓷生坯的排胶：将步骤三制备的陶瓷生坯，在1100～1200℃下进行素烧，得到陶瓷素烧坯；
步骤五：氧化铝蜂窝陶瓷的烧制：将步骤四陶瓷素烧坯置于高温钼管中于1600～1800℃下在氢气气氛下或直接在空气中进行烧制，得到氧化铝蜂窝陶瓷；
步骤六：氧化铝蜂窝陶瓷表面加热印刷电路及其导线的制作：将步骤五所制备的氧化铝蜂窝陶瓷，采用丝网印刷技术在其外表面印刷厚膜电热线，待印刷电路干燥后，在焊盘处涂上银焊料将导线粘住，再次进入烘箱烘干，然后将其移至炉中于800～1500℃下烧结，得到一体烧成的导线和印刷电路，同时完成导线在炉中的银钎焊。
可选地，所述步骤一中使用的纳米氧化铝粉纯度大于或等于99.99％，颗粒粒径为350nm，比表面积为7m 2/g。
采用本发明实施例的制备方法制作的氧化铝蜂窝陶瓷的纯度约为99.99％，使其蜂窝陶瓷表面的致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果。高纯氧化铝蜂窝陶瓷的具有良好的导热性，导热率高达33W/m.k，蜂窝陶瓷结构中的壁厚和孔径均很小，导热效果及其良好，同时蜂窝多孔的形状可以大大的增加与空气的接触面积，氧化铝蜂窝陶瓷的比表面积大，加热效率高，可以更快的实现加热空气的目的。本发明的蜂窝陶瓷加热体设置在待烘烤香烟的下方，与待烘烤香烟不接触，通过使用者抽吸香烟时，底部被蜂窝陶瓷发热体加热的空气与香烟接触，迅速均匀的加热香烟，由于蜂窝多孔的结构存在，使得气体的流动速度得到了一定的限制，热空气与香烟的接触时间更长，减缓了热量的散失，节约了能源。在没有进行抽吸动作时，蜂窝陶瓷的多孔形状同时可以锁住热空气，减少热气体的外流，进一步节约能源。
附图说明
图1为根据本发明一个实施例的陶瓷发热体的结构示意图；
图2为根据本发明一个实施例的氧化铝蜂窝陶瓷发热体表面发热印刷电路的平面展开示意图；
图3为根据本发明一个实施例的加热空气式电子烟加热器的结构示意图；
图4为根据本发明另一个实施例的加热空气式电子烟加热器的结构示意图；
图5为根据本发明又一个实施例的加热空气式电子烟加热器的结构示意图；
图6为根据本发明一个实施例的导流片的结构示意图；
图7为根据本发明一个实施例的预加热装置的结构示意图。
具体实施方式
为使本发明实施方式的目的、技术方案和优点更加清楚，下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。因此，以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“上”、“下”、“内”、“外”“前端”、“后端”、“两端”、“一端”、“另一端”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“设有”、“连接”等，应做广义理解，例如“连接”，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
下面就参照附图来描述本发明实施例提出的陶瓷发热体、具有该陶瓷发热体的加热空气式电子烟加热器以及陶瓷发热体的制备方法。
参照图1所示，本发明实施例提出的陶瓷发热体包括蜂窝陶瓷本体1和发热印刷电路2。其中，蜂窝陶瓷本体1内设有多孔通道11，多孔通道11为圆形孔或多边形孔；发热印刷电路2环绕设置在蜂窝陶瓷本体1的外表面，以对通过多孔通道11的空气进行加热。
可选地，作为一个实施例，所述蜂窝陶瓷本体为氧化铝蜂窝陶瓷本体，且所述氧化铝蜂窝陶瓷本体的密度不小于3.86g/cm 3。
可选地，作为一个实施例，所述多孔通道均匀分布在所述蜂窝陶瓷本体内。
可选地，作为一个实施例，所述多孔通道设在所述蜂窝陶瓷本体的中心。
可选地，作为一个实施例，所述蜂窝陶瓷本体为截面是圆形或多边形的柱状体。
现结合附图，详述本发明具体实施方式：
实施例一：
如图1-2所示，本发明提出的一种氧化铝蜂窝陶瓷发热体包括氧化铝蜂窝陶瓷本体1、发热印刷电路2、导线3；氧化铝蜂窝陶瓷本体1的中心设有多孔通道11；所述多孔通道11为均匀排布的方形孔；所述发热印刷电路2环绕设置在氧化铝蜂窝陶瓷本体1的外表面；所述发热印刷电路2的首末端设置有导线3。
进一步的，所述氧化铝蜂窝陶瓷本体1的密度为3.9g/cm 3。
进一步的，所述氧化铝蜂窝陶瓷本体1的电阻为0.6Ω。
进一步的，所述氧化铝蜂窝陶瓷本体1为截面是圆形的柱状体。
进一步的，所述多孔通道11的方形孔孔径为1.5mm，即方形孔边长为1.5mm；所述多孔通道11的壁厚为0.2mm，如图1所示，相邻两方形孔对应边之间的距离即多孔通道11的壁厚。
进一步的，所述发热印刷电路2的材料为银。
进一步的，所述发热印刷电路2的印刷厚度为0.015mm。
进一步的，所述导线3为银导线，其直径为0.2mm。
实施例二：
如图1-2所示，本发明提出的一种氧化铝蜂窝陶瓷发热体包括氧化铝蜂窝陶瓷本体1、发热印刷电路2、导线3；氧化铝蜂窝陶瓷本体1的中心设有多孔通道11；所述多孔通道11为均匀排布的圆孔；所述发热印刷电路2环绕设置在氧化铝蜂窝陶瓷本体1的外表面；所述发热印刷电路2的首末端设置有导线3；
进一步的，所述氧化铝蜂窝陶瓷本体1的密度为3.9g/cm3。
进一步的，所述氧化铝蜂窝陶瓷本体1的电阻为0.8Ω。
进一步的，所述氧化铝蜂窝陶瓷本体1为截面是圆形的柱状体，其中心的多孔通道11为方形孔。
进一步的，所述多孔通道11的圆孔孔径为1.5mm；所述多孔通道11的壁厚为0.2mm，相邻两圆孔间的最小距离即多孔通道11的壁厚。
进一步的，所述发热印刷电路2的材料为银。
进一步的，所述发热印刷电路2的印刷厚度为0.02mm。
进一步的，所述导线3为银导线，其直径为0.2mm。
本实施例中多孔通道11为圆形，对比实施例一，氧化铝蜂窝陶瓷本体1中心的利用率明显没有实施例一的高，其比表面积小于实施例一，加热效率小于实施例一。
本发明的氧化铝蜂窝陶瓷的纯度超过99％，使其蜂窝陶瓷表面的致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果。高纯氧化铝蜂窝陶瓷的具有良好的导热性，导热率高达33W/m.k，蜂窝陶瓷结构中的的壁厚和孔径均很小，导热效果及其良好，同时蜂窝多孔的形状可以大大的增加与空气的接触面积，氧化铝蜂窝陶瓷的比表面积大，加热效率高，可以更快的实现加热空气的目的。
本发明的蜂窝陶瓷加热体设置在待烘烤香烟的下方，与待烘烤香烟不接触，使用者抽吸香烟时，空气从加热体蜂窝的孔洞中流过被加热到特定温度，而后热空气流过烟支将烟支迅速加热到320℃。该方法提高烟体的受热面积和受热效率，加热更均匀，烟丝碳化更完全，避免烟丝浪费，提升了使用者口感，而且不受烟弹种类限制。由于蜂窝多孔的结构存在，使得气体的流动速度得到了一定的限制，热空气与香烟的接触时间更长，减缓了热量的散失，节约了能源。在没有进行抽吸动作时，蜂窝陶瓷的多孔形状同时可以锁住热空气，减少热气体的外流，进一步节约能源。
本发明实施例还提出了一种加热空气式电子烟加热器，如图3所示，该加热空气式电子烟加热器包括上述实施例描述的陶瓷发热体10和预加热装置20。
其中，预加热装置20的下方设置陶瓷发热体10。
可选地，作为一个实施例，所述预加热装置包括预热管，所述预热管与所述陶瓷发热体之间设置有导流片，所述导流片上开设有若干导流孔。
根据本发明的一个实施例，所述陶瓷发热体和所述预加热装置设置在密封套内。
可选地，作为另一个实施例，所述预加热装置包括用于预热的薄壁氧化铝陶瓷管，所述薄壁氧化铝陶瓷管中心的空腔用于放置发烟制品，所述薄壁氧化铝陶瓷管的一端开口处与底板组合成一杯体，所述底板上开设有若干热气流通孔。
其中，所述薄壁氧化铝陶瓷管的密度不小于3.86g/cm 3。
可选地，作为一个实施例，所述底板的中心绕一虚拟圆周上均匀设置有多个热气流通孔，所述热气流通孔为圆孔，其孔径范围为0.1～2mm。
并且，所述底板的材料可以为高纯氧化铝陶瓷。
具体地，作为一个实施例，如图1至图3所示，本发明的加热空气式电子烟加热器包括预热管21和陶瓷发热体10，所述预热管21下方设置有陶瓷发热体10；所述陶瓷发热体10包括蜂窝陶瓷本体1和设置在蜂窝陶瓷本体1上的发热印刷电路2，所述发热印刷电路2的端点处设置有导线3，所述蜂窝陶瓷本体1内设置有蜂窝状多孔通道11。
进一步的，所述预热管21和陶瓷发热体10之间设置有导流片22，所述导流片22上开设有若干导流孔31。
进一步的，所述预热管21和陶瓷发热体10设置在密封套4内。
进一步的，所述预热管21、陶瓷发热体10和导流片22均为高纯氧化铝陶瓷。
进一步的，所述发热印刷电路2印刷材料包括但不仅限于银、钨、MoMn。
进一步的，所述导线2材料包括但不仅限于银、铜、镍。
进一步的，所述蜂窝状多孔通道11为均匀排布的圆形孔或多边形孔，其孔径范围为0.1～2mm，相邻两孔间的最小距离为0.1～0.5mm。
可选地，作为一个实施例，如图3所示，所述预热管21下方设置有陶瓷发热体10，所述预热管21和陶瓷发热体10之间设置有导流片22，所述预热管21和陶瓷发热体10设置在密封套4内，如图1所示，陶瓷发热体10包括蜂窝陶瓷本体1，所述蜂窝陶瓷本体1上设置有发热印刷电路2，所述发热印刷电路2的端点处设置有导线3。当吸烟者需要吸烟时将烟弹放入预热管21中防止烟弹掉落，通电后发热印刷电路2开始发热，由于烟弹在280℃-320℃进行烘烤才能将尼古丁等有效成分烘烤出即可以产生抽吸的烟气，所以装置需要进行预热，当预热管21和导流片22温度达到200℃后预热完成，由于预加热已经完成，在第一、二口抽吸即第一次加热的时候，烟弹只需要从200℃升温到320℃，比从室温升温更快，且更能保证第一、二口产生的烟气量。为了快速加热特将蜂窝陶瓷本体1内设置有蜂窝状多孔通道11且此多孔通道为均匀排布的方形孔或其它多边形孔，其孔径范围为0.1～2mm，相邻两孔间的最小距离为0.1～0.5mm，其展开面积大，因此加热空气效率非常高，而且热空气是从蜂窝中心流过不与发热印刷电路2接触，不会产生污染。由于预热管21、陶瓷发热体10和导流片22为高纯氧化铝陶瓷，高纯氧化铝陶瓷电绝缘性好、强度高、导热性好，因此陶瓷发热体10在加热的时候不会漏电，且预热管21和导流片22也会因为高纯氧化铝陶瓷的良好导热性快速升温，不用等多久便可进行抽吸烟弹；在抽吸烟弹的时候气流通过陶瓷发热体10被加热到320℃，而后经过导流片22上的导流孔31进一步均化和分流，更均匀的流入烟弹中加热烟丝，使其提升烟气量、吸烟口感好、用户体验佳的效果。在吸烟的过程中烟弹飘散出的流体污染物难免会有一些留在装置内，由于高纯氧化铝陶瓷具有高致密性，在微观结构上几乎没有孔隙，流体中的污染物无法渗透进入其内，无法在表面留下污染和异味。在工作过程中，密封套4起到密封作用，保证热空气不会流到其他 地方。
可选地，作为另一个实施例，如图4所示，所述预热管21下方设置有陶瓷发热体10，所述预热管21和陶瓷发热体10设置在密封套4内，如图1所示，陶瓷发热体10包括蜂窝陶瓷本体1，所述蜂窝陶瓷本体1上设置有发热印刷电路2，所述发热印刷电路2的端点处设置有导线3。当吸烟者需要吸烟时将烟弹放入预热管21中防止烟弹掉落，通电后发热印刷电路2开始发热，由于烟弹在280℃-320℃进行烘烤才能将尼古丁等有效成分烘烤出即可以产生抽吸的烟气，所以装置需要进行预热，当预热管21温度达到200℃后预热完成，由于预加热已经完成，在第一、二口抽吸即第一次加热的时候，烟弹只需要从200℃升温到320℃，比从室温升温更快，且更能保证第一、二口产生的烟气量。为了快速加热特将蜂窝陶瓷本体1内设置有蜂窝状多孔通道11且此多孔通道为均匀排布的方形孔或其它多边形孔，其孔径范围为0.1～2mm，相邻两孔间的最小距离为0.1～0.5mm，其展开面积大，因此加热空气效率非常高，而且热空气是从蜂窝中心流过不与发热印刷电路2接触，不会产生污染。由于预热管21和陶瓷发热体10为高纯氧化铝陶瓷，高纯氧化铝陶瓷电绝缘性好、强度高、导热性好，因此陶瓷发热体10在加热的时候不会漏电，且预热管21也会因为高纯氧化铝陶瓷的良好导热性快速升温，不用等多久便可进行抽吸烟弹；在抽吸烟弹的时候气流通过陶瓷发热体10被加热到320℃，当吸烟者开始吸烟时被加热的空气通过陶瓷发热体10流向预热管21，被加热的空气便会流进烟弹内对其内的烟草进行均匀烘烤，使其达到提升烟雾量、吸烟口感好、用户体验佳的效果。在吸烟的过程中烟弹飘散出的流体污染物难免会有一些留在装置内，由于高纯氧化铝陶瓷具有高致密性，在微观结构上几乎没有孔隙，流体中的污染物无法渗透进入其内，无法在表面留下污染和异味。在工作过程中，密封套4起到密封作用，保证热空气不会流到其他地方。
可选地，作为一个实施例，如图5所示，所述预热管21下方设置有陶瓷发热体10，所述预热管21和陶瓷发热体10之间设置有导流片22，如图1所示，陶瓷发热体10包括蜂窝陶瓷本体1，所述蜂窝陶瓷本体1上设置有发热印刷电路2，所述发热印刷电路2的端点处设置有导线3，当吸烟者需要吸烟时将烟弹放入预热管21中防止烟弹掉落，通电后发热印刷电路2开始发热，由于烟弹在280℃-320℃进行烘烤才能将尼古丁等有效成分烘烤出即可以产生抽吸的烟气，所以装置需要进行预热，当预热管21和导流片22温度达到200℃后预热完成，由于预加热已经完成，在第一、二口抽吸即第一次加热的时候，烟弹只需要从200℃升温到320℃，比从室温升温更快，且更能保证第一、二口产生的烟气量。为了快速加热特将蜂窝陶瓷本体1内设置有蜂窝状多孔通道11且此多孔通道为均匀排布的方形孔或其它多边形孔，其孔径范围为0.1～2mm，相邻两孔间的最小距离为0.1～0.5mm，其展开面积大，因此加热空气效率非常高，而且热空气是从蜂窝中心流过不与发热印刷电路2 接触，不会产生污染。由于预热管21、陶瓷发热体10和导流片22为高纯氧化铝陶瓷，高纯氧化铝陶瓷电绝缘性好、强度高、导热性好，因此陶瓷发热体10在加热的时候不会漏电，且预热管21和导流片22也会因为高纯氧化铝陶瓷的良好导热性快速升温，不用等多久便可进行抽吸烟弹；在抽吸烟弹的时候气流通过陶瓷发热体10被加热到320℃，而后经过导流片22上的导流孔31进一步均化和分流，更均匀的流入烟弹中加热烟丝，使其提升烟气量、吸烟口感好、用户体验佳的效果。在吸烟的过程中烟弹飘散出的流体污染物难免会有一些留在装置内，由于高纯氧化铝陶瓷具有高致密性，在微观结构上几乎没有孔隙，流体中的污染物无法渗透进入其内，无法在表面留下污染和异味。
作为一个实施例，如图7所示，预加热装置包括用于预热的薄壁氧化铝陶瓷管21，薄壁氧化铝陶瓷管21中心的空腔210用于放置发烟制品例如烟弹；所述薄壁氧化铝陶瓷管21的一端开口处与底板23组合成一杯体；所述底板23上开设有若干热气流通孔32；所述薄壁氧化铝陶瓷管21的密度不小于3.86g/cm 3；所述薄壁氧化铝陶瓷管21为薄壁氧化铝陶瓷空心圆管，其壁厚为0.2mm；所述底板23的形状与薄壁氧化铝陶瓷管21的开口断面形状相配合；所述底板23的中心绕一虚拟圆周上均匀设置有8个热气流通孔32；所述热气流通孔32为圆孔，其孔径范围为1.5mm；所述底板23的厚度为0.2mm；所述底板23的材料为高纯氧化铝陶瓷。
其中，超薄高纯氧化铝陶瓷的纯度超过99％，使其陶瓷表面的致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果。超薄高纯氧化铝陶瓷的具有良好的导热性，导热率高达33W/m.k，加热效率高，可以更快的实现预热空腔210中空气的目的。
该预热装置是安装在空气加热元件例如陶瓷发热体10的上方，当加热元件进行加热时，由于底板23与薄壁氧化铝陶瓷管21均为超薄高纯氧化铝陶瓷，可迅速被加热，达到预热空腔210的效果。同时薄壁氧化铝陶瓷管21不作为传统的加热部件，可以减少热量的散失。相关技术中的一种加热方案是采用陶瓷加热管直接烘烤发烟制品，其在陶瓷加热管外表面印刷加热电路，通电后，使陶瓷加热管本身的高温来烘烤发烟制品，此种方式的热量利用率低，烘烤烟丝的同时向外释放大量的热，不经济环保。本发明的实施例中，发烟制品的加热通过用户的抽吸动作，从热气流通孔32下方的加热部件中抽取热气进行烘烤发烟制品，烘烤效果好，烘烤均匀，热气流通孔一方面可以便于热气的流通，另一方面在不进行抽吸动作时也阻止了热气的直接扩散，具有保温的效果。高纯氧化铝陶瓷材质具有很好的致密性，可以减少烟尘颗粒的吸附，无异味，使用更加安全。
此外，本发明实施例还提出了一种陶瓷发热体的制备方法，该陶瓷发热体的制备方法包括以下步骤：
步骤一：氧化铝陶瓷泥料的制备：在100重量份的纳米氧化铝粉中加入，0.01～0.05 重量份的硝酸镁、0.01～0.05重量份二氯氧化锆、0.01～0.05重量份硝酸钇、1.5～2.5重量份油酸、1～2重量份润滑剂、3～15重量份粘结剂以及10～30重量份去离子水放入混料机中，在30℃以下温度进行混炼1～5h，制备出分散均匀、固含量为75～85％的氧化铝蜂窝陶瓷泥料备用。
步骤二：氧化铝蜂窝陶瓷的成型：将步骤一制备的氧化铝蜂窝陶瓷泥料加入带真空脱泡装置的螺杆式陶瓷挤出成型机中，陶瓷泥料在螺杆推动下通过模具头挤出成中空、薄壁蜂窝状陶瓷毛坯。
步骤三：氧化铝蜂窝陶瓷毛坯的干燥：将步骤二制备的陶瓷毛坯移至烘箱，在40～50℃热风条件下，干燥脱水5～10分钟，得到外观及直度均符合要求的的陶瓷生坯；
步骤四：氧化铝陶瓷生坯的排胶：将步骤三制备的陶瓷生坯，在1100～1200℃下进行素烧，得到陶瓷素烧坯。
步骤五：氧化铝蜂窝陶瓷的烧制：将步骤四陶瓷素烧坯置于高温钼管中于1600～1800℃下在氢气气氛下或直接在空气中进行烧制，得到氧化铝蜂窝陶瓷。
步骤六：氧化铝蜂窝陶瓷表面加热印刷电路及其导线的制作：将步骤五所制备的氧化铝蜂窝陶瓷，采用丝网印刷技术在其外表面印刷厚膜电热线，待印刷电路干燥后，在焊盘处涂上银焊料将导线粘住，再次进入烘箱烘干，然后将其移至炉中于800～1500℃下烧结，得到一体烧成的导线和印刷电路，同时完成导线在炉中的银钎焊。
可选地，所述步骤一中使用的纳米氧化铝粉纯度大于或等于99.99％，颗粒粒径为350nm，比表面积为7m 2/g。
根据本发明的一个实施例，上述的氧化铝蜂窝陶瓷发热体的制备方法，包括如下步骤：
步骤一、氧化铝陶瓷管泥料的制备：在100重量份的纳米氧化铝粉中加入，0.04重量份的Mg(NO 3) 2·6H 2O、0.04重量份ZrOCl 2·8H 2O、0.01重量份Y(NO 3) 3·6H 2O、2.4重量份油酸、1.2重量份聚乙二醇600、14重量份高纯乙基纤维素醚以及12重量份去离子水放入混料机中，在30℃以下温度进行混炼5h，制备出分散均匀、固含量为75％的氧化铝蜂窝陶瓷泥料备用；
步骤二、氧化铝蜂窝陶瓷的成型：将步骤一制备的氧化铝蜂窝陶瓷泥料加入带真空脱泡装置的螺杆式陶瓷挤出成型机中，陶瓷泥料在螺杆推动下通过模具头挤出成中空、薄壁蜂窝状陶瓷毛坯；
步骤三、氧化铝蜂窝陶瓷毛坯的干燥：将步骤二制备的陶瓷毛坯移至烘箱，在49℃热风条件下，干燥脱水5分钟，得到外观及直度均符合要求的的陶瓷生坯；
步骤四、氧化铝陶瓷生坯管的排胶：将步骤三制备的陶瓷生坯，在1190℃下进行素烧，得到陶瓷素烧坯；
步骤五、氧化铝陶瓷的烧制：将步骤四陶瓷素烧坯置于高温钼管中于1650℃下在氢气气氛下或直接在空气中进行烧制，得到氧化铝蜂窝陶瓷；
步骤六、氧化铝陶瓷管表面加热印刷电路及其导线的制作：将步骤五所制备的氧化铝陶瓷管，采用丝网印刷技术在其外表面印刷厚膜电热线，待印刷电路干燥后，在焊盘处涂上银焊料将导线粘住，再次进入烘箱烘干，然后将其移至常压氢气炉中于800℃下烧结，得到导线共烧氧化铝蜂窝陶瓷本体发热元件，同时完成导线在炉中的银钎焊。
进一步的，步骤一中使用的纳米氧化铝粉纯度大于或等于99.99％，颗粒粒径为350nm，比表面积为7m 2/g。
进一步的，所述氧化铝蜂窝陶瓷本体的密度为3.9g/cm 3。
进一步的，所述氧化铝蜂窝陶瓷本体的电阻为0.6Ω。
进一步的，所述氧化铝蜂窝陶瓷本体为截面是圆形的柱状体，其中心的多孔通道为均匀排布的方形孔。
进一步的，所述多孔通道的方形孔孔径为1.5mm，即方形孔边长为1.5mm；多孔通道的壁厚为0.2mm，如图1所示，相邻两方形孔对应边之间的距离即多孔通道的壁厚。
进一步的，所述发热印刷电路的材料为银。
进一步的，所述发热印刷电路的印刷厚度为0.015mm。
进一步的，所述导线为银导线，其直径为0.2mm。
根据本发明的另一个实施例，上述的氧化铝蜂窝陶瓷发热体的制备方法,包括如下步骤：
步骤一、氧化铝陶瓷管泥料的制备：在100重量份的纳米氧化铝粉中加入，0.02重量份的Mg(NO 3) 2·6H 2O、0.05重量份ZrOCl 2·8H 2O、0.015重量份Y(NO 3) 3·6H 2O、2重量份油酸、1.5重量份聚乙二醇600、8重量份高纯乙基纤维素醚以及20重量份去离子水放入混料机中，在30℃以下温度进行混炼5h，制备出分散均匀、固含量为78％的氧化铝蜂窝陶瓷泥料备用；
步骤二、氧化铝蜂窝陶瓷的成型：将步骤一制备的氧化铝蜂窝陶瓷泥料加入带真空脱泡装置的螺杆式陶瓷挤出成型机中，陶瓷泥料在螺杆推动下通过模具头挤出成中空、薄壁蜂窝状陶瓷毛坯；
步骤三、氧化铝蜂窝陶瓷毛坯的干燥：将步骤二制备的陶瓷毛坯移至烘箱，在49℃热风条件下，干燥脱水5分钟，得到外观及直度均符合要求的的陶瓷生坯；
步骤四、氧化铝陶瓷生坯管的排胶：将步骤三制备的陶瓷生坯，在1190℃下进行素烧， 得到陶瓷素烧坯；
步骤五、氧化铝陶瓷的烧制：将步骤四陶瓷素烧坯置于高温钼管中于1650℃下在氢气气氛下或直接在空气中进行烧制，得到氧化铝蜂窝陶瓷；
步骤六、氧化铝陶瓷管表面加热印刷电路及其导线的制作：将步骤五所制备的氧化铝陶瓷管，采用丝网印刷技术在其外表面印刷厚膜电热线，待印刷电路干燥后，在焊盘处涂上银焊料将导线粘住，再次进入烘箱烘干，然后将其移至常压氢气炉中于800℃下烧结，得到导线共烧氧化铝蜂窝陶瓷本体发热元件，同时完成导线在炉中的银钎焊。
进一步的，所述步骤一中使用的纳米氧化铝粉纯度大于或等于99.99％，颗粒粒径为350nm，比表面积为7m 2/g。
进一步的，所述氧化铝蜂窝陶瓷本体的密度为3.9g/cm 3。
进一步的，所述氧化铝蜂窝陶瓷本体的电阻为0.8Ω。
进一步的，所述氧化铝蜂窝陶瓷本体为截面是圆形的柱状体，其中心的多孔通道为均匀排布的方形孔。
进一步的，所述多孔通道的方形孔孔径为1.5mm，即方形孔边长为1.5mm；所述多孔通道的壁厚为0.2mm，如图1所示，相邻两方形孔对应边之间的距离即多孔通道的壁厚。
进一步的，所述发热印刷电路的材料为银。
进一步的，所述发热印刷电路的印刷厚度为0.02mm。
进一步的，所述导线为银导线，其直径为0.2mm。
本发明的制备方法制作的氧化铝蜂窝陶瓷的纯度超过99％，使其蜂窝陶瓷表面的致密性很高，能有效防止烟尘颗粒吸附，起到防异味的效果。高纯氧化铝蜂窝陶瓷具有良好的导热性，导热率高达33W/m.k，蜂窝陶瓷结构中的壁厚和孔径均很小，导热效果极其良好，同时蜂窝多孔的形状可以大大的增加与空气的接触面积，氧化铝蜂窝陶瓷的比表面积大，加热效率高，可以更快的实现加热空气的目的。
本发明的蜂窝陶瓷发热体设置在待烘烤香烟的下方，与待烘烤香烟不接触，使用者抽吸香烟时，空气从加热体蜂窝的孔洞中流过被加热到特定温度，而后热空气流过烟支将烟支迅速加热到320℃。该方法提高烟体的受热面积和受热效率，加热更均匀，烟丝碳化更完全，避免烟丝浪费，提升了使用者口感，而且不受烟弹种类限制。由于蜂窝多孔的结构存在，使得气体的流动速度得到了一定的限制，热空气与香烟的接触时间更长，减缓了热量的散失，节约了能源。在没有进行抽吸动作时，蜂窝陶瓷的多孔形状同时可以锁住热空气，减少热气体的外流，进一步节约能源。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的， 不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (14)

  1. 一种陶瓷发热体，其特征在于，包括：
    蜂窝陶瓷本体，所述蜂窝陶瓷本体内设有多孔通道，所述多孔通道为圆形孔或多边形孔；
    发热印刷电路，所述发热印刷电路环绕设置在所述蜂窝陶瓷本体的外表面，以对通过所述多孔通道的空气进行加热。
  2. 如权利要求1所述的陶瓷发热体，其特征在于，所述蜂窝陶瓷本体为氧化铝蜂窝陶瓷本体，且所述氧化铝蜂窝陶瓷本体的密度不小于3.86g/cm 3。
  3. 如权利要求1所述的陶瓷发热体，其特征在于，所述多孔通道均匀分布在所述蜂窝陶瓷本体内。
  4. 如权利要求1所述的陶瓷发热体，其特征在于，所述多孔通道设在所述蜂窝陶瓷本体的中心。
  5. 如权利要求1-4中任一项所述的陶瓷发热体，其特征在于，所述蜂窝陶瓷本体为截面是圆形或多边形的柱状体。
  6. 一种加热空气式电子烟加热器，其特征在于，包括：
    如权利要求1-5中任一项所述的陶瓷发热体；
    预加热装置，所述预加热装置的下方设置所述陶瓷发热体。
  7. 如权利要求6所述的加热空气式电子烟加热器，其特征在于，所述预加热装置包括预热管，所述预热管与所述陶瓷发热体之间设置有导流片，所述导流片上开设有若干导流孔。
  8. 如权利要求6所述的加热空气式电子烟加热器，其特征在于，所述陶瓷发热体和所述预加热装置设置在密封套内。
  9. 如权利要求6所述的加热空气式电子烟加热器，其特征在于，所述预加热装置包括用于预热的薄壁氧化铝陶瓷管，所述薄壁氧化铝陶瓷管中心的空腔用于放置发烟制品，所述薄壁氧化铝陶瓷管的一端开口处与底板组合成一杯体，所述底板上开设有若干热气流通孔。
  10. 如权利要求9所述的加热空气式电子烟加热器，其特征在于，所述薄壁氧化铝陶瓷管的密度不小于3.86g/cm 3。
  11. 如权利要求9所述的加热空气式电子烟加热器，其特征在于，所述底板的中心绕一虚拟圆周上均匀设置有多个热气流通孔，所述热气流通孔为圆孔，其孔径范围为0.1～2mm。
  12. 如权利要求9所述的加热空气式电子烟加热器，其特征在于，所述底板的材料为高纯氧化铝陶瓷。
  13. 一种如权利要求1-5中任一项所述的陶瓷发热体的制备方法，其特征在于，包括如下步骤：
    步骤一：氧化铝陶瓷泥料的制备：在100重量份的纳米氧化铝粉中加入，0.01～0.05重量份的硝酸镁、0.01～0.05重量份二氯氧化锆、0.01～0.05重量份硝酸钇、1.5～2.5重量份油酸、1～2重量份润滑剂、3～15重量份粘结剂以及10～30重量份去离子水放入混料机中，在30℃以下温度进行混炼1～5h，制备出分散均匀、固含量为75～85％的氧化铝蜂窝陶瓷泥料备用；
    步骤二：氧化铝蜂窝陶瓷的成型：将步骤一制备的氧化铝蜂窝陶瓷泥料加入带真空脱泡装置的螺杆式陶瓷挤出成型机中，陶瓷泥料在螺杆推动下通过模具头挤出成中空、薄壁蜂窝状陶瓷毛坯；
    步骤三：氧化铝蜂窝陶瓷毛坯的干燥：将步骤二制备的陶瓷毛坯移至烘箱，在40～50℃热风条件下，干燥脱水5～10分钟，得到外观及直度均符合要求的的陶瓷生坯；
    步骤四：氧化铝陶瓷生坯的排胶：将步骤三制备的陶瓷生坯，在1100～1200℃下进行素烧，得到陶瓷素烧坯；
    步骤五：氧化铝蜂窝陶瓷的烧制：将步骤四陶瓷素烧坯置于高温钼管中于1600～1800℃下在氢气气氛下或直接在空气中进行烧制，得到氧化铝蜂窝陶瓷；
    步骤六：氧化铝蜂窝陶瓷表面加热印刷电路及其导线的制作：将步骤五所制备的氧化铝蜂窝陶瓷，采用丝网印刷技术在其外表面印刷厚膜电热线，待印刷电路干燥后，在焊盘处涂上银焊料将导线粘住，再次进入烘箱烘干，然后将其移至炉中于800～1500℃下烧结，得到一体烧成的导线和印刷电路，同时完成导线在炉中的银钎焊。
  14. 如权利要求13所述的陶瓷发热体的制备方法，其特征在于，所述步骤一中使用的纳米氧化铝粉纯度大于或等于99.99％，颗粒粒径为350nm，比表面积为7m 2/g。
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CN207444282U (zh) * 2017-11-17 2018-06-05 深圳市合元科技有限公司 一种加热装置及烟具
CN207505928U (zh) * 2017-11-17 2018-06-19 深圳市合元科技有限公司 一种加热装置及烟具
CN110022622A (zh) * 2019-05-16 2019-07-16 厦门蜂涛陶瓷有限公司 一种氧化铝蜂窝陶瓷发热体及其制备方法
CN210329363U (zh) * 2019-05-16 2020-04-17 厦门蜂涛陶瓷有限公司 一种氧化铝蜂窝陶瓷发热体
CN210329353U (zh) * 2019-05-16 2020-04-17 厦门蜂涛陶瓷有限公司 一种加热空气式电子烟加热器

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CN112430072A (zh) * 2020-11-24 2021-03-02 广东国研新材料有限公司 一种共烧叠层多孔陶瓷发热体及其制备方法
CN113951574A (zh) * 2021-12-02 2022-01-21 云南中烟工业有限责任公司 间接加热的多孔陶瓷发热元件的制备及多孔陶瓷发热元件
TWI839814B (zh) * 2022-08-19 2024-04-21 郭凌凌 空管導流降溫阻隔件及其加工工藝

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