CN115215676A

CN115215676A - Porous ceramic material, manufacturing method, porous ceramic and application

Info

Publication number: CN115215676A
Application number: CN202110408028.9A
Authority: CN
Inventors: 齐会龙; 聂革; 宋文正; 胡勇齐; 李俊辉
Original assignee: Shenzhen Woody Vapes Technology Co Ltd
Current assignee: Shenzhen Woody Vapes Technology Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-10-21
Also published as: WO2022217932A1

Abstract

The invention discloses a porous ceramic material, a manufacturing method, porous ceramic and application. The porous ceramic material comprises ceramic powder and a binder; the ceramic powder accounts for 55-80% by mass, and the balance is the binder. According to the manufacturing method of the porous ceramic, the porous ceramic material is adopted, the porous ceramic is manufactured through injection molding, inorganic powder does not need to be used for landfill high-temperature degreasing, the porous ceramic does not need to be cleaned, manpower and material resources are saved, the ceramic is not easy to damage, an aerosol generating device adopting the porous ceramic has no risk of powder falling, the safety is good, a metal heating circuit is not easy to fall off, and the risk of core pasting is small.

Description

Porous ceramic material, manufacturing method, porous ceramic and application

Technical Field

The invention relates to the field of porous ceramic manufacturing, in particular to a porous ceramic material, a manufacturing method, porous ceramic and application.

Background

Aerosol generating devices are used to generate aerosols, which are often atomized using a porous ceramic atomizing wick. The porous ceramic atomizing core is made of porous ceramic. At present, in the process of manufacturing porous ceramics for aerosol generating devices, after molding, inorganic powder is used for filling and high-temperature degreasing of molded bodies. The capillary formed by the inorganic powder is beneficial to degreasing, promotes the discharge of part of liquid-phase organic matters and the separation of decomposition products of organic materials, and on the other hand, the inorganic powder helps the formed body to maintain the shape of the formed body, so that the deformation and collapse of the blank body caused by the self gravity and the separation of the organic matters are avoided.

However, the inorganic powder landfill process has many disadvantages: (1) Inorganic powder needs to be cleaned after degreasing, time and labor are consumed, and the ceramic is easily damaged in the cleaning process; (2) Inorganic powder is adhered to the surface of the ceramic due to physical and chemical effects, so that the ceramic is difficult to clean; inorganic powder which cannot be completely removed has the risk of powder falling on the aerosol generating device, so that great potential safety hazards are brought to users; (3) Inorganic powder is stuck on the ceramic to influence the taste of the aerosol generating device, and meanwhile, the metal heating circuit on the surface of the ceramic is easy to fall off, so that the risk of core pasting is high.

Disclosure of Invention

The invention aims to provide a porous ceramic material, a manufacturing method, porous ceramic and application, so as to overcome the defects of the conventional porous ceramic manufacturing process and the porous ceramic.

The invention discloses a porous ceramic material, which comprises ceramic powder and a binder; the ceramic powder accounts for 55-80% by mass, and the balance is the binder.

Optionally, the ceramic powder comprises the following components in percentage by mass: 30-70% of diatomite, 1-20% of quartz sand, 1-20% of glass powder, 10-50% of pore-forming agent, 1-20% of kaolin, 0-10% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-15% of talc, 0-15% of feldspar, 0-10% of sepiolite and 0-5% of bentonite.

Optionally, the ceramic powder comprises the following components in percentage by mass: 40-50% of diatomite, 5-10% of quartz sand, 5-10% of glass powder, 20-30% of pore-forming agent, 5-10% of kaolin, 2-5% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-10% of talc, 2-10% of feldspar, 0-5% of sepiolite and 0-5% of bentonite.

Optionally, the binder comprises the following components in percentage by mass: 30-75% of paraffin, 1-20% of beeswax, 2-35% of low-density polyethylene, 1-10% of stearic acid, 0-5% of vegetable oil and 0-10% of plasticizer.

Optionally, the binder comprises the following components in percentage by mass: 50-60% of paraffin, 5-10% of beeswax, 15-20% of low-density polyethylene, 5-10% of stearic acid, 2-5% of vegetable oil and 3-8% of plasticizer.

The invention also discloses a manufacturing method of the porous ceramic, which comprises the following steps:

step 1: weighing the ceramic powder and the binder in proportion;

step 2: heating the binder in the step 1 to be in a molten state, and adding the ceramic powder in the step 1 for mixing to obtain a premixed material;

and 3, step 3: granulating the premixed material obtained in the step 2, and then performing injection molding to obtain an injection molding blank;

and 4, step 4: and (4) degreasing and sintering the injection molding blank body in the step (3) to obtain the porous ceramic.

Optionally, the step 2 specifically includes:

heating the binder in the step 1 to 70-170 ℃, and banburying, kneading or stirring to enable the binder to be in a molten state;

adding the ceramic powder obtained in the step (1) and mixing for 2-5 h to obtain a premixed material.

Optionally, step 4 specifically includes:

heating the sintering temperature from room temperature to 250 ℃, and preserving heat, wherein the heating time is 730min, and the heat preservation time is 240min;

heating the sintering temperature from 250 ℃ to 350 ℃, and preserving heat, wherein the heating time is 300min, and the heat preservation time is 60min;

heating the sintering temperature from 350 ℃ to 500 ℃, and preserving heat, wherein the heating time is 150min, and the heat preservation time is 60min;

heating the sintering temperature from 500 ℃ to 900 ℃ for 120min;

heating the sintering temperature from 900 ℃ to 1100 ℃, and preserving the heat, wherein the heating time is 120min, and the heat preservation time is 120min;

and (4) reducing the sintering temperature from 1100 ℃ to room temperature to finish sintering.

The invention also discloses a porous ceramic which is prepared by the preparation method.

The invention also discloses application of the porous ceramic in an aerosol generating device.

According to the manufacturing method of the porous ceramic, the porous ceramic material is adopted, the porous ceramic is manufactured through injection molding, inorganic powder does not need to be used for landfill high-temperature degreasing, the porous ceramic does not need to be cleaned, manpower and material resources are saved, the ceramic is not easy to damage, an aerosol generating device adopting the porous ceramic has no powder falling risk, the safety is good, a metal heating circuit is not easy to fall off, and the risk of core pasting is small.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a flow chart of a method of making a porous ceramic according to an embodiment of the present invention;

FIG. 2 is a graph showing a thermal analysis of an injection-molded body according to an embodiment of the present invention.

Detailed Description

To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:

example 1

A porous ceramic material comprises ceramic powder and a binder; the ceramic powder accounts for 55-80% by mass, and the balance is the binder.

The porous ceramic material is used for manufacturing the porous ceramic for the sol device, realizes a powder embedding-free degreasing process, has high solid content and high sintering strength, is not easy to damage, has no risk of powder falling, has high safety, has good taste of the aerosol generating device, is not easy to fall off a metal heating circuit on the surface of the ceramic, and has small risk of core pasting.

In this embodiment, the ceramic powder accounts for 55-80% of the total mass of the porous ceramic material, the ceramic powder has a solid content, a high solid content is beneficial to maintaining the shape without collapsing and deforming in the degreasing process, but an excessively high solid content is not beneficial to injection molding, so the ceramic powder is selected to be 55-80%.

Specifically, the ceramic powder comprises the following components in percentage by mass: 30-70% of diatomite, 1-20% of quartz sand, 1-20% of glass powder, 10-50% of pore-forming agent, 1-20% of kaolin, 0-10% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-15% of talc, 0-15% of feldspar, 0-10% of sepiolite and 0-5% of bentonite.

In this scheme, diatomaceous earth self has good porous structure, has fine adsorption and filtration characteristic, and density is little, and the heat accumulation nature is good, as main skeleton material in this scheme, makes porous ceramic, uses in aerosol generating device, in aerosol generating device use, and the atomizing filter effect is good, and the quality is light. The quartz sand, the glass powder, the kaolin, the talc and the bentonite are fluxing components, so that the sintering temperature can be reduced, and the sintering is promoted. The pore former may be removed during the debinding sintering of the porous ceramic to leave a pore structure. Magnesium oxide, zinc oxide and titanium dioxide are used as additives, and have the effects of adjusting phase components of inorganic phases, sterilizing and the like. The strength of the porous ceramic can be conveniently adjusted by adding the feldspar. The calcium carbonate can adjust the wettability and improve the sintering temperature, and the sepiolite can be added to adjust the comprehensive taste of the aerosol generating device.

Wherein, the diatomite may be 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, the quartz sand may be 1%, 5%, 10%, 15%, 20%, the glass frit may be 1%, 5%, 10%, 15%, 20%, the pore-forming agent may be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, the kaolin may be 1%, 5%, 10%, 15%, 20%, the calcium carbonate may be 0-10%, the magnesium oxide may be 0%, 2%, 5%, 8%, 10%, the zinc oxide may be 0%, 2%, 5%, 8%, 10%, the titanium dioxide may be 0%, 2%, 5%, 8%, 10%, the talc may be 0%, 1%, 5%, 10%, 15%, the feldspar may be 0%, 1%, 5%, 10%, 15%, the sepiolite may be 0%, 2%, 5%, 8%, 10%, and the bentonite may be 0%, 1%, 2%, 3%, 4%, 5%.

As a further preferable technical scheme of the ceramic powder in this embodiment, the ceramic powder includes the following components by mass percent: 40-50% of diatomite, 5-10% of quartz sand, 5-10% of glass powder, 20-30% of pore-forming agent, 5-10% of kaolin, 2-5% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-10% of talcum, 2-10% of feldspar, 0-5% of sepiolite and 0-5% of bentonite.

Wherein, by mass percentage, the diatomite can be 40%, 42%, 44%, 46%, 48%, the quartz sand can be 5%, 7%, 8%, 10%, the glass powder can be 5%, 7%, 8%, 10%, the pore-forming agent can be 20%, 22%, 24%, 26%, 28%, 30%, the kaolin can be 5%, 7%, 8%, 10%, the calcium carbonate can be 2%, 3%, 4%, 5%, the magnesium oxide can be 0%, 2%, 4%, 6%, 8%, 10%, the zinc oxide can be 0%, 2%, 4%, 6%, 8%, 10%, the titanium dioxide can be 0%, 2%, 4%, 6%, 8%, 10%, the talc can be 0%, 2%, 4%, 6%, 8%, 10%, the feldspar can be 2%, 4%, 6%, 8%, 10%, the sepiolite can be 0%, 1%, 2%, 3%, 4%, 5%, and the bentonite can be 0%, 1%, 2%, 3%, 4%, 5%. Among them, too much calcium carbonate results in large shrinkage ratio, poor dimensional consistency and reduced strength, and in the range of 2-5%, the shrinkage is small, the dimensional consistency is good, and the strength is large.

In another aspect, the binder comprises the following components in weight percent: 30-75% of paraffin, 1-20% of beeswax, 2-35% of low-density polyethylene, 1-10% of stearic acid, 0-5% of vegetable oil and 0-10% of plasticizer.

The main function of the binder in this embodiment is to impart fluidity to the ceramic powder, which is beneficial to molding, and the binder can be removed completely in the degreasing process to form a porous structure. In this embodiment, the paraffin wax, as a small molecular weight organic substance, has good thermochemical properties, and is easily removed at high temperature, and is used as a main material of a binder. The adhesive is applied to ceramic powder, and when the porous ceramic is manufactured, the adhesive is easy to remove and clean, and the aerosol generating device has better and clean mouthfeel. The melting point of the beeswax is higher than that of the paraffin wax, so that the range of removing temperature is widened, and bubbling caused by violent volatilization of the binder at the temperature for removing the paraffin wax is avoided. The low-density polyethylene is used as a high-viscosity high-elasticity material and is a high-temperature framework of the adhesive. Stearic acid facilitates the dispersion of the ceramic powder and the binder. The vegetable oil is used as a lubricant, which is beneficial to demoulding in the material forming process. The plasticizer can improve the plasticity of the injection-molded green body.

Wherein, the paraffin wax can be 30%, 35%, 40%, 45%, 55%, 60%, 65%, 70%, 75%, 1%, 5%, 10%, 15%, 20%, 2%, 5%, 10%, 15%, 20%, 30%, 35%, 1%, 2%, 4%, 6%, 8%, 10%, 0%, 1%, 2%, 3%, 4%, 5%, 0%, 2%, 4%, 6%, 8%, 10% by mass of vegetable oil.

As a further preferable technical scheme of the binder in this embodiment, the binder comprises the following components in percentage by mass: 50-60% of paraffin, 5-10% of beeswax, 15-20% of low-density polyethylene, 5-10% of stearic acid, 2-5% of vegetable oil and 3-8% of plasticizer.

Wherein, the mass percentage of the paraffin wax can be 50%, 52%, 54%, 56%, 58%, 60%, the mass percentage of the beeswax can be 5%, 7%, 9%, 10%, the mass percentage of the low-density polyethylene can be 15%, 16%, 18%, 20%, the mass percentage of the stearic acid can be 5%, 7%, 9%, 10%, the mass percentage of the vegetable oil can be 2%, 3%, 4%, 5%, and the mass percentage of the plasticizer can be 3%, 5%, 7%, 8%.

Example 2

The ceramic powder comprises the following components in percentage by mass: 50% of diatomite, 5% of quartz sand, 6% of glass powder, 30% of pore-forming agent, 5% of kaolin and 4% of feldspar.

Example 3

The ceramic powder comprises the following components in percentage by mass: 50% of diatomite, 5% of quartz sand, 10% of glass powder, 30% of pore-forming agent and 5% of kaolin.

Example 4

The ceramic powder comprises the following components in percentage by mass: 40% of diatomite, 5% of quartz sand, 5% of glass powder, 10% of pore-forming agent, 7% of kaolin, 5% of magnesium oxide, 5% of zinc oxide, 5% of titanium dioxide, 10% of talc, 5% of feldspar and 3% of bentonite.

Example 5

The ceramic powder comprises the following components in percentage by mass: 30% of diatomite, 5% of quartz sand, 5% of glass powder, 10% of pore-forming agent, 2% of kaolin, 5% of calcium carbonate, 5% of magnesium oxide, 5% of zinc oxide, 5% of titanium dioxide, 10% of talc, 5% of feldspar, 10% of sepiolite and 3% of bentonite.

Example 6

The adhesive comprises the following components in percentage by mass: 60% of paraffin, 10% of beeswax, 15% of low-density polyethylene, 5% of stearic acid, 5% of vegetable oil and 5% of plasticizer.

Example 7

The adhesive comprises the following components in percentage by mass: 70% of paraffin, 10% of beeswax, 15% of low-density polyethylene and 5% of stearic acid.

Example 8

The adhesive comprises the following components in percentage by mass: 70% of paraffin, 7% of beeswax, 15% of low-density polyethylene, 5% of stearic acid and 3% of vegetable oil.

Example 9

The adhesive comprises the following components in percentage by mass: 70% of paraffin, 7% of beeswax, 15% of low-density polyethylene, 3% of stearic acid and 5% of plasticizer.

Example 10

As shown in fig. 1, a method for manufacturing a porous ceramic includes:

step 1: weighing the ceramic powder and the binder in the embodiments in proportion;

and 2, step: heating the binder in the step 1 to be in a molten state, and adding the ceramic powder in the step 1 for mixing to obtain a premixed material;

and step 3: granulating the premixed material obtained in the step 2, and then performing injection molding to obtain an injection molding blank;

According to the porous ceramic manufacturing method, the ceramic powder and the binder are adopted, the porous ceramic is manufactured through injection molding, inorganic powder does not need to be used for landfill high-temperature degreasing, the inorganic powder does not need to be cleaned, manpower and material resources are saved, and the ceramic is not easy to damage. The porous ceramic aerosol generating device is applied to the aerosol generating device, the aerosol generating device adopting the porous ceramic has no risk of powder falling, the safety is good, the metal heating circuit is not easy to fall off, and the risk of core pasting is low.

In the embodiment, the non-buried powder degreasing technology can realize the integration of burning and removing, and the product is finished by feeding into the furnace once, so that the time is saved. In the existing inorganic powder landfill process, the buried powder is degreased for about 40 hours, sticky powder on the surface is taken out and cleaned for about 4 hours, the buried powder is placed in a sintering furnace for high-temperature sintering and temperature rise for about 6 hours, the temperature is kept for 2 hours, and the buried powder is taken out after being cooled along with the furnace. The manufacturing method of the porous ceramic can save the time for cleaning the surface adhesive powder.

Step 4 may specifically be: and (3) degreasing the injection molding blank body in the step (3) and sintering the injection molding blank body to obtain the porous ceramic. Specifically, the injection molding blank is degreased for 40 hours, taken out and directly placed in a sintering furnace for high-temperature sintering, the temperature rise time is about 6 hours, the temperature is kept for 2 hours, and the injection molding blank is taken out after being cooled along with the furnace. Compared with the prior art, the method saves the time for cleaning the surface sticky powder and the step of cleaning the powder, thereby avoiding the damage of the ceramic substrate caused by the step, and increasing the yield from about 94 percent to about 99 percent.

In another embodiment, step 4 may also be: and (4) simultaneously carrying out high-temperature degreasing and sintering the injection molding blank body in the step (3) to obtain the porous ceramic. Specifically, degreasing at high temperature, sintering for 42 hours, cooling with a furnace, and taking out. This embodiment realizes degrease and sintering than current technology, just can realize two steps of degrease and sintering with same high temperature furnace, has reduced equipment quantity, has shortened degrease sintering total time, and need not to clear up and glue powder, and the product is cleaner, and is safer, and the yield is for being close to 100%.

In the step 2, the binder is heated to be in a molten state, so that the ceramic powder is fully mixed and fused, and in the step 3, the granules in the step 2 are uniformly injected into a blank.

Specifically, the step 1 further includes the steps of: drying the ceramic powder at 70-90 deg.c for 1.5-2.5 hr. Preferably, the drying temperature is 80 ℃ and the drying time is 2h. After drying, the product can be naturally cooled for later use. The drying is intended to remove the water from the ceramic powder and to prevent uncontrolled porosity during injection molding in the event of excessive water.

Specifically, the step 2 specifically comprises: heating the binder in the step 1 to 70-170 ℃, and carrying out banburying, kneading or stirring to enable the binder to be in a molten state; adding the ceramic powder obtained in the step (1) and mixing for 2-5 h to obtain a premixed material. One of banburying, kneading or stirring may be selected to mix the binder uniformly. The internal mixing, kneading or stirring is carried out by means of corresponding internal mixers, kneaders, stirrers.

Specifically, the step 3 specifically comprises: granulating the premixed material obtained in the step 2, wherein the granulation temperature is 50-140 ℃; and performing injection molding on the premixed material to obtain an injection molding blank, wherein the injection molding temperature is 50-140 ℃. And after the injection molding blank body is obtained, removing burrs and a joint line of the injection molding blank body.

The step 4 specifically comprises the following steps: heating the sintering temperature from room temperature to 250 ℃, and preserving heat, wherein the heating time is 730min, and the heat preservation time is 240min; heating the sintering temperature from 250 ℃ to 350 ℃, and preserving heat, wherein the heating time is 300min, and the heat preservation time is 60min; heating the sintering temperature from 350 ℃ to 500 ℃, and preserving heat, wherein the heating time is 150min, and the heat preservation time is 60min; heating the sintering temperature from 500 ℃ to 900 ℃ for 120min; heating the sintering temperature from 900 ℃ to 1100 ℃, and preserving the heat, wherein the heating time is 120min, and the heat preservation time is 120min; and (4) reducing the sintering temperature from 1100 ℃ to room temperature to finish sintering.

As shown in the thermal analysis curve (DG-DSC curve) of the injection molding blank body shown in FIG. 2, the injection molding blank body is slowly heated up from room temperature to 250 ℃, and the deformation of the blank body caused by too fast heating up is avoided; the temperature of 250-350 ℃ is a violent volatilization stage of the organic matters, the heating rate is reduced, and the organic matters are completely removed. And (3) volatilizing the organic matters at 500 ℃ completely, quickly heating, and carrying out heat preservation sintering at 1100 ℃ to obtain the porous ceramic with uniformly distributed pores.

Specifically, the ceramic powder weighed in the step 1 accounts for 55-80% of the total mass of the ceramic powder and the binder, and the balance is the binder. The ceramic powder has a solid content, and the high solid content is beneficial to keeping the shape without collapsing and deforming in the degreasing process. However, the solid content is too high to facilitate injection molding, and the ceramic powder is selected to be 55-80%.

More specifically, in one embodiment, the ceramic powder is 70% by weight and the binder is 30% by weight. Wherein, in the ceramic powder, the percentage of each component is as follows according to the mass percentage: 50% of diatomite, 5% of quartz sand, 6% of glass powder, 30% of pore-forming agent, 5% of kaolin and 4% of feldspar. In the binder, the percentage by mass of each component is as follows: 60% of paraffin, 10% of beeswax, 15% of low-density polyethylene, 5% of stearic acid, 5% of vegetable oil and 5% of plasticizer. As shown in Table 1, the porosity of the porous ceramic obtained by the formula is more than or equal to 60%, the pore diameter is about 20 mu m, the high reduction degree of the porous ceramic is met, and the taste is excellent.

TABLE 1

Sintering temperature	Porosity of the material	Pore diameter	Taste of food
				1100℃	63.97％	25.53um	Superior food

In one embodiment, the ceramic powder is 75% by weight and the binder is 25% by weight. The ratio of each component in the ceramic powder and the ratio of each component in the binder are the same as above, and are not described again. As shown in Table 2, the porosity of the porous ceramic obtained by the formula is more than or equal to 60%, the pore diameter is about 20 mu m, the high reduction degree of the porous ceramic is met, and the mouthfeel is excellent.

TABLE 2

Sintering temperature	Porosity factor	Pore diameter	Taste of food
				1120℃	63.16％	20.7um	Superior food

Example 11

The porous ceramic is prepared by the above porous ceramic preparation method. The porous ceramic prepared by the method does not need to be cleaned of inorganic powder, so that manpower and material resources are saved, the ceramic is not easy to damage, the risk of powder falling is avoided, the safety is good, the metal heating circuit of the aerosol generating device is not easy to fall off, and the risk of core pasting is small.

Example 12

Use of a porous ceramic as described above in an aerosol generating device. The porous ceramic is used in the aerosol generating device, the aerosol generating device has no risk of powder falling, the safety is good, the metal heating circuit is not easy to fall off, and the risk of core pasting is low.

It should be noted that, the limitations of the steps involved in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all should be considered to belong to the protection scope of the present disclosure.

The foregoing is a more detailed description of the invention in connection with specific alternative embodiments, and the practice of the invention should not be construed as limited to those descriptions. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.

Claims

1. The porous ceramic material comprises ceramic powder and a binder, and is characterized in that the ceramic powder accounts for 55-80% by mass, and the balance is the binder.

2. The porous ceramic material of claim 1 wherein the ceramic powder comprises the following composition in weight percent: 30-70% of diatomite, 1-20% of quartz sand, 1-20% of glass powder, 10-50% of pore-forming agent, 1-20% of kaolin, 0-10% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-15% of talc, 0-15% of feldspar, 0-10% of sepiolite and 0-5% of bentonite.

3. The porous ceramic material of claim 2 wherein the ceramic powder comprises the following components in weight percent: 40-50% of diatomite, 5-10% of quartz sand, 5-10% of glass powder, 20-30% of pore-forming agent, 5-10% of kaolin, 2-5% of calcium carbonate, 0-10% of magnesium oxide, 0-10% of zinc oxide, 0-10% of titanium dioxide, 0-10% of talcum, 2-10% of feldspar, 0-5% of sepiolite and 0-5% of bentonite.

4. The porous ceramic material of claim 1 wherein the binder comprises the components in weight percent: 30-75% of paraffin, 1-20% of beeswax, 2-35% of low-density polyethylene, 1-10% of stearic acid, 0-5% of vegetable oil and 0-10% of plasticizer.

5. The porous ceramic material of claim 4 wherein the binder comprises the following components in weight percent: 50-60% of paraffin, 5-10% of beeswax, 15-20% of low-density polyethylene, 5-10% of stearic acid, 2-5% of vegetable oil and 3-8% of plasticizer.

6. A method for manufacturing porous ceramics is characterized by comprising the following steps:

step 1: weighing the ceramic powder material as claimed in any one of claims 1 to 5 and a binder in proportion;

7. The method for manufacturing porous ceramics according to claim 6, wherein the step 2 is specifically:

8. The method for manufacturing a porous ceramic according to any one of claims 6 to 7, wherein the step 4 is specifically:

heating the sintering temperature from room temperature to 250 ℃, and preserving heat, wherein the heating time is 730min, and the preserving heat time is 240min;

heating the sintering temperature from 500 ℃ to 900 ℃ for 120min;

9. A porous ceramic produced by the production method according to any one of claims 6 to 8.

10. Use of a porous ceramic according to claim 9 in an aerosol generating device.