CN115281379A - Co-fired outer wall ceramic bushing atomizing core and porous ceramic atomizing core - Google Patents

Abstract

The invention relates to the technical field of atomizing cores, in particular to a co-fired outer wall ceramic sleeve atomizing core and a porous ceramic atomizing core, comprising a ceramic body, an inner heating wire and a porous ceramic green body. The ceramic body is provided with There are cavities running through the upper surface and the lower surface of the ceramic body, the porous ceramic green body is sleeved on the outer wall of the ceramic body, and the middle part of the inner heating wire is embedded in the ceramic body and wound around the hollow body. In the circumferential direction of the cavity, the end of the inner heating wire protrudes out of the ceramic green body, and the porous ceramic green body is made from the porous ceramic casting slurry. The ceramic sleeve atomizing core of the invention has a simple structure, and the atomizing core obtained by wrapping the porous ceramic green body on the outer wall of the ceramic body and sintering has good consistency, high flexural strength and fast oil absorption, and the ceramic body is directly in contact with the smoke oil. , Fast heat conduction, no need to manually wrap cotton, no oil leakage, cost saving.

Description

A co-fired outer wall ceramic sleeve atomizing core and porous ceramic atomizing core

technical field

The invention relates to the technical field of atomizing cores, in particular to a co-fired outer wall ceramic sleeve atomizing core and a porous ceramic atomizing core.

Background technique

At present, the porous ceramic heating element used in the electronic vaporizer mainly adopts the process of integrally forming the metal heating wire and the porous ceramic substrate. The body cannot directly contact with the e-liquid, which affects the oil absorption speed and slows heat conduction. As for the ceramic atomizing cores with stainless steel tubes and ceramic tubes, the combination of stainless steel tubes, ceramic tubes and ceramics is not very good. Due to their different expansion coefficients during sintering, the gap between the stainless steel tubes, ceramic tubes and ceramics of the sintered product Gaps often occur, and there is a risk of easy oil leakage.

Contents of the invention

In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a co-fired outer wall ceramic casing atomizing core, the ceramic casing atomizing core has a simple structure by wrapping a porous ceramic green body in a ceramic body The atomizing core obtained by sintering the outer wall has good consistency, high flexural strength, and fast oil absorption. The ceramic body is directly in contact with the e-liquid, which has fast heat conduction, no manual cotton wrapping, no oil leakage, and cost savings.

Another object of the present invention is to provide a porous ceramic atomizing core, the porous ceramic atomizing core has a simple structure, the ceramic body and the porous ceramic green body are closely combined, the consistency is good, no oil leakage, and the production cost is low. The atomization efficiency of the atomized liquid is high.

The purpose of the present invention is achieved through the following technical solutions: a co-fired outer wall ceramic sleeve atomization core, including a ceramic body, an inner heating wire and a porous ceramic green body, the ceramic body is provided with a hole that penetrates the ceramic body The cavity on the upper surface and the lower surface, the porous ceramic green body is sleeved on the outer wall of the ceramic body, the middle part of the inner heating wire is embedded in the ceramic body and wound around the circumference of the cavity, and the inner The end of the heating wire protrudes out of the ceramic green body, and the porous ceramic green body is made of porous ceramic casting slurry.

The ceramic casing atomizing core in the present invention has a simple structure, and the atomizing core obtained by wrapping the porous ceramic green body on the outer wall of the ceramic body and sintering has good consistency, high flexural strength, and fast oil absorption. Contact, fast heat conduction, no need for manual cotton wrapping, no oil leakage, cost saving, high heating efficiency of the inner heating wire to the ceramic body during atomization, which can improve the atomization efficiency of the ceramic casing atomization core to the atomization liquid be greatly improved.

Preferably, the porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 20-60 parts of diatomite, 30-60 parts of silicon dioxide, 30-60 parts of quartz sand, 0-35 parts of pore-forming agent, and 10-30 parts of glass powder;

Component B: 20-50 parts of PVB, 10-30 parts of DBP, 10-20 parts of sesame oil, 50-90 parts of absolute ethanol, and 50-90 parts of butanone.

More preferably, the porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 30-60 parts of diatomite, 30-60 parts of silicon dioxide, 30-60 parts of quartz sand, 0-35 parts of pore-forming agent, 10-30 parts of glass powder;

Component B: 20-50 parts of PVB, 10-30 parts of DBP, 10-20 parts of sesame oil, 50-90 parts of absolute ethanol, 50-90 parts of methyl ethyl ketone; among them, components A and B are based on the weight ratio Mix for 0.4-0.9:0.1-0.6.

The porous ceramic green body in the present invention is made of porous ceramic casting slurry, and the porous ceramic green body made of the porous ceramic casting slurry composed of the above raw materials has a good shrinkage rate, and the porous ceramic green body is sintered during sintering. The shrinkage rate of the ceramic of the blank is consistent with that of the porous ceramic green body, which can well ensure that the final sintered ceramic body of the atomizing core and the porous ceramic green body are closely bonded, with good consistency and no oil leakage. The glass powder and diatomite used therein have the advantages of firmness, wear resistance, high temperature resistance, wide source, and low cost. Adding them to the raw materials of the porous ceramic casting slurry can ensure the strength and toughness of the porous ceramic obtained by sintering; Diatomaceous earth and silicon oxide as ceramic bone powder have the advantages of firmness, wear resistance, high temperature resistance, wide source, and low cost, which can ensure the strength and toughness of the atomizing core; and the addition of pore-forming agents can make the sintered atomized The core has the advantages of good strength, high porosity, small pore size and uniform distribution; B component is an organic carrier, which can be used as A component carrier to float A component during preparation, and at the same time It can increase the toughness of the slurry of the porous ceramic casting green body, and is beneficial to the defoaming treatment.

Preferably, the pore-forming agent is one or more of graphite, carbon powder, PMMA, and starch.

In the present invention, by using the pore-forming agent of the above-mentioned specific raw materials, the sintered atomizing core can have better strength, higher porosity, small pore size, and uniform distribution. In addition, most of the pores formed are columnar pores. , the porosity is high, and the atomization core also enhances its bonding due to the columnar pore structure.

Preferably, the mesh number of the diatomite is 350-550 mesh, the mesh number of the silicon oxide is 300-600 mesh, the mesh number of the quartz sand is 400-600 mesh, and the mesh number of the glass powder It is 800-4000 mesh.

Preferably, the porous ceramic green body is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and butanone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 60 Stir evenly at -150°C to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Casting the porous ceramic casting green body slurry degassed in step S3, controlling the speed of the casting machine to 5-20 mm/s, and obtaining a porous ceramic green body after casting.

The porous ceramic green body in the present invention is obtained by the above method, and the porous ceramic green body obtained by the above method has good shrinkage, porosity and high strength after sintering; Centrifugal stirring, vacuuming or static means can effectively avoid bubbles or cracks during sintering after degassing, and further improve the comprehensive performance of the co-fired outer wall ceramic casing atomizing core made of the porous ceramic green body .

Preferably, the co-fired outer wall ceramic sleeve atomizing core is made through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body into required substrates, and setting at least one oil guide hole on the substrates for standby;

2) Wrapping: Wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is processed by isostatic pressure, the pressure during processing is 5-20MPa, the temperature is 50-70°C, the holding time is 450-550s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed at a temperature of 600-900°C for standby;

5) Sintering: Sinter the semi-finished product after dewaxing, place it in a reducing atmosphere at a temperature of 600-1050°C for 30-180min in the high-temperature section, heat preservation and sintering for 30-180min, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic sleeve atomizing core .

In the present invention, the atomizing core obtained by wrapping the porous ceramic green body on the outer wall of the ceramic body for sintering has good consistency, high flexural strength, and fast oil absorption. Since the shrinkage rate of the substrate and the ceramic body are consistent during sintering, the base can be made The integrated yield of the chip and the ceramic body makes the final atomization core substrate and the ceramic body tightly bonded, avoiding the disadvantages of gaps or cracks when stainless steel tubes, ceramic tubes and ceramics are combined in the past, and the production The process is simple and the efficiency is high, which can further improve the practicability of the atomizing core and reduce the production cost.

The present invention also provides a porous ceramic atomizing core, which is prepared by using the co-fired outer wall ceramic sleeve atomizing core.

The porous ceramic atomizing core in the present invention has a simple structure, and the ceramic body and the porous ceramic green body are closely combined, have good consistency, no oil leakage, low production cost, and high atomization efficiency for atomizing liquid.

The beneficial effects of the present invention are: the ceramic sleeve atomizing core of the present invention has a simple structure, and the atomizing core obtained by wrapping the porous ceramic green body on the outer wall of the ceramic body and sintering has good consistency, high flexural strength, fast oil absorption, and The green body is in direct contact with the e-liquid, which has fast heat conduction, no manual cotton wrapping, no oil leakage, and cost saving.

The porous ceramic atomizing core of the present invention has a simple structure, tight connection between the ceramic body and the porous ceramic green body, good consistency, no oil leakage, low production cost, and high atomization efficiency for the atomized liquid.

Description of drawings

Fig. 1 is the exploded schematic view of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of the present invention.

The reference signs are: 1-ceramic green body, 11-cavity, 2-inner heating wire and 3-porous ceramic green body.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings 1-2, and the contents mentioned in the implementation modes are not intended to limit the present invention.

Example 1

A co-fired outer wall ceramic casing atomizing core, comprising a ceramic body 1, an inner heating wire 2 and a porous ceramic green body 3, the ceramic body 1 is provided with a Cavity 11, the porous ceramic green body 3 is sleeved on the outer wall of the ceramic body 1, the middle part of the inner heating wire 2 is embedded in the ceramic body 1 and wound around the circumference of the cavity 11, The end of the inner heating wire 2 protrudes out of the ceramic green body 1, and the porous ceramic green body 3 is made of porous ceramic casting slurry.

The porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 20 parts of diatomite, 30 parts of silicon dioxide, 30 parts of quartz sand, 0.01 part of pore-forming agent, and 10 parts of glass powder;

Component B: 20 parts of PVB, 10 parts of DBP, 10 parts of sesame oil, 50 parts of absolute ethanol, 50 parts of butanone;

Wherein, component A and component B are mixed in a weight ratio of 0.4:0.1.

The pore forming agent is graphite.

The mesh number of the diatomite is 350 mesh, the mesh number of the silicon oxide is 300 mesh, the mesh number of the quartz sand is 400 mesh, and the mesh number of the glass powder is 800 mesh.

The porous ceramic green body 3 is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and butanone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 60 Stir evenly at ℃ to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Cast the porous ceramic casting green body slurry degassed in step S3, and control the speed of the casting machine to 5 mm/s, and obtain a porous ceramic green body 3 after casting.

The co-fired outer wall ceramic casing atomizing core is prepared through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body 3 into required substrates, and setting at least one oil guide hole on the substrates for future use;

2) Wrapping: wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body 1 obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is processed by isostatic pressing, the pressure during processing is 5MPa, the temperature is 50°C, and the holding time is 450s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed at a temperature of 600°C for standby;

5) Sintering: Sinter the semi-finished product after dewaxing, place it in a reducing atmosphere at a temperature of 600°C in a high temperature section for sintering for 30 minutes, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic casing atomizing core.

A porous ceramic atomizing core, which is prepared by the above-mentioned co-fired outer wall ceramic sleeve atomizing core.

Example 2

A co-fired outer wall ceramic casing atomizing core, comprising a ceramic body 1, an inner heating wire 2 and a porous ceramic green body 3, the ceramic body 1 is provided with a Cavity 11, the porous ceramic green body 3 is sleeved on the outer wall of the ceramic body 1, the middle part of the inner heating wire 2 is embedded in the ceramic body 1 and wound around the circumference of the cavity 11, The end of the inner heating wire 2 protrudes out of the ceramic green body 1, and the porous ceramic green body 3 is made of porous ceramic casting slurry.

The porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 30 parts of diatomite, 38 parts of silicon dioxide, 38 parts of quartz sand, 8 parts of pore-forming agent, and 15 parts of glass powder;

Component B: 27 parts of PVB, 15 parts of DBP, 13 parts of sesame oil, 60 parts of absolute ethanol, 60 parts of butanone;

Wherein, component A and component B are mixed according to a weight ratio of 0.5:0.2.

The pore forming agent is carbon powder.

The mesh number of the diatomite is 400 mesh, the mesh number of the silicon oxide is 380 mesh, the mesh number of the quartz sand is 450 mesh, and the mesh number of the glass powder is 1400 mesh.

The porous ceramic green body 3 is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and methyl ethyl ketone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 85 Stir evenly at ℃ to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Cast the porous ceramic casting green body slurry degassed in step S3, control the speed of the casting machine to 8mm/s, and obtain the porous ceramic green body 3 after casting.

The co-fired outer wall ceramic casing atomizing core is prepared through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body 3 into required substrates, and setting at least one oil guide hole on the substrates for future use;

2) Wrapping: wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body 1 obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is processed by isostatic pressing, the pressure during processing is 8MPa, the temperature is 55°C, the holding time is 475s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed at a temperature of 670°C for standby;

5) Sintering: Sinter the semi-finished product after dewaxing, place it in a reducing atmosphere at a temperature of 700°C in a high temperature section for sintering for 60 minutes, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic sleeve atomizing core.

A porous ceramic atomizing core, which is prepared by the above-mentioned co-fired outer wall ceramic sleeve atomizing core.

Example 3

A co-fired outer wall ceramic casing atomizing core, comprising a ceramic body 1, an inner heating wire 2 and a porous ceramic green body 3, the ceramic body 1 is provided with a Cavity 11, the porous ceramic green body 3 is sleeved on the outer wall of the ceramic body 1, the middle part of the inner heating wire 2 is embedded in the ceramic body 1 and wound around the circumference of the cavity 11, The end of the inner heating wire 2 protrudes out of the ceramic green body 1, and the porous ceramic green body 3 is made of porous ceramic casting slurry.

The porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 40 parts of diatomite, 45 parts of silicon dioxide, 45 parts of quartz sand, 17 parts of pore-forming agent, and 20 parts of glass powder;

Component B: 35 parts of PVB, 20 parts of DBP, 15 parts of sesame oil, 70 parts of absolute ethanol, 70 parts of butanone;

Wherein, component A and component B are mixed according to the weight ratio of 0.6:0.3.

The pore forming agent is starch.

The mesh number of the diatomite is 450 mesh, the mesh number of the silicon oxide is 450 mesh, the mesh number of the quartz sand is 500 mesh, and the mesh number of the glass powder is 2000 mesh.

The porous ceramic green body 3 is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and butanone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 105 Stir evenly at ℃ to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Cast the porous ceramic casting green body slurry degassed in step S3, and control the speed of the casting machine to 13 mm/s, and obtain a porous ceramic green body 3 after casting.

The co-fired outer wall ceramic casing atomizing core is prepared through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body 3 into required substrates, and setting at least one oil guide hole on the substrates for future use;

2) Wrapping: wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body 1 obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is processed by isostatic pressure, the pressure during processing is 13MPa, the temperature is 60°C, and the pressure holding time is 500s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed, and the temperature during the treatment is 750°C, and it is set aside;

5) Sintering: Sinter the semi-finished product after dewaxing, place it in a reducing atmosphere at a temperature of 800°C in a high-temperature section for heat preservation and sintering for 100 minutes, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic sleeve atomizing core.

A porous ceramic atomizing core, which is prepared by the above-mentioned co-fired outer wall ceramic sleeve atomizing core.

Example 4

A co-fired outer wall ceramic casing atomizing core, comprising a ceramic body 1, an inner heating wire 2 and a porous ceramic green body 3, the ceramic body 1 is provided with a Cavity 11, the porous ceramic green body 3 is sleeved on the outer wall of the ceramic body 1, the middle part of the inner heating wire 2 is embedded in the ceramic body 1 and wound around the circumference of the cavity 11, The end of the inner heating wire 2 protrudes out of the ceramic green body 1, and the porous ceramic green body 3 is made of porous ceramic casting slurry.

The porous ceramic casting slurry includes the following raw materials in parts by weight:

A component: 50 parts of diatomite, 52 parts of silicon dioxide, 52 parts of quartz sand, 25 parts of pore-forming agent, and 25 parts of glass powder;

Component B: 42 parts of PVB, 25 parts of DBP, 18 parts of sesame oil, 80 parts of absolute ethanol, 80 parts of butanone;

Wherein, component A and component B are mixed according to the weight ratio of 0.8:0.5.

The pore forming agent is PMMA.

The mesh number of the diatomite is 500 mesh, the mesh number of the silicon oxide is 520 mesh, the mesh number of the quartz sand is 550 mesh, and the mesh number of the glass powder is 3000 mesh.

The porous ceramic green body 3 is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and butanone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 120 Stir evenly at ℃ to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Cast the porous ceramic casting green body slurry degassed in step S3, and control the speed of the casting machine to 16 mm/s, and obtain a porous ceramic green body 3 after casting.

The co-fired outer wall ceramic casing atomizing core is prepared through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body 3 into required substrates, and setting at least one oil guide hole on the substrates for future use;

2) Wrapping: Wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body 1 obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is processed by isostatic pressure, the pressure during processing is 16MPa, the temperature is 65°C, and the pressure holding time is 575s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed, and the temperature during the treatment is 820°C, and it is set aside;

5) Sintering: Sinter the semi-finished product after wax removal, place it in a reducing atmosphere at a temperature of 900°C in a high-temperature section for heat preservation and sintering for 140 minutes, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic sleeve atomizing core.

A porous ceramic atomizing core, which is prepared by the above-mentioned co-fired outer wall ceramic sleeve atomizing core.

Example 5

A co-fired outer wall ceramic casing atomizing core, comprising a ceramic body 1, an inner heating wire 2 and a porous ceramic green body 3, the ceramic body 1 is provided with a Cavity 11, the porous ceramic green body 3 is sleeved on the outer wall of the ceramic body 1, the middle part of the inner heating wire 2 is embedded in the ceramic body 1 and wound around the circumference of the cavity 11, The end of the inner heating wire 2 protrudes out of the ceramic green body 1, and the porous ceramic green body 3 is made of porous ceramic casting slurry.

The porous ceramic casting slurry includes the following raw materials in parts by weight:

Component A: 60 parts of diatomite, 60 parts of silicon dioxide, 60 parts of quartz sand, 35 parts of pore-forming agent, and 30 parts of glass powder;

Component B: 50 parts of PVB, 30 parts of DBP, 20 parts of sesame oil, 90 parts of absolute ethanol, 90 parts of butanone;

Wherein, component A and component B are mixed according to the weight ratio of 0.9:0.6.

The pore-forming agent is a mixture composed of graphite, carbon powder and PMMA in a weight ratio of 0.7:0.6:0.8.

The mesh number of the diatomite is 550 mesh, the mesh number of the silicon oxide is 600 mesh, the mesh number of the quartz sand is 600 mesh, and the mesh number of the glass powder is 4000 mesh.

The porous ceramic green body 3 is prepared through the following steps:

S1. Mix and stir diatomite, silicon dioxide, quartz sand, pore-forming agent and glass powder according to parts by weight to obtain component A, which is set aside;

S2. According to parts by weight, mix and stir PVB, DBP, sesame oil, absolute ethanol and butanone evenly to obtain component B, then add component B to component A obtained in step S1 and mix, and heat to 150 Stir evenly at ℃ to obtain the porous ceramic casting green body slurry to be formed, and set aside;

S3. Degassing the porous ceramic cast green body slurry obtained in step S2;

S4. Cast the porous ceramic casting green body slurry degassed in step S3, control the speed of the casting machine to 20mm/s, and obtain the porous ceramic green body 3 after casting.

The co-fired outer wall ceramic casing atomizing core is prepared through the following steps:

1) Cutting pieces: cutting the prepared porous ceramic green body 3 into required substrates, and setting at least one oil guide hole on the substrates for future use;

2) Wrapping: Wrapping the substrate in step 1) on the outer surface of the plain embryo of the ceramic body 1 obtained by injection or hot die-casting to obtain a semi-finished product for use;

3) Molding: The semi-finished product in step 2) is subjected to isostatic pressure treatment, the pressure during treatment is 20MPa, the temperature is 70°C, and the pressure holding time is 550s, and it is ready for use;

4) Degumming: The semi-finished product after isostatic pressing is degummed, and the temperature during the treatment is 900°C, and it is used for standby;

5) Sintering: Sinter the semi-finished product after dewaxing, place it in a reducing atmosphere at a temperature of 1050°C in a high-temperature section for sintering for 180 minutes, take it out of the furnace, and cool it to obtain a co-fired outer wall ceramic sleeve atomizing core.

A porous ceramic atomizing core, which is prepared by the above-mentioned co-fired outer wall ceramic sleeve atomizing core.

Comparative example 1

The difference between this comparative example and the above-mentioned Example 3 is that no diatomaceous earth and silicon dioxide are added to the raw materials of the porous ceramic casting slurry in this comparative example. The remaining content of this comparative example is the same as that of Embodiment 3, and will not be repeated here.

Comparative example 2

The difference between this comparative example and the above-mentioned Example 5 is that no component B is added to the raw material of the porous ceramic casting slurry in this comparative example. The remaining content of this comparative example is the same as that of Embodiment 5, and will not be repeated here.

Comparative example 3

The difference between this comparative example and the above-mentioned Example 5 is that no PVB and DBP are added to the raw materials of the porous ceramic casting slurry in this comparative example. The remaining content of this comparative example is the same as that of Embodiment 3, and will not be repeated here.

The porous ceramic atomizing cores prepared in Examples 1, 3, 5 and Comparative Examples 1-3 were tested for performance, and the results are shown in Table 1:

Expansion coefficient detection adopts PCY-1200 high temperature thermal expansion tester;

The heat shrinkage test is carried out on the ceramic green body according to the method specified in QB/T1548-2015;

Binding was observed under a magnifying glass.

Table 1

From the comparison of Example 1, Example 3 and Example 5, it can be seen that the atomizing core prepared by the present invention has the advantages of good expansion coefficient, low shrinkage rate, and good bonding between the substrate and the ceramic body 1 .

From the comparison of Examples 1, 3 and 5 and Comparative Examples 1-3, it can be seen that the atomizing core prepared by using the porous ceramic casting slurry added with diatomaceous earth, silicon dioxide and component B has good expansion The coefficient and the shrinkage rate are low, and the combination of the substrate and the ceramic body 1 is good and the like.

The above-mentioned embodiments are preferred implementation solutions of the present invention. In addition, the present invention can also be realized in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the present invention.

Claims (10)

1. The utility model provides a type of burn altogether outer wall ceramic bushing atomizing core which characterized in that: including ceramic body, interior heater and porous ceramic unburned bricks, ceramic body is provided with the cavity that runs through ceramic body's upper surface and lower surface, ceramic body's outer wall is located to the porous ceramic unburned bricks cover, the middle part of interior heater is inlayed and is located the internal and the going round circumference of locating the cavity of ceramic body, the tip of interior heater is stretched out ceramic body outstandingly, the porous ceramic unburned bricks is made by porous ceramic curtain coating thick liquids.

2. The co-fired outer wall ceramic bushing atomizing core of claim 1, wherein: the porous ceramic tape-casting slurry comprises the following raw materials in parts by weight:

the component A comprises: 20-60 parts of diatomite, 30-60 parts of silicon dioxide, 30-60 parts of quartz sand, 0-35 parts of pore-forming agent and 10-30 parts of glass powder;

and the component B comprises: 20-50 parts of PVB, 10-30 parts of DBP, 10-20 parts of sesame oil, 50-90 parts of absolute ethyl alcohol and 50-90 parts of butanone.

3. The co-fired outer wall ceramic bushing atomizing core of claim 2, wherein: the porous ceramic tape-casting slurry comprises the following raw materials in parts by weight:

the component A comprises: 30-60 parts of diatomite, 30-60 parts of silicon dioxide, 30-60 parts of quartz sand, 0-35 parts of pore-forming agent and 10-30 parts of glass powder;

and B component: 20-50 parts of PVB, 10-30 parts of DBP, 10-20 parts of sesame oil, 50-90 parts of absolute ethyl alcohol and 50-90 parts of butanone;

wherein, the component A and the component B are mixed according to the weight ratio of 0.4-0.9.

4. The co-fired outer wall ceramic bushing atomizing core of claim 2, wherein: the pore-forming agent is one or more of graphite, carbon powder, PMMA and starch.

5. The co-fired outer wall ceramic bushing atomizing core of claim 2, wherein: the mesh number of the diatomite is 350-550 meshes, the mesh number of the silicon oxide is 300-600 meshes, the mesh number of the quartz sand is 400-600 meshes, and the mesh number of the glass powder is 800-4000 meshes.

6. The co-fired outer wall ceramic bushing atomizing core of claim 2, wherein: the porous ceramic green body is prepared by the following steps:

s1, mixing and stirring diatomite, silicon dioxide, quartz sand, a pore-forming agent and glass powder uniformly according to parts by weight to obtain a component A for later use;

s2, mixing and stirring PVB, DBP, sesame oil, absolute ethyl alcohol and butanone uniformly according to parts by weight to obtain a component B, adding the component B into the component A obtained in the step S1, mixing, heating to 60-150 ℃, and stirring uniformly to obtain porous ceramic casting green body slurry to be formed for later use;

s3, defoaming the porous ceramic tape-casting green slurry to be molded obtained in the step S2;

and S4, casting the porous ceramic casting green body slurry subjected to defoaming in the step S3, controlling the speed of the casting machine to be 5-20mm/S, and casting to obtain the porous ceramic green body.

7. A co-fired outer wall ceramic bushing atomizing core as set forth in any one of claims 1-6, wherein: the co-fired outer wall ceramic bushing atomizing core is prepared by the following steps:

1) Cutting: cutting the prepared porous ceramic green body into a required substrate, and arranging at least one oil guide hole on the substrate for later use;

2) And (3) wrapping: wrapping the substrate obtained in the step 1) on the outer surface of a blank of a ceramic blank obtained by injection or hot-press casting molding to obtain a semi-finished product for later use;

3) Molding: carrying out isostatic pressing treatment on the semi-finished product in the step 2) for later use;

4) Rubber discharging: carrying out glue discharging treatment on the semi-finished product subjected to isostatic pressing for later use;

5) And (3) sintering: and sintering the dewaxed semi-finished product, sintering at a high temperature under a reducing atmosphere, discharging, and cooling to obtain the co-fired outer wall ceramic bushing atomizing core.

8. The co-fired outer wall ceramic bushing atomizing core of claim 7, wherein: in the step 3), the pressure during isostatic pressing treatment is 5-20MPa, the temperature is 50-70 ℃, and the pressure maintaining time is 450-550s.

9. The co-fired outer wall ceramic bushing atomizing core of claim 7, wherein: in the step 4), the temperature for glue discharging treatment is 600-900 ℃; in the step 5), the high-temperature sintering is carried out for 30-180min at a high temperature section under the condition of 600-1050 ℃.

10. A porous ceramic atomizing core characterized by: the porous ceramic atomizing core is prepared by adopting the co-fired outer wall ceramic bushing atomizing core as set forth in any one of claims 1-6.

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