Wollastonite glass ceramic porous ceramic, preparation method thereof and atomizer

Abstract

The invention belongs to the technical field of porous ceramic forming, and relates to a preparation method of wollastonite glass ceramic porous ceramic, which comprises the following steps: uniformly mixing ceramic hollow microspheres, wollastonite, a fluxing agent and a pore forming agent to obtain mixed powder; adding a dispersing agent, a plasticizer, a binder and water into the mixed powder, and uniformly stirring to obtain slurry; casting the slurry to obtain a ceramic green body; the ceramic green body is sequentially subjected to glue discharging and sintering, and the wollastonite glass ceramic porous ceramic is obtained. The invention further relates to the wollastonite glass ceramic porous ceramic and an atomizer. According to the technical scheme, the technology is simple, efficiency is high, ceramic hollow microbeads are used for self-foaming pore forming in the operation process, no foaming agent needs to be added, an inorganic pore forming agent is selected as the pore forming agent, pollution can be reduced, and cost can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of porous ceramic forming, and more specifically, to a wollastonite glass-ceramic porous ceramic, a preparation method thereof, and an atomizer. Background Art

[0002] In the existing porous ceramic forming technology, the injection molding method is widely used. However, the injection molding process has some inherent limitations. Specifically, the presence of the injection gate in the injection molding process results in uneven distribution of the density of the green body. This non-uniformity will be further amplified during the subsequent sintering process, causing the pore size distribution of the sintered porous ceramic to be uneven as well, seriously affecting the quality and performance of the product.

[0003] Secondly, a large amount of raw material waste is usually generated in the gate part of injection molding, which not only increases the production cost but also does not meet the requirements of resource conservation and environmental protection.

[0004] In addition, during the preparation of porous ceramics, in order to form the required pore structure, most processes use organic pore-forming agents for pore formation. However, these organic pore-forming agents are prone to decompose and volatilize to produce toxic substances during the subsequent debinding process, which poses a potential threat to the production environment and the health of operators. At the same time, the particle size distribution of the pore-forming agents often has a large range, resulting in uneven pore size distribution after pore formation and affecting the overall performance of the product. Moreover, the use of organic pore-forming agents is also likely to produce more closed pores, while the number of through pores is relatively small, which limits the application of porous ceramics in some specific fields, such as filtration, separation, and catalysis.

[0005] In summary, although the existing porous ceramic forming technology meets the production requirements to a certain extent, there are still many problems in terms of the uniformity of green body density, raw material utilization rate, pore size distribution control, and environmental friendliness, and there is an urgent need for improvement and optimization. Summary of the Invention

[0006] The purpose of the present application is to provide a wollastonite glass-ceramic porous ceramic, a preparation method thereof, and an atomizer to solve the technical problems of raw material waste, uneven green body density, uneven pore size distribution after sintering, and environmental pollution existing in the existing porous ceramic forming methods.

[0007] To solve the above technical problems, an embodiment of the present application provides a preparation method of a wollastonite glass-ceramic porous ceramic, which adopts the following technical solutions:

[0008] Mix ceramic hollow microspheres, wollastonite, a flux, and a pore-forming agent evenly to obtain a mixed powder;

[0009] Add a dispersant, a plasticizer, a binder, and water to the mixed powder and stir evenly to obtain a slurry;

[0010] Cast the slurry to obtain a green ceramic body;

[0011] Subject the green ceramic body to debinding and sintering in sequence to obtain wollastonite glass-ceramic porous ceramics.

[0012] To solve the above technical problems, an embodiment of the present application further provides a wollastonite glass-ceramic porous ceramic, which is prepared by using the preparation method of the wollastonite glass-ceramic porous ceramic described above.

[0013] To solve the above technical problems, an embodiment of the present application further provides an atomizer, which includes the wollastonite glass-ceramic porous ceramic described above.

[0014] Compared with the prior art, the present application mainly has the following beneficial effects:

[0015] The present application provides a wollastonite glass-ceramic porous ceramic and a preparation method thereof. By using the aqueous tape casting method to prepare the wollastonite glass-ceramic porous ceramic, the process is simple, the usage amount of organic solvents is reduced, and it is environmentally friendly and safe. Secondly, due to the smaller internal stress in the tape casting method, the powder particles in the slurry are evenly distributed, the surface is flat after sintering, the pore size distribution is uniform, the product consistency is higher, and the overall process efficiency is improved. In addition, through the decomposition reaction of the pore-forming agent at the initial stage of sintering, some pores are formed, the overall porosity is increased, and the self-foaming of the ceramic hollow microspheres during the sintering process forms pores, which can greatly shorten the debinding process, is more economical and environmentally friendly, the through-hole ratio is higher, and the porosity is further increased. The wollastonite glass-ceramic porous ceramic prepared by the preparation method of the present application has the advantages of high through-hole rate, good consistency, high yield, flat surface, uniform pore size distribution, etc., which is beneficial to subsequent thick film printing or thin film coating. Description of the Drawings

[0016] To more clearly illustrate the solutions in the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a flowchart of an embodiment of the preparation method of the wollastonite glass-ceramic porous ceramic according to the present application. Detailed Embodiments

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0019] Reference herein to "embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] In order to enable those skilled in the technical field to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0021] The embodiments of this application provide a preparation method of wollastonite glass-ceramic porous ceramics. Refer to Figure 1 as shown, which includes the following steps:

[0022] Step S10: Mix ceramic hollow microspheres, wollastonite, a flux, and a pore-forming agent evenly to obtain a mixed powder;

[0023] Step S20: Add a dispersant, a plasticizer, a binder, and water to the mixed powder and stir evenly to obtain a slurry;

[0024] Step S30: Cast the slurry to obtain a green ceramic body;

[0025] Step S40: Debind and sinter the green ceramic body in sequence to obtain wollastonite glass-ceramic porous ceramics.

[0026] Among them, the ceramic hollow microspheres can spontaneously foam and form pores, which can greatly shorten the debinding process and reduce pollution; wollastonite (CaSiO₃) can eutectically react with the ceramic hollow microspheres under the action of a flux to form a fibrous wollastonite crystal phase, making the density of the wollastonite glass-ceramic porous ceramic more uniform and helping to form a flat surface; the flux is mainly used to lower the sintering temperature of the ceramic hollow microspheres; the pore former is mainly used to form some pores through decomposition reactions at the initial stage of sintering to increase the overall porosity; the main function of the dispersant is to evenly distribute each component to improve the uniformity and stability of the slurry; the main function of the plasticizer is to improve the forming and processing properties of the material; the main function of the binder is to increase the bonding strength between components to ensure that the mixed slurry has sufficient strength and stability.

[0027] In this embodiment, the preparation method of the wollastonite glass-ceramic porous ceramic adopts the water-based tape casting method. This method has simple process, high efficiency. During the operation process, the ceramic hollow microspheres are used to spontaneously foam and form pores without adding an external foaming agent, and the pore former selects an inorganic pore former, which can not only reduce pollution, save costs, make the operation process more environmentally friendly, but also make the through-hole rate of the obtained product, the wollastonite glass-ceramic porous ceramic, higher; in addition, the debinding and sintering temperatures of this method are relatively low, which is convenient for operation, reduces costs at the same time, and is suitable for large-scale production.

[0028] In step S20, a dispersant, a plasticizer, a binder and water are added to the mixed powder, and vacuum stirring is carried out in a stirring container for 15 - 30 min. The purpose of vacuum stirring is to defoam and mix the solution and the powder evenly. After vacuum stirring, the slurry is obtained.

[0029] In some embodiments, for each component in the slurry by mass fraction, the mass fraction of the ceramic hollow microspheres is 20 - 30 wt%, the mass fraction of wollastonite is 25 - 40 wt%, the mass fraction of the flux is 7 - 13 wt%, the mass fraction of the pore former is 1.5 - 4 wt%, the mass fraction of the dispersant is 0.5 - 2.5 wt%, the mass fraction of the plasticizer is 1 - 3 wt%, the mass fraction of the binder is 1 - 3 wt%, and the mass fraction of water is 10 - 25 wt%.

[0030] Among them, the mass fraction of ceramic hollow microspheres can be any value or the range formed by any two values among 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt% and 30wt%; the mass fraction of wollastonite can be any value or the range formed by any two values among 25wt%, 27wt%, 28wt%, 30wt%, 31wt%, 32wt%, 34wt%, 35wt%, 37wt%, 38wt%, 39wt% and 40wt%; the mass fraction of flux can be any value or the range formed by any two values among 7wt%, 8wt%, 9wt%, 10wt%, 11wt%, 12wt% and 13wt%; the mass fraction of pore former can be any value or the range formed by any two values among 1.5wt%, 2wt%, 2.5wt%, 3wt%, 3.5wt% and 4wt%; the mass fraction of dispersant can be any value or the range formed by any two values among 0.5wt%, 1wt%, 1.5wt%, 2wt% and 2.5wt%; the mass fraction of plasticizer can be any value or the range formed by any two values among 1wt%, 1.5wt%, 2wt%, 2.5wt% and 3wt%; the mass fraction of binder can be any value or the range formed by any two values among 1wt%, 1.5wt%, 2wt%, 2.5wt% and 3wt%; the mass fraction of water can be any value or the range formed by any two values among 10wt%, 11wt%, 12wt%, 15wt%, 16wt%, 18wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt% and 25wt%.

[0031] Selecting appropriate mass fractions of each component in the slurry can improve the overall performance of the slurry, while improving the processing performance and production efficiency, reducing raw material consumption and lowering costs.

[0032] In some embodiments, the flux includes zinc oxide powder and glass powder. Among them, the mass fraction of zinc oxide powder in the slurry is 3-6wt%, and the mass fraction of glass powder in the slurry is 4-7wt%.

[0033] Among them, the mass fraction of zinc oxide powder in the slurry can be any value or the range formed by any two values among 3wt%, 3.5wt%, 4wt%, 4.5wt%, 5wt%, 5.5wt% and 6wt%; the mass fraction of glass powder in the slurry can be any value or the range formed by any two values among 4wt%, 4.5wt%, 5wt%, 5.5wt%, 6wt%, 6.5wt% and 7wt%.

[0034] In some embodiments, the pore-forming agent is calcium carbonate (CaCO3). Calcium carbonate is an inorganic material that can decompose to form pores at the initial stage of sintering, and no toxic decomposition products will be volatilized during the decomposition process, which is more environmentally friendly.

[0035] In some embodiments, the dispersant is selected from at least one of ammonium polyacrylate and octylphenoxypolyethoxyethanol.

[0036] In some embodiments, the plasticizer is selected from at least one of dibutyl phthalate (DBP) and polyethylene glycol (PEG).

[0037] In some embodiments, the binder is selected from at least one of sodium silicate, sodium carboxymethyl cellulose, PVA (polyvinyl alcohol), and PVB (polyvinyl butyral) series.

[0038] Among them, B-76 can be selected from the PVB series.

[0039] In some embodiments, the ceramic hollow microspheres are SiO2-Al2O3 hollow microspheres. The average diameter of the SiO2-Al2O3 hollow microspheres is 100-200 μm, and the impurity content is <1%.

[0040] The SiO2-Al2O3 hollow microspheres also act as a kind of pore-forming agent, which can form pores by spontaneous foaming during the high-temperature sintering process, and the particle size distribution is uniform, so that the pore size distribution is uniform after pore formation, which helps to form more through holes and a larger porosity.

[0041] In some embodiments, the steps of sequentially debinding and sintering the green ceramic body to obtain the wollastonite glass-ceramic porous ceramic include:

[0042] Slowly heating the green ceramic body at a heating rate of 0.5-1.5 °C / min, and keeping it at 400-500 °C for 2-4 h for debinding to obtain a debound body;

[0043] Heating the debound body to 1150-1250 °C at a heating rate of 5-8 °C / min, and keeping it at 1150-1250 °C for 2-3 h for sintering to obtain the wollastonite glass-ceramic porous ceramic.

[0044] In this embodiment, the debinding and sintering curve is specifically: slowly heating at a heating rate of 0.5-1.5 °C / min, heating to 400-500 °C, keeping it at 400-500 °C for 2-4 h for debinding, and after debinding, heating to 1150-1250 °C at a heating rate of 5-8 °C / min, and keeping it at 1150-1250 °C for 2-3 h for sintering.

[0045] The sintering temperature of SiO2-Al2O3 hollow microspheres is generally around 1500 °C. The preparation method of the present application significantly reduces the sintering temperature, thereby saving energy consumption and reducing production costs.

[0046] In some embodiments, the forming thickness of the green ceramic body is 0.2-1.0 mm, that is, the slurry is cast on a casting machine to obtain a green ceramic body with a thickness of 0.2-1.0 mm.

[0047] In actual production applications, multiple layers of green ceramic bodies can be stacked and pressed according to the required thickness of the product. The specific pressing conditions are: pressing pressure 10-35 Mpa, pressing time 5-10 min, to form the required green body sample.

[0048] The present application also provides a wollastonite glass-ceramic porous ceramic, which is prepared by the preparation method of the wollastonite glass-ceramic porous ceramic as described above. This method is more environmentally friendly and economical, with higher product consistency, fewer defects, and a high product qualification rate.

[0049] Furthermore, the porosity of the wollastonite glass-ceramic porous ceramic is 40-65%, the through-hole diameter is 20-55 μm, and the strength is 12-35 MPa.

[0050] The wollastonite glass-ceramic porous ceramic product prepared by the present application has both a large porosity and high strength, which is helpful for subsequent processing applications.

[0051] The present application also provides an atomizer, which includes the wollastonite glass-ceramic porous ceramic as described above.

[0052] In this embodiment, the wollastonite glass-ceramic porous ceramic of the present application is applied to the atomizer of an electronic cigarette. The porous ceramic with both a large porosity and high strength helps to optimize the oil guiding speed, atomizer strength, smoke volume, and taste of the electronic cigarette, thereby improving the use efficiency and user experience of the electronic cigarette.

[0053] The following combines specific embodiments to more specifically illustrate the content of the present application and further elaborate on the present application. However, these embodiments are by no means a limitation to the present application.

[0054] Example 1

[0055] This embodiment provides a preparation method of a wollastonite glass-ceramic porous ceramic, including the following steps:

[0056] 1. Slurry pretreatment and tape casting

[0057] SiO2-Al2O3 hollow microspheres with an average diameter of 100 μm and wollastonite, calcium carbonate, zinc oxide, and glass powder with an average particle size of 50 μm are mixed evenly by a three-dimensional mixer to obtain a mixed powder;

[0058] Ammonium polyacrylate, dibutyl phthalate, sodium silicate, and water are added to the mixed powder, and then vacuum stirred in a stirring container for 30 min to obtain a slurry. By mass fraction, in the slurry, SiO2-Al2O3 hollow microspheres contain 30 wt%, wollastonite contains 40 wt%, CaCO3 contains 3 wt%, zinc oxide is 3 wt%, glass powder is 7 wt%, ammonium polyacrylate is 2 wt%, sodium silicate is 1 wt%, dibutyl phthalate is 2 wt%, and deionized water is 12 wt%.

[0059] The slurry is cast on a casting machine to obtain a ceramic green body with a thickness of 0.5 mm. Six layers of the ceramic green bodies are stacked and pressed at a pressure of 20 Mpa in the thickness direction for 10 min to obtain a green body sample with a thickness of 2.5 - 2.8 mm.

[0060] 2. Debinding and sintering

[0061] The above green body sample is slowly heated in an oxidation atmosphere furnace at a heating rate of 1.0 °C / min. When the temperature rises to 430 °C, it is held for 4 h for debinding. After debinding is completed, it is heated to 1200 °C at a heating rate of 6 °C / min and held for 2 h for sintering, and then cooled to room temperature with the furnace to obtain wollastonite glass-ceramic porous ceramics.

[0062] Example 2

[0063] This example provides a method for preparing wollastonite glass-ceramic porous ceramics, including the following steps:

[0064] 1. Slurry pretreatment and tape casting

[0065] SiO2-Al2O3 hollow microspheres with an average diameter of 150 μm and wollastonite, calcium carbonate, zinc oxide, and glass powder with an average particle size of 50 μm are mixed evenly by a three-dimensional mixer to obtain a mixed powder;

[0066] Ammonium polyacrylate, dibutyl phthalate, sodium silicate, and water are added to the mixed powder, and then vacuum stirred in a stirring container for 30 min to obtain a slurry. By mass fraction, in the slurry, SiO2-Al2O3 hollow microspheres contain 25 wt%, wollastonite contains 30 wt%, CaCO3 contains 2 wt%, zinc oxide is 6 wt%, glass powder is 7 wt%, ammonium polyacrylate is 1.5 wt%, sodium silicate is 2.5 wt%, dibutyl phthalate is 3 wt%, and deionized water is 23 wt%.

[0067] The slurry is cast on a casting machine to obtain a ceramic green body with a thickness of 0.7 mm. Six layers of the ceramic green bodies are stacked and pressed at a pressure of 20 Mpa in the thickness direction for 10 min to obtain a green body sample with a thickness of 2.5 - 2.8 mm.

[0068] 2. Debinding and Sintering

[0069] The above green body samples were slowly heated in an oxidation atmosphere furnace at a heating rate of 1.5 °C / min to 500 °C and held for 3 h for debinding. After debinding, it was heated to 1250 °C at a heating rate of 8 °C / min and held for 3 h for sintering, and then cooled to room temperature in the furnace to obtain wollastonite glass-ceramic porous ceramics.

[0070] Example 3

[0071] This example provides a method for preparing wollastonite glass-ceramic porous ceramics, including the following steps:

[0072] 1. Slurry Pretreatment and Tape Casting

[0073] SiO2-Al2O3 hollow microspheres with an average diameter of 200 μm and wollastonite, calcium carbonate, zinc oxide, and glass powder with an average particle size of 50 μm were mixed evenly by a three-dimensional mixer to obtain a mixed powder;

[0074] Ammonium polyacrylate, dibutyl phthalate, sodium silicate, and water were added to the mixed powder and stirred in a vacuum for 30 min in a stirring container to obtain a slurry; by mass fraction, in the slurry, SiO2-Al2O3 hollow microspheres contain 20 wt%, wollastonite contains 35 wt%, CaCO3 contains 4 wt%, zinc oxide is 5 wt%, glass powder is 6 wt%, ammonium polyacrylate is 2.5 wt%, sodium silicate is 1.5 wt%, dibutyl phthalate is 1 wt%, and deionized water is 25 wt%;

[0075] The slurry was tape cast on a tape casting machine to obtain a ceramic green body with a thickness of 1.0 mm. Six layers of ceramic green bodies were stacked and pressed at a pressure of 20 Mpa for 10 min in the thickness direction to obtain a green body sample with a thickness of 2.5 - 2.8 mm.

[0076] 2. Debinding and Sintering

[0077] The above green body samples were slowly heated in an oxidation atmosphere furnace at a heating rate of 1.0 °C / min to 400 °C and held for 4 h for debinding. After debinding, it was heated to 1150 °C at a heating rate of 7 °C / min and held for 2.5 h for sintering, and then cooled to room temperature in the furnace to obtain wollastonite glass-ceramic porous ceramics.

[0078] The wollastonite glass-ceramic porous ceramics prepared in the above examples were subjected to performance tests, and the test results are shown in Table 1.

[0079] Table 1 Test Results

[0080] Product Porosity (%) Average through-hole diameter (μm) Flexural strength (MPa) Example 1 63.2％ 31.03 27.60 MPa Example 2 58.7％ 42.06 34.20 MPa Example 3 60.4％ 37.26 29.80 MPa

[0081] The test results of Examples 1-3 show that by using the preparation method of wollastonite glass-ceramic porous ceramics provided in this application, the porosity of the prepared wollastonite glass-ceramic porous ceramics is 40-65%, and preferably 55-65%. The through-hole diameter is 20-55 μm, and the flexural strength is 12-35 MPa, and preferably 20-35 MPa. It can be seen that the product prepared by the preparation method of wollastonite glass-ceramic porous ceramics of this application has good performance characteristics and is suitable for uses such as the preparation of atomizers; moreover, this method has low cost, simple process and easy operation, and is suitable for large-scale production.

[0082] Obviously, the above-described embodiments are only a part of the embodiments of this application, rather than all the embodiments. The accompanying drawings show the preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Although this application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of this application in other related technical fields shall be equally within the scope of the patent protection of this application.

Claims

1. A method for preparing wollastonite glass-ceramics porous ceramics, characterized in that: The following steps are involved: The ceramic hollow microspheres, wollastonite, flux and pore-forming agent are uniformly mixed to obtain a mixed powder; Adding a dispersant, a plasticizer, a binder and water to the mixed powder and stirring evenly to obtain a slurry; Casting the slurry to obtain a ceramic green body; The ceramic green body is sequentially debinded and sintered to obtain wollastonite glass-ceramics porous ceramics.

2. The method for preparing wollastonite glass-ceramics porous ceramics according to claim 1, characterized in that: In the slurry, the mass fraction of the ceramic hollow microspheres is 20-30wt%, the mass fraction of the wollastonite is 25-40wt%, the mass fraction of the flux is 7-13wt%, the mass fraction of the pore former is 1.5-4wt%, the mass fraction of the dispersant is 0.5-2.5wt%, the mass fraction of the plasticizer is 1-3wt%, the mass fraction of the binder is 1-3wt%, and the mass fraction of water is 10-25wt%.

3. The method for preparing wollastonite glass-ceramics porous ceramics according to claim 2, characterized in that: The flux comprises zinc oxide powder and glass powder, wherein the mass fraction of the zinc oxide powder in the slurry is 3-6wt%, and the mass fraction of the glass powder in the slurry is 4-7wt%.

4. The method for preparing wollastonite glass-ceramics porous ceramics according to claim 2, characterized in that: The pore-forming agent is calcium carbonate; and / or, The dispersant is selected from at least one of ammonium polyacrylate and polyethylene glycol octylphenyl ether; and / or, The plasticizer is selected from at least one of dibutyl phthalate and polyethylene glycol; and / or, The binder is selected from at least one of water glass, sodium carboxymethyl cellulose, PVA and PVB series.

5. The method for preparing wollastonite glass-ceramics porous ceramics according to any one of claims 1 to 4, characterized in that: The ceramic hollow microspheres are SiO2-Al2O3 hollow microspheres, the average diameter of the SiO2-Al2O3 hollow microspheres is 100-200 μm, and the impurity content is less than 1%.

6. The method for preparing wollastonite glass-ceramics porous ceramics according to any one of claims 1 to 4, characterized in that: The step of sequentially debinding and sintering the ceramic green body to obtain wollastonite glass-ceramics porous ceramics comprises: Slowly heating the ceramic green body at a heating rate of 0.5-1.5° C. / min, and maintaining the temperature at 400-500° C. for 2-4 hours to perform debinding, thereby obtaining a debinding green body; The debinding green body is heated to 1150-1250° C. at a rate of 5-8° C. / min, and sintered at 1150-1250° C. for 2-3 hours to obtain wollastonite glass-ceramics porous ceramics.

7. The method for preparing wollastonite glass-ceramics porous ceramics according to claim 1, characterized in that: The molding thickness of the ceramic green body is 0.2-1.0 mm.

8. A wollastonite glass-ceramic porous ceramic, characterized in that: The wollastonite glass-ceramic porous ceramic is prepared by the preparation method of the wollastonite glass-ceramic porous ceramic according to any one of claims 1 to 7.

9. The wollastonite glass-ceramic porous ceramic according to claim 8, characterized in that: The wollastonite glass-ceramic porous ceramic has a porosity of 40-65%, a through-hole diameter of 20-55 μm, and a flexural strength of 12-35 MPa.

10. An atomizer, characterized in that: The atomizer comprises the wollastonite glass-ceramic porous ceramic according to claim 8 or 9.

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