CN117417197A

CN117417197A - Porous ceramic material, preparation method thereof and aerosol generating device

Info

Publication number: CN117417197A
Application number: CN202210814984.1A
Authority: CN
Inventors: 张世忠; 孙耀明; 吴伟; 张海波
Original assignee: Shenzhen ALD Technology Co Ltd
Current assignee: Shenzhen ALD Technology Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2024-01-19

Abstract

The application relates to a porous ceramic material, a preparation method thereof and an aerosol generating device, which comprises the following steps: mixing a ceramic preparation material, a pore-forming agent and a first binder to obtain a precursor; the ceramic preparation comprises a fiber raw material and a silicate material; mixing and pressing the precursor, a second adhesive and a plasticizer to obtain a blank; and sintering the blank to obtain the porous ceramic material. The application adopts the fiber raw material and the silicate material as the framework material of the porous ceramic, the fiber raw material has light weight and low heat conductivity, the fiber raw material and the silicate material are matched for use to generate a fine air hole structure through sintering treatment after the pore-forming agent is added, the strength of the porous ceramic can be improved, and the aperture ratio of the porous ceramic is improved, so that the rate of absorbing tobacco tar by the porous ceramic is improved, larger smoke quantity is generated, and the experience of a user is enhanced.

Description

Porous ceramic material, preparation method thereof and aerosol generating device

Technical Field

The application belongs to the technical field of atomizers, and particularly relates to a porous ceramic material, a preparation method thereof and an aerosol generating device.

Background

The electronic cigarette is a novel product which replaces the traditional cigarette by heating tobacco tar in a 'cigarette bullet' to generate smoke by using a rechargeable lithium polymer battery to supply power to drive the atomizer, the harm of the electronic cigarette to the human body is smaller than that of the traditional cigarette, no open fire participates in the process of generating smoke by the electronic cigarette, and no harmful substances such as tar generated by burning the traditional cigarette are generated.

The atomizer is the core part of electron cigarette, and the structural formula of current mainstream adopts porous ceramic atomizing core, moreover, porous ceramic atomizing core can also be applied to other atomizing fields such as medical atomization, to electron cigarette atomizing core and medical class atomizing higher and higher technical requirement, current ceramic atomizing core generally adopts metal film to combine together with ceramic conductor to prepare, and it contains heavy metal, intensity is little, and porous ceramic's open porosity improves limitedly moreover, can't adsorb too much tobacco tar, leads to porous ceramic atomizing core's experience to feel relatively poor.

Because, in order to enhance the experience of atomizers, there is an urgent need for a porous ceramic material that is strong and has a large open porosity.

Disclosure of Invention

In order to overcome the defects, the application provides a porous ceramic material, a preparation method thereof and an aerosol generating device.

In a first aspect, the present application provides a method for preparing a porous ceramic material, comprising the steps of:

mixing the ceramic-coated preparation material, the pore-forming agent and the first binder to obtain a precursor; the ceramic preparation comprises a fiber raw material and a silicate material;

mixing and pressing the precursor, a second binder and a plasticizer to obtain a blank;

and sintering the blank to obtain the porous ceramic material.

With reference to the first aspect, the mixture comprises the following components in percentage by mass: 30-70% of ceramic preparation materials, 10-30% of pore-forming agents and 10-15% of first binders.

With reference to the first aspect, the blank comprises the following components in percentage by mass: 50-70% of precursor, 10-30% of second binder and 5-10% of plasticizer.

In combination with the first aspect, the mass ratio of the fiber raw material to the silicate material is 1 (2-9).

With reference to the first aspect, the silicate material includes at least one of diatomaceous earth, molite, feldspar, olivine, quartz, and montmorillonite.

With reference to the first aspect, the fiber raw material includes at least one of ceramic fibers, glass fibers, and ceramic whiskers.

With reference to the first aspect, the pore-forming agent includes at least one of resin pellets, starch, and graphite powder.

With reference to the first aspect, the first binder includes paraffin wax or a mixture of paraffin wax and resin.

With reference to the first aspect, the second binder includes at least one of paraffin wax, beeswax and a resin.

With reference to the first aspect, the plasticizer includes at least one of stearic acid and oleic acid.

In combination with the first aspect, the preparation method further comprises the steps of ball milling and sieving after mixing the ceramic preparation, the pore-forming agent and the first binder.

With reference to the first aspect, the ball milling time is 1 h-12 h.

With reference to the first aspect, the size of the screen mesh for sieving is 200-400 mesh.

With reference to the first aspect, the manner of forming the mixture into the green body includes at least one of hot die casting, injection molding, gel molding and casting.

With reference to the first aspect, the temperature of the injection molding is 80 ℃ to 160 ℃.

With reference to the first aspect, the injection molding pressure is 80 ℃ to 160 ℃.

With reference to the first aspect, the method further includes a step of degreasing the green body before sintering the green body.

With reference to the first aspect, the degreasing treatment temperature is 100 ℃ to 500 ℃.

With reference to the first aspect, the degreasing treatment time is 5-30 h.

With reference to the first aspect, the atmosphere of the sintering process includes at least one of nitrogen, air, argon, and a nitrogen-hydrogen mixture.

With reference to the first aspect, the sintering treatment temperature is 800 ℃ to 1300 ℃.

With reference to the first aspect, the temperature rising rate of the sintering treatment is 1 ℃/min-10 ℃/m.

With reference to the first aspect, the heat preservation time of the sintering treatment is 5-20 h.

In a second aspect, the present application provides a porous ceramic material comprising a plurality of dispersed ceramic particles having a plurality of pore structures disposed therein, the ceramic particles having a porosity of 40% to 90%.

With reference to the second aspect, the surface of the ceramic particles is also distributed with the pore structure.

With reference to the second aspect, the median particle diameter of the ceramic particles is 40 μm to 50 μm.

With reference to the second aspect, the pore structure may or may not be in communication within the ceramic particles.

With reference to the second aspect, the average pore diameter of the pore structure is 15 μm to 30 μm.

With reference to the second aspect, the strength of the porous ceramic material is 20MPa to 40MPa.

In a third aspect, the present application provides an aerosol-generating device comprising a porous ceramic material prepared by the method of the first aspect or the porous ceramic material of the second aspect.

Compared with the prior art, the technical scheme has at least the following technical effects: the application adopts the fiber raw material and the silicate material as the framework material of the porous ceramic, and performs sintering treatment after adding the pore-forming agent, so that the fiber raw material and the silicate material can produce a fine pore structure when being matched for use, the strength of the porous ceramic can be improved, and the aperture ratio of the porous ceramic is improved, so that the rate of absorbing tobacco tar by the porous ceramic is improved, larger smoke quantity is generated, and the experience of a user is enhanced.

The ceramic particle strength of the porous ceramic prepared by the method is high, the thermal conductivity is low, the strength of the porous ceramic particle can be effectively improved without heavy metal impurities, the pore structure in the ceramic particle is large, the porosity can reach 40% -90%, the oil absorption rate is increased, and therefore larger oil storage capacity can be achieved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an aerosol generating device according to the present application;

FIG. 2 is an SEM image at 50 times magnification of porous ceramic material of example 1;

fig. 3 is an SEM image of the porous ceramic material of example 1 at 200 x magnification.

In fig. 1:

1-an aerosol generating device;

2-a suction nozzle portion;

3-atomizer;

31-a receiving chamber;

32-an atomizing core;

4-fluid channels;

5-power supply.

Detailed Description

For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The porous ceramic is a core component of the electronic atomizer, tiny micropores in the porous ceramic are key for realizing new stable smoke oil liquid guide and liquid locking of the porous ceramic, and due to surface tension and capillary action, smoke oil can uniformly infiltrate into an atomization core, so that the effect of the porous ceramic is realized, in the prior art, the strength of the porous ceramic is lower, the porosity is lower, the smoke oil infiltration effect is poor, too much smoke oil cannot be adsorbed, and the experience of the porous ceramic atomization core is poor.

Accordingly, the present application provides a method for preparing a porous ceramic material, comprising the steps of:

step 100, mixing a ceramic preparation material, a pore-forming agent and a first binder to obtain a precursor, wherein the ceramic preparation material comprises a fiber raw material and a silicate material.

And 200, mixing and pressing the precursor, the second binder and the plasticizer to obtain a blank.

And 300, sintering the green body to obtain the porous ceramic material.

In the scheme, the porous ceramic has the advantages that the fiber raw material and the silicate material are adopted as the framework material of the porous ceramic, the fiber raw material is light in weight and low in heat conductivity, the sintering treatment is carried out after the pore-forming agent is added, the fiber raw material and the silicate material are matched for use, so that a fine pore structure can be generated, the strength of the porous ceramic can be improved, the opening rate of the porous ceramic can be improved, the rate of absorbing tobacco tar by the porous ceramic is improved, larger smoke quantity is generated, and the experience of a user is enhanced.

The following describes the preparation method of the present application in detail according to specific examples.

Step 100, mixing a ceramic preparation material, a pore-forming agent and a first binder to obtain a precursor, wherein the ceramic preparation material comprises a fiber raw material and a silicate material. Specifically:

and respectively weighing 30-70% of ceramic preparation materials, 10-30% of pore-forming agent and 10-15% of binder according to mass percentage, and mixing the materials to obtain the mixture.

In some embodiments, the ceramic preparation comprises a fibrous raw material and a silicate material, illustratively having a mass ratio of 1 (2-9), the mass of the fibrous raw material and the silicate material may be, for example, 1: 2. 1: 3. 1: 4. 1: 5. 1: 6. 1: 7. 1:8 and 1:9, etc., the addition amount of the fiber raw material is too large, so that the suction taste is poor; the addition of the fiber raw material is too small, so that the ceramic strength is not high, the pore opening is insufficient, and the pore connectivity is not good.

In some embodiments, the silicate comprises at least one of diatomaceous earth, aleurone, feldspar, olivine, quartz, and montmorillonite.

In some embodiments, the fibrous feedstock comprises at least one of ceramic fibers, glass fibers, and ceramic whiskers. The fiber raw material has low heat conductivity and high temperature resistance, and can generate large smoke when being added as the raw material.

In some embodiments, the pore former comprises at least one of resin pellets, starch, and graphite powder.

In some embodiments, the first binder comprises at least one of paraffin, polyvinyl alcohol, and polyvinyl butyral.

In some embodiments, the means for mixing the ceramic preparation, pore former, and first binder includes mechanical mixing, which may be ball milling, for example.

In some embodiments, the powder obtained by ball milling, mixing and sieving is uniform and fine in particle size, wherein the size of the sieve is 20 meshes, 0-400 meshes, and the size of the sieve can be specifically 200 meshes, 250 meshes, 300 meshes, 350 meshes, 400 meshes and the like.

And 200, mixing and pressing the precursor obtained in the step 100, the second binder and the plasticizer to obtain a blank.

In some embodiments, the pressing means comprises at least one of hot die casting, injection molding, gel molding and casting, preferably, the pressing means is injection molding.

In some embodiments, the injection molding temperature is 80 to 160 ℃, the injection molding temperature may be, for example, 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, etc., preferably the injection molding temperature is 130 ℃.

In some embodiments, the injection molding pressure is 0.2MPa to 0.7MPa, and the injection molding pressure may be, for example, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, and the like.

In some embodiments, the second binder may be at least one of paraffin wax, beeswax, and a resin, and it is understood that the second binder may be a wax such as paraffin wax, beeswax, or a resin material, and of course, the second binder may be a mixture of the wax and a resin, wherein the resin includes at least one of polyvinyl alcohol, polyvinyl butyral, and an epoxy resin. When the binder adopts the mixture of the wax substance and the resin, the mass ratio of the wax substance to the resin is (8-12): 1, specifically, the mass ratio of the wax-like substance to the resin may be, for example, 8: 1. 9: 1. 10: 1. 11:1 and 12:1, etc., the second binder is used for bonding the particles of the precursor particles, the pore-forming agent, etc. to the ceramic with a specific shape and a certain strength.

In some embodiments, the mass ratio of the second binder in the green body is 10% -30%, and the mass ratio of the second binder in the green body may be, for example, 10%, 15%, 20%, 25%, 30%, etc.

In some embodiments, the plasticizer comprises at least one of stearic acid and oleic acid.

In some embodiments, the plasticizer may be present in the body at a mass ratio of 5% to 10%, specifically, the plasticizer may be present in the body at a mass ratio of, for example, 5%, 6%, 7%, 8%, 9%, and 10%.

In some embodiments, the step 200 is followed by a step of degreasing the blank.

In the above steps, degreasing treatment is performed by heating, and organic matters (a first binder and a second binder) in the green body are volatilized or decomposed by heating to be removed from the green body, and meanwhile, a certain presintering effect is also achieved.

In some embodiments, the degreasing temperature is 100 to 500 ℃, the degreasing temperature may be 100 ℃, 200 ℃, 300 ℃, 400 ℃, 500 ℃ or the like, and other values within the above range are of course also possible, without limitation.

In some embodiments, the degreasing time is 5h to 30h, and the degreasing time may be 5h, 8h, 10h, 12h, 15h, 20h, 25h, 28h, 30h, or the like, but may be other values within the above range, which is not limited thereto.

And 300, sintering the green body to obtain the porous ceramic material.

In some embodiments, the atmosphere of the sintering process comprises at least one of nitrogen, air, argon, and a mixture of nitrogen and hydrogen;

in some embodiments, the sintering temperature is 800 to 1300 ℃, the sintering temperature may be 800 ℃, 900 ℃, 1000 ℃, 1100 ℃, 1200 ℃, 1300 ℃, etc., but may be other values within the above range, without limitation.

In some embodiments, the heating rate of the sintering process is 1 ℃/min to 10 ℃/min, and the heating rate of the sintering process may be 1 ℃/min, 2 ℃/min, 3 ℃/min, 4 ℃/min, 5 ℃/min, 6 ℃/min, 7 ℃/min, 8 ℃/min, 9 ℃/min, 10 ℃/min, etc., but may be other values within the above range, and is not limited thereto.

In some embodiments, the heat preservation time of the sintering process is 5h to 20h, and the heat preservation time of the sintering process may be 5h, 8h, 10h, 12h, 15h, 20h, etc., but may be other values within the above range, and is not limited thereto.

In some embodiments, the porous ceramic particles prepared by the method do not have a heating function, a heating circuit can be added to the ceramic porous material after sintering treatment, and in step 200, hollow heating wires can be added to the precursor, the second binder and the plasticizer, and then compression molding treatment is performed. Preferably, the heating wire is added and then subjected to compression molding treatment, so that the heating wire is embedded into the porous ceramic, the contact area between the heating wire and the porous ceramic can be increased, the heating rate of the heating wire is improved, and the taste and the reduction degree of tobacco tar are improved.

In some embodiments, the preparation method further comprises the step of cleaning the porous ceramic material after the preparation of the porous ceramic material, so that harmful substances on the surface of the porous ceramic material are removed, and the taste of the porous ceramic material is further improved. For example, the method can be used for removing harmful impurities by adopting an ultrasonic cleaning mode.

The application also provides the porous ceramic material prepared by the method, the porous ceramic material comprises a plurality of dispersed ceramic particles, a plurality of air hole structures are arranged in the ceramic particles, and the porosity of the ceramic particles is 40% -90%.

In the scheme, ceramic particle intensity is big, the thermal conductivity is low in the porous ceramics of this application, and does not contain heavy metal impurity, can effectively improve the intensity of porous ceramics particle, and the pore structure in the ceramic particle of this application is great, and the porosity can reach 40% -90%, increases oil absorption rate to can realize bigger oil storage volume, the porous ceramics material of this application has big aperture ratio in the time of can keeping high strength, can realize great smog volume, promotes user experience. It is understood that the porosity of the ceramic particles refers to the ratio of the volume of the pore structure in the ceramic particles to the total volume of the ceramic particles.

In some embodiments, the porosity of the ceramic particles is 40% to 90%, specifically, the porosity of the ceramic particles may be, for example, 40%, 50%, 60%, 75%, 80%, 90%, etc.

In some embodiments, the surface of the ceramic particles is also distributed with air hole structures, and the existence of the surface air hole structures can improve the oil absorption rate of the porous ceramic and further improve the atomization effect.

In some embodiments, the median particle diameter of the ceramic particles is 40 μm to 50 μm, and the median particle diameter of the ceramic particles may be, for example, 40 μm, 41 μm, 42 μm, 43 μm, 44 μm, 45 μm, 46 μm, 47 μm, 48 μm, 49 μm, 50 μm, etc., and ceramic particles in the above particle diameter ranges are advantageous in forming ceramic pore diameters having a uniform pore diameter and a size of 10 μm to 30 μm, and the ceramic maintains a high strength.

In some embodiments, the pore structures are communicated or not communicated in the ceramic particle, and it is understood that the pore structures can be a plurality of independent pore structures formed in the ceramic particle, a plurality of connected pore structures formed in the ceramic particle, a separation state that part of pore structures are not communicated in the ceramic particle, and a communication state that part of pore structures are communicated in the ceramic particle, and the pore structures in the communication state can increase the opening ratio of the porous ceramic and increase the oil storage capacity of the porous ceramic.

In some embodiments, the average pore size of the pore structure is from 10 μm to 30 μm, and the average pore size of the pore structure may be, for example, 10 μm, 15 μm, 20 μm, 25 μm, and 30 μm, applicants found that: the pore structure in the pore diameter range can ensure that the porous ceramic has higher porosity.

In some embodiments, the strength of the porous ceramic material is 20MPa to 40MPa, specifically, the strength of the porous ceramic material may be, for example, 20MPa, 21MPa, 22MPa, 23MPa, 24MPa, 25MPa, 26MPa, 27MPa, 28MPa, 29MPa, 32MPa, 35MPa, 37MPa, and 40MPa.

The present application also provides an aerosol-generating device 1, which aerosol-generating device 1 may be, for example, an electronic cigarette.

As shown in fig. 1, the aerosol generating device 1 of the present application comprises a suction nozzle portion 2, an atomizer 3, a fluid channel 4, and other components or structures needed or present, wherein the atomizer 3 comprises a receiving cavity 31 for receiving a substrate capable of generating aerosol and an atomizing core 32 for heating the substrate capable of generating aerosol and generating aerosol, and the fluid channel 4 is respectively connected with the suction nozzle portion 2 and an outlet of the atomizer 3 for delivering the aerosol to a user.

In some embodiments, the housing of the aerosol-generating device 1 may be cylindrical or may be designed into other shapes, when the aerosol-generating device 1 is cylindrical, the atomizer 3 may be designed into a tube shape, and the side wall thereof may coincide with the housing, or a gap exists between the two, the accommodating cavity 31 of the atomizer 3 may be an annular space formed by the inner side of the housing and the outer side of the fluid channel 4, the upper end of the fluid channel 4 is connected with the suction nozzle portion 2, the lower end of the fluid channel may penetrate through the bottom of the accommodating cavity 31 and enter the atomizing core of the atomizer 3, and the porous ceramic material of the present application is disposed in the atomizing core.

In some embodiments, the aerosol-generating device 1 uses a battery-type power source 5 as a heating means, and the power source 5 is connected to the electrical contact end of the atomizing core 32 by a connecting wire.

Those skilled in the art will appreciate that the above-described methods of preparing porous ceramic materials are merely examples. Other methods commonly used in the art may be employed without departing from the disclosure of the present application.

The embodiments of the present application are further described below in terms of a number of examples. The embodiments of the present application are not limited to the following specific embodiments. The modification can be appropriately performed within the scope of the main claim.

Example 1

(1) 10g of ceramic fiber, 70g of diatomite, 20g of starch and 20g of paraffin are weighed and mixed, and ball milling and 300 mesh screen sieving are sequentially carried out to obtain a precursor.

(2) Mixing the precursor, 30g of paraffin and 8g of stearic acid, and performing compression molding by adopting an injection molding machine to obtain a blank, wherein the temperature of the injection molding machine is set to 130 ℃, and the pressure of the injection molding machine is set to 0.5MPa.

(3) And (3) heating the blank obtained in the step (2) at 300 ℃ for 10 hours.

(4) And (3) heating the sample obtained in the step (3) to 1000 ℃ in a sintering furnace in nitrogen atmosphere at a heating rate of 5 ℃/min, and preserving heat for 8 hours to obtain the porous ceramic material.

The porous ceramic prepared in this example comprises a plurality of dispersed ceramic particles, wherein a plurality of pore structures are arranged in the ceramic particles, and the pore diameters of the pore structures, the median particle diameter, the strength and the porosity of the porous ceramic material are shown in table 2.

Examples 2-6 and comparative examples 1-5 of the present application were prepared in a similar manner, with specific differences shown in Table 1.

TABLE 1 preparation parameters for examples and comparative examples

Performance test:

1. and testing the average pore diameter of the pore structure in the porous ceramic particles by adopting a mercury intrusion method and testing the particle size of the porous ceramic by adopting a laser particle sizer.

2. The porous ceramic material was tested for porosity by an archimedes drainage method.

3. The strength of the porous ceramic was tested by the method of national standard GB/T4740-1999.

4. Micropore oil guiding test of porous ceramic: carrying out an internal standard test by using tobacco tar, and adopting a titration mode to enable the tobacco tar in unit volume to pass through the ceramic; the test tobacco tar consisted of 50% propylene glycol and 50% glycerin (glycerol) by mass, and each example formulation was tested using 3 samples, averaged as example sample oil transfer rate in mg/s. The test results are shown in Table 2.

TABLE 2 Performance test of examples and comparative examples

From the data in table 1, it can be seen that: the porous ceramic of this application embodiment 1 ~ 6 preparation, ceramic particle intensity is big, the thermal conductivity is low, and does not contain heavy metal impurity, can effectively improve the intensity of porous ceramic particle, and the pore structure in the ceramic particle of this application is great, and the porosity can reach 40% -90%, increases oil absorption rate to can realize bigger oil storage volume, the porous ceramic material of this application has big aperture ratio in the time of can keeping high strength, can realize great smog volume, promotes user experience.

In comparative example 1, the ceramic preparation, the pore-forming agent and the first binder were not previously mixed, and the porosity of the prepared porous ceramic was small, resulting in a decrease in the oil guiding rate, a decrease in the oil storage amount, and poor user experience.

In comparative examples 2 and 3, a single fiber raw material or silicate raw material is adopted, and the size and the porosity of the pores of the prepared porous ceramic are smaller, so that the oil guiding rate is reduced, the oil storage capacity is reduced, and the user experience is poor.

The addition of too little fiber material in comparative example 4 resulted in poor ceramic strength, insufficient open cell, and poor pore connectivity. In comparative example 5, the amount of the fiber raw material added is too much, the strength of the prepared porous ceramic is high, but the pore size is small, and the oil leakage condition exists, so that the user experience is poor.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The preparation method of the porous ceramic material is characterized by comprising the following steps:

mixing a ceramic preparation material, a pore-forming agent and a first binder to obtain a precursor; the ceramic preparation comprises a fiber raw material and a silicate material;

mixing and pressing the precursor, the second binder and the plasticizer to obtain a blank;

and sintering the blank to obtain the porous ceramic material.

2. The production method according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (3):

(1) The precursor comprises the following components in percentage by mass: 30-70% of ceramic preparation materials, 10-30% of pore-forming agents and 10-15% of first binders;

(2) The blank comprises the following components in percentage by mass: 50-70% of precursor, 10-30% of second binder and 5-10% of plasticizer;

(3) The mass ratio of the fiber raw material to the silicate material is 1 (2-9).

3. The production method according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (6):

(1) The silicate material comprises at least one of diatomite, molite, feldspar, olivine, quartz and montmorillonite;

(2) The fiber raw material comprises at least one of ceramic fiber, glass fiber and ceramic whisker;

(3) The pore-forming agent comprises at least one of resin balls, starch and graphite powder;

(4) The first binder comprises at least one of paraffin, polyvinyl alcohol, and polyvinyl butyral;

(5) The second binder comprises at least one of paraffin wax, beeswax and resin;

(6) The plasticizer includes at least one of stearic acid and oleic acid.

4. The production method according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (3):

(1) The preparation method further comprises the steps of ball milling and screening after mixing the ceramic preparation material, the pore-forming agent and the first binder;

(2) The preparation method further comprises the steps of ball milling and screening after mixing the ceramic preparation material, the pore-forming agent and the first binder, wherein the ball milling time is 1-12 h;

(3) The preparation method further comprises the steps of ball milling and screening after mixing the ceramic preparation material, the pore-forming agent and the first binder, wherein the size of the screened screen is 200-400 meshes.

5. The production method according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (3):

(1) The blank is formed by pressing at least one of hot die casting, injection molding, gel molding and casting molding;

(2) The blank is formed by at least one of hot die casting, injection molding, gel molding and casting molding, wherein the temperature of the injection molding is 80-160 ℃;

(3) The blank is formed by pressing at least one of hot die casting, injection molding, gel molding and casting molding, and the pressure of the injection molding is 0.3MPa to 0.7MPa.

6. The production method according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (3):

(1) The step of degreasing the green body is further included before the green body is sintered;

(2) The method comprises the steps of carrying out degreasing treatment on the blank body before sintering treatment, wherein the degreasing treatment temperature is 100-500 ℃;

(3) The method further comprises the step of degreasing the green body before sintering the green body, wherein the degreasing time is 5-30 h.

7. The method for producing a porous ceramic material according to claim 1, characterized in that the production method comprises at least one of the following features (1) to (4):

(1) The sintering treatment atmosphere comprises at least one of nitrogen, air, argon and nitrogen-hydrogen mixed gas;

(2) The sintering treatment temperature is 800-1300 ℃;

(3) The heating rate of the sintering treatment is 1-10 ℃/min;

(4) The heat preservation time of the sintering treatment is 5-20 h.

8. A porous ceramic material prepared by the preparation method according to any one of claims 1 to 7, wherein the porous ceramic material comprises a plurality of dispersed ceramic particles, a plurality of pore structures are arranged in the ceramic particles, and the porosity of the ceramic particles is 40% -90%.

9. The porous ceramic material of claim 8, wherein the porous ceramic material comprises at least one of the following features (1) - (5):

(1) The surface of the ceramic particles is also distributed with the pore structure;

(2) The median particle diameter of the ceramic particles is 40-50 mu m;

(3) The pore structure is communicated or not communicated inside the ceramic particles;

(4) The average pore diameter of the pore structure is 15-30 mu m;

(5) The strength of the porous ceramic material is 20 MPa-40 MPa.

10. An aerosol-generating device comprising a porous ceramic material prepared by the method of any one of claims 1 to 7 or a porous ceramic material of any one of claims 8 to 9.