WO2023284424A1

WO2023284424A1 - Atomizing core, porous ceramic, and method for preparing porous ceramic

Info

Publication number: WO2023284424A1
Application number: PCT/CN2022/095054
Authority: WO
Inventors: 宋文正; 聂革; 齐会龙; 胡勇齐; 李俊辉; 丁磊
Original assignee: 深圳市吉迩科技有限公司
Priority date: 2021-07-16
Filing date: 2022-05-25
Publication date: 2023-01-19
Also published as: CN113563058A

Abstract

Disclosed in the present invention are an atomizing core, a porous ceramic, and a method for preparing the porous ceramic. The method for preparing the porous ceramic comprises the steps of: mixing at least two diatomites with different particle sizes to form a raw material; mixing the raw material, a sintering aid, a reinforcing agent, and a pore-forming agent to form a mixed material; mixing at least two binders to form a wax block; mixing the mixed material with the wax block to form a ceramic material; preparing a green body from the ceramic material by means of an injection molding process; and degreasing and sintering the green body to form the porous ceramic. By preparing the wax block and the mixed material in advance, the powder materials can be mixed more uniformly, and then the pore diameter of the prepared porous ceramic is uniform; by matching the particle size of the diatomites, gaps can be filled with the diatomite particles having a smaller particle size, such that the porous ceramic has a higher porosity and a better pore diameter ratio; and the green body is prepared by means of injection molding, such that the preparation process is simple and convenient, the process flow is simple, and mass production thereof can be easily realized.

Description

Atomization core, porous ceramic and preparation method of porous ceramic

technical field

The invention relates to the technical field of atomization devices, in particular to an atomization core, a porous ceramic and a method for preparing the porous ceramic.

Background technique

Porous ceramic material is a widely used ceramic material. Its unique three-dimensional porous structure makes it have high porosity, good chemical stability, and small volume. It is used in many fields.

At present, when preparing porous ceramic materials, diatomite is usually used as the main body, and a certain binder and pore-forming agent are added for sintering. However, due to the unavoidable gaps between adjacent diatomite particles, the green body formed using diatomite has a low density, resulting in low porosity of the porous ceramic.

On the other hand, in the prior art, hot die-casting is often used to make green bodies. Due to the large difference in particle size and density between diatomite, binder, and pore-forming agent, the uniformity of the material in the molding process is poor. , is not conducive to efficient automated production.

Contents of the invention

The invention provides an atomizing core, a porous ceramic and a preparation method of the porous ceramic to solve the technical problems of low porosity and low production efficiency of the porous ceramic.

In order to solve the above-mentioned technical problems, a technical solution adopted in the present invention is to provide a preparation method of porous ceramics, comprising:

mixing diatomaceous earth of at least two different particle sizes to form a raw material;

Mixing the raw materials, sintering aid, reinforcing agent and pore forming agent to form a mixture;

mixing at least two binders to form a wax block;

mixing the mixture with the wax block to form a ceramic material;

Using the ceramic material to prepare a green body through an injection molding process; and

The body is degreased and sintered to form the porous ceramic.

Optionally, the step of mixing at least two diatomites with different particle sizes to form raw materials includes:

At least two diatomites with different particle sizes are selected, and the types of diatomite include 300-mesh diatomite, 600-mesh diatomite, 900-mesh diatomite and 1200-mesh diatomite;

Drying the at least two diatomites with different particle sizes;

Add the at least two diatomites with different particle sizes into the ball mill according to the ratio, and add balls with a mass ratio of 1:2, and ball mill for 1 hour to form the raw material.

Optionally, the step of adding the diatomite of at least two different particle sizes into the ball mill according to the proportion comprises:

In terms of mass percentage, 0%-40% of the 300-mesh diatomite, 10%-30% of the 600-mesh diatomite, 10%-50% of the 900-mesh diatomite, 0%-30% of the 1200 mesh diatomite is added into the ball mill.

Optionally, the step of mixing the raw materials, sintering aid, reinforcing agent and pore forming agent to form a mixture comprises:

In terms of mass percentage, 30%-60% of the raw materials, 5%-30% of the sintering aid, 2%-15% of the reinforcing agent, 15%-35% of the The hole agent is added to the mixer;

Under the condition of rotating speed of 80-120 rpm, mix for 2-4 hours to form a mixture.

Optionally, the step of mixing at least two binders to form a wax block comprises:

Weigh at least two of paraffin wax, beeswax and polyethylene according to the proportion, put them into a wax mixer, and mix them at 100-140°C for 3-5 hours to form a wax liquid; and

The wax liquid was filtered using a copper screen, and the wax liquid was cooled to form a wax block.

Optionally, the step of weighing at least two of paraffin wax, beeswax and polyethylene in proportion and putting them into a wax mixer, and mixing them at 100-140°C for 3-5 hours to form a wax liquid comprises:

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

Put 50%-70% of the paraffin into the mixing cavity of the wax mixer in terms of mass percentage;

After the paraffin is completely melted, add 15%-25% of the beeswax;

After the beeswax is completely melted, stop stirring, add 2%-9% of the polyethylene, and close the mixing chamber for 0.5-1 hour; and

Continue stirring to mix for 2-3 hours.

Optionally, the step of mixing the mixture and the wax block to form a ceramic material includes:

Putting 25%-45% of the wax block into a 100°C internal mixer in terms of mass percentage;

After the wax block is completely melted, the temperature of the internal mixer is set to 90-130°C; and

Add the mixture in 5-10 times, and stir and mix for 15-20 hours.

Optionally, the step of degreasing and sintering the green body to form the porous ceramic includes:

Raise the temperature of the green body to 140-180°C at 6-30°C/h;

Raise the temperature of the green body to 320-350°C at 20-50°C/h;

Raise the temperature of the green body to 450-500°C at 40-90°C/h;

Raise the temperature of the green body to 580-620°C at 80-160°C/h;

Raise the temperature of the green body to 800-900°C at 140-220°C/h;

The green body is heated at 100-150°C/h to 1000-1200°C and kept for 1-3 hours.

In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a porous ceramic, which is prepared by the method for preparing porous ceramic mentioned above.

Drying the at least two diatomites with different particle sizes;

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

After the paraffin is completely melted, add 15%-25% of the beeswax;

Continue stirring to mix for 2-3 hours.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide an atomizing core, which is made of the aforementioned porous ceramics.

Drying the at least two diatomites with different particle sizes;

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

After the paraffin is completely melted, add 15%-25% of the beeswax;

Continue stirring to mix for 2-3 hours.

The beneficial effects of the present invention are: the present invention can make the mixing between the powder materials more uniform by preparing the wax block and the mixture in advance, and then make the pore diameter of the prepared porous ceramic uniform; Diatomaceous earth particles with smaller particle size fill the gap, so that the porous ceramic has a higher porosity and a better pore size ratio; and the green body is prepared by injection molding, which can make the preparation process simple and convenient. The process is simple and easy for mass production.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is the preparation flowchart of the porous ceramics in an embodiment of the present application;

FIG. 2 is a schematic flowchart of step S12 in FIG. 1 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a flow chart of the preparation of porous ceramics in an embodiment of the present application. The application discloses a preparation method of porous ceramics, comprising the following steps:

Step S10: Mixing at least two diatomites with different particle sizes to form a raw material.

Among them, diatomaceous earth is the biological remains of ancient living diatoms. Its main component is silicon dioxide. Its particle shape is complex and diverse, and its size is micron. In view of the above-mentioned material and structural characteristics of diatomite, it has the advantages of large specific surface area, high porosity, high adsorption, high slow release, low density, high temperature resistance, and corrosion resistance. Considering the silicon dioxide component of diatomite, its particles are bonded to each other under the action of hydrofluoric acid etching, and then can be solidified and formed into a complex, lightweight, porous structure under the constraints of a mold, which is a great opportunity for the preparation of both The porous ceramic atomizing core with bionic non-smooth surface and internal adsorption and slow-release channels provides an effective way.

Specifically, the types of diatomite used for selection may include 300-mesh diatomite, 600-mesh diatomite, 900-mesh diatomite and 1200-mesh diatomite. The mesh number is the number of holes, which is the number of holes per inch. The larger the mesh number, the smaller the aperture. Generally speaking, the number of meshes x pore size (number of microns) = 15000. For example, the pore size of 500-mesh diatomite is about 30 microns; the pore size of 600-mesh diatomite is about 25 microns; the pore size of 900-mesh diatomite is about 17 microns. By using at least two diatomites with different particle sizes for particle size matching, diatomite particles with smaller particle sizes can be used to fill the gap, not only can obtain a better pore size ratio, but also can obtain denser particle accumulation. , to obtain a higher porosity.

Further, after the diatomite is selected, the diatomite can be dried to remove excess water. Then according to the mass percentage, 0%-40% of 300 mesh diatomite, 10%-30% of 600 mesh diatomite, 10%-50% of 900 mesh diatomite, 0%-30 % of 1200-mesh diatomite is added to the ball mill, and then balls with a mass ratio of 1:2 are added, and the ball is milled for 1 hour, and collected for later use. In this way, the raw material can be prepared.

After the diatomite is mixed and ball-milled to form the raw material, step S11 can be continued: mixing the raw material, sintering aid, reinforcing agent and pore-forming agent to form a mixture.

Wherein, the sintering aid includes any one of kaolin and tourmaline, the reinforcing agent includes any one of glass powder and vermiculite, and the pore-forming agent includes one or both of wood chips, starch, calcium carbonate, and graphite powder.

Specifically, before the raw materials are mixed, the sintering aid, reinforcing agent and pore-forming agent can be dried separately to remove excess water. Then weigh 5%-30% of the sintering aid, 2%-15% of the reinforcing agent, and 15%-35% of the pore-forming agent into the mixer, and then weigh 30%- Add 60% of the raw materials into the mixer; then mix for 2-4 hours at a rotating speed of 80-120 rpm, and collect them for later use. In this way, a mixture can be formed.

Further, as shown in FIG. 1 , after the mixture is obtained, step S12 may be continued: mixing at least two binders to form a wax block.

Specifically, the adhesive can be selected from two or three of paraffin wax, beeswax and polyethylene. As shown in Figure 2, the steps of mixing at least two binders to form a wax block include:

Step S121: Weigh at least two of paraffin wax, beeswax and polyethylene according to the proportion, put them into a wax mixer, and mix them at 100-140° C. for 3-5 hours to form a wax liquid.

Specifically, the temperature of the wax mixer can be set at 100-140° C., and the rotation speed is 25 rpm; then 50%-70% of the paraffin wax is put into the mixing chamber of the wax mixer in terms of mass percentage. Medium; after the paraffin wax is completely melted, add 15%-25% beeswax; after the beeswax is completely melted, stop stirring, add 2%-9% polyethylene, and close the mixing chamber for 0.5-1 hour; then continue to stir and mix for 2- 3 hours. In this way, at least two kinds of binders can be fully mixed evenly.

After the homogeneously mixed wax liquid is obtained, step S122 may be continued: filtering the wax liquid with a copper sieve, and cooling the wax liquid to form a wax block.

Specifically, after the wax liquid is fully mixed, the wax liquid can be filtered with a 100-mesh copper screen to remove impurities in the wax liquid, and then the filtered wax liquid can be cooled to form a large wax block.

Optionally, the wax liquid can be cooled by natural cooling. Of course, in order to improve production efficiency, cooling equipment can also be used to cool the wax liquid.

Further, in order to facilitate the use of the wax block, after the cooling of the wax block is completed, the wax block can be cut to form small pieces of wax block, which not only facilitates the mixing of the wax block with raw materials, but also reduces the melting of the wax block. time, but also allows easy access to the appropriate weight of the wax block.

As mentioned above, the embodiment of the present invention prepares the wax block and the mixture in advance, so that the powder can be mixed more uniformly.

After the mixture and the wax block are produced, proceed to step S13: mixing the mixture and the wax block to form a ceramic material.

Specifically, 25%-45% of the wax block can be put into the internal mixer at 100°C according to the mass percentage; after the wax block is completely melted, the temperature of the internal mixer is set at 90-130°C ℃; add the mixture in 5-10 times, stir and mix for 15-20 hours.

Among them, 25%-45% of the wax block and 55%-75% of the mixed material can be weighed out, and then the mixed material is divided into 5-10 parts. First put all the wax blocks into a 100°C internal mixer, the wax blocks are heated and melted, increase and adjust the temperature of the internal mixer to 90-130°C, then gradually add the mixture, stir and mix while adding, this process can continue 15-20 hours, in this way, the mixture and the wax block can be completely mixed evenly.

After the mixed ceramic material is obtained, step S14 is then performed: using the ceramic material to prepare a green body through an injection molding process.

Specifically, the ceramic material can be put into the injection molding machine, the parameters of the machine can be set, and the green body can be prepared through the injection molding process.

After the green body is obtained, step S15 is performed: degreasing and sintering the green body to form porous ceramics.

Specifically, the green body can be put into a heating furnace, and then the temperature is raised to 140-180°C at 6-30°C/h; then the temperature is raised to 320-350°C at 20-50°C/h; /h to 450-500°C; then to 80-160°C/h to 580-620°C; then to 140-220°C/h to 800-900°C; then to 100-150°C/h to 1000°C -1200°C, and keep it warm for 1-3 hours, the porous ceramics are prepared. In the embodiment of the present invention, the stability of the porous ceramic can be improved by sintering with variable temperature rise.

Understandably, in other embodiments, step S12 may also be performed first to prepare a wax block, and then step S10 and step S11 are performed to form a mixture. Alternatively, step S12, step S10, and step S11 can also be performed at the same time. At this time, the wax block and the mixture can be obtained at the same time, so as to improve the production efficiency of the porous ceramic.

The preparation method of the above-mentioned porous ceramics has at least the following advantages:

1) By preparing the wax block and the mixture in advance, the powder can be mixed more evenly, thereby making the pore size of the prepared porous ceramic uniform;

2) By matching the particle size of diatomite, the gap can be filled with diatomite particles of smaller particle size, so that the porous ceramic has a higher porosity and a better pore size ratio can be obtained;

3) By using injection molding to prepare the body, the preparation process can be simple and convenient, the process flow is simple, and mass production is easy;

4) The stability of the porous ceramic can be made good by sintering the green body through step-by-step temperature rise.

Another aspect of the present application also provides a porous ceramic, which can be prepared by the above-mentioned preparation method of the porous ceramic.

In yet another aspect of the present application, an atomizing core is provided, and the atomizing core is made of the aforementioned porous ceramic. The atomizing core can be arranged in the atomizing device for atomizing liquid.

The following is the specific embodiment part:

Example 1:

The preparation method of a kind of porous ceramics of the present embodiment is as follows:

(1) By mass percentage, weigh 70% paraffin, 23% beeswax, and 7% polyethylene. Set the temperature of the wax mixer to 120°C and the speed to 25 rpm. Put in the paraffin first, and then add the beeswax after the paraffin is completely melted. After the beeswax is completely melted, stop stirring, add polyethylene, and close the mixing chamber for 1 hour, then Stirring was continued for 3 hours. After mixing, use a 100-mesh copper sieve to filter the wax liquid. After the wax liquid cools down, divide it into small wax blocks for later use.

(2) In terms of mass percentage, weigh 50% of 300 mesh diatomite, weigh 20% of 600 mesh diatomite, weigh 30% of 900 mesh diatomite, put it into a ball mill, add mass Grinding balls with a ratio of 1:2, milled for 1 hour, collected after milling for later use.

(3) In terms of mass percentage, weigh 50% of the mixed diatomite, weigh 5% of kaolin, weigh 13% of glass powder, weigh 2% of calcium carbonate, weigh 30% of 300-mesh wood chips were added to the mixer, and mixed for 4 hours at a speed of 100 rpm, and collected after the mixing was completed for later use.

(4) In terms of mass percentage, weigh 70% of the mixture and 30% of the wax block, first put the wax block into a 120°C internal mixer, and after it is completely melted, set the temperature to 90°C . The mixture was added in 8 portions and stirring was continued for 18 hours. After mixing, granulate and collect for later use.

(5) Put the ceramic granulation material into the injection molding machine, set the parameters of the machine, and prepare the green body through the injection molding process.

(6) The ceramic green body is sintered with variable temperature and elevated temperature. 20°C/h to 150°C, then 30°C/h to 330°C, 50°C/h to 500°C, 65°C/h to 600°C, and 150°C/h to 900°C, then raised to 1160°C at a rate of 100°C/h, and kept at this temperature for 1 hour to obtain the porous ceramics.

Example 2:

(1) By mass percentage, weigh 72% paraffin, 25% beeswax, and 3% polyethylene. Set the temperature of the wax mixer to 110°C and the speed to 25 rpm. Put in the paraffin first, and then add the beeswax after the paraffin is completely melted. After the beeswax is completely melted, stop stirring, add polyethylene, and close the mixing chamber for 1 hour, then Stirring was continued for 3 hours. After mixing, use a 100-mesh copper sieve to filter the wax liquid. After the wax liquid cools down, divide it into small wax blocks for later use.

(2) In terms of mass percentage, weigh 15% of 300 mesh diatomite, weigh 23% of 600 mesh diatomite, weigh 50% of 900 mesh diatomite, weigh 12% of 1200 mesh Put the diatomite into a ball mill, add balls with a mass ratio of 1:2, and mill for 1 hour. After the ball milling, collect it for later use.

(3) In terms of mass percentage, weigh 45% of the mixed diatomite, weigh 3% of kaolin, weigh 3% of tourmaline, weigh 17% of glass powder, weigh 17% of Starch, weighing 15% of 300-mesh sawdust, added to a mixer, and mixed for 4 hours at a speed of 100 rpm, collected after mixing for future use.

(4) In terms of mass percentage, weigh 66% of the mixture and 34% of the wax block, first put the wax block into a 120°C internal mixer, and after it is completely melted, set the temperature to 90°C . The mixture was added in 8 portions and stirring was continued for 16 hours. After mixing, granulate and collect for later use.

(6) The ceramic green body is sintered with variable temperature and elevated temperature. 10°C/h to 140°C, then 20°C/h to 350°C, 40°C/h to 500°C, 80°C/h to 600°C, then 150°C/h to 900°C, then raised to 1165°C at a rate of 100°C/h, and kept at this temperature for 1 hour to obtain the porous ceramics.

Example 3:

(1) By mass percentage, weigh 71% paraffin, 20% beeswax, and 9% polyethylene. Set the temperature of the wax mixer to 130°C and the speed to 25 rpm, put in paraffin first, then add beeswax after the paraffin is completely melted, stop stirring after the beeswax is completely melted, add polyethylene, close the mixing chamber for 1 hour, and then Stirring was continued for 3 hours. After mixing, use a 100-mesh copper sieve to filter the wax liquid. After the wax liquid cools down, divide it into small wax blocks for later use.

(2) In terms of mass percentage, weigh 43% of 300 mesh diatomite, weigh 36% of 600 mesh diatomite, weigh 21% of 900 mesh diatomite, put into a ball mill, add mass Grinding balls with a ratio of 1:2, milled for 1 hour, collected after milling for later use.

(3) By mass percentage, weigh 40% of the mixed diatomite, weigh 8% of tourmaline, weigh 6% of glass powder, weigh 11% of vermiculite, weigh 5% Calcium carbonate, weighing 30% of the starch, added to the mixer, under the condition of 100 rpm at a rotating speed, mixed for 4 hours, collected after the mixing was completed for subsequent use.

(4) In terms of mass percentage, weigh 73% of the mixture and 27% of the wax block, first put the wax block into a 120°C internal mixer, and after it is completely melted, set the temperature to 100°C . Add the mixture again in 8 portions and continue to stir for 20 hours. After mixing, granulate and collect for later use.

(6) The ceramic green body is sintered with variable temperature and elevated temperature. The temperature is raised to 150°C at 25°C/h, then to 340°C at 40°C/h, then to 500°C at 50°C/h, then to 600°C at 70°C/h, and then to 150°C/h to 900°C, then raise the temperature to 1150°C at a rate of 100°C/h, and keep the temperature for 1 hour to obtain the porous ceramics.

In order to verify the properties of the porous ceramics prepared in the above embodiments, the porous ceramics were detected, and the results are as follows:

Porosity % Pore diameter um Strength MPa Example 162227.3 Example 267266.2 Example 359208.5

Therefore, from the detection results of the above porosity, pore diameter and strength, it can be seen that the porosity of the porous ceramics prepared in the embodiment of the present invention can basically reach more than 55%; and the pore diameter of the porous ceramics can basically reach 20%. Micron. In addition, the strength of the porous ceramic prepared in the embodiment of the present invention is above 6 MPa, so it can have a higher structural strength.

The above is only an embodiment of the present invention, and does not limit the scope of patents of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

Claims

A method for preparing porous ceramics, characterized in that it comprises:

mixing diatomaceous earth of at least two different particle sizes to form a raw material;

Mixing the raw materials, sintering aid, reinforcing agent and pore forming agent to form a mixture;

mixing at least two binders to form a wax block;

mixing the mixture with the wax block to form a ceramic material;

Using the ceramic material to prepare a green body through an injection molding process; and

The body is degreased and sintered to form the porous ceramic.
The method for preparing porous ceramics according to claim 1, wherein the step of mixing at least two diatomites with different particle sizes to form raw materials comprises:

At least two diatomites with different particle sizes are selected, and the types of diatomite include 300-mesh diatomite, 600-mesh diatomite, 900-mesh diatomite and 1200-mesh diatomite;

Drying the at least two diatomites with different particle sizes;

Add the at least two diatomites with different particle sizes into the ball mill according to the ratio, and add balls with a mass ratio of 1:2, and ball mill for 1 hour to form the raw material.
The preparation method of porous ceramics according to claim 2, wherein the step of adding diatomite of at least two different particle sizes into the ball mill according to the proportion comprises:

In terms of mass percentage, 0%-40% of the 300-mesh diatomite, 10%-30% of the 600-mesh diatomite, 10%-50% of the 900-mesh diatomite, 0%-30% of the 1200 mesh diatomite is added into the ball mill.
The method for preparing porous ceramics according to claim 1, wherein the step of mixing the raw materials, sintering aid, reinforcing agent and pore-forming agent to form a mixture comprises:

In terms of mass percentage, 30%-60% of the raw materials, 5%-30% of the sintering aid, 2%-15% of the reinforcing agent, 15%-35% of the The hole agent is added to the mixer;

Under the condition of rotating speed of 80-120 rpm, mix for 2-4 hours to form a mixture.
The preparation method of porous ceramics according to claim 1, is characterized in that, the described step of mixing at least two kinds of binding agents to form a wax block comprises:

Weigh at least two of paraffin wax, beeswax and polyethylene according to the proportion, put them into a wax mixer, and mix them at 100-140°C for 3-5 hours to form a wax liquid; and

The wax liquid was filtered using a copper screen, and the wax liquid was cooled to form a wax block.
The method for preparing porous ceramics according to claim 5, wherein at least two of the paraffin wax, beeswax and polyethylene weighed in proportion are put into a wax mixer and mixed at 100-140°C The steps to form a wax solution in 3-5 hours include:

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

Put 50%-70% of the paraffin into the mixing cavity of the wax mixer in terms of mass percentage;

After the paraffin is completely melted, add 15%-25% of the beeswax;

After the beeswax is completely melted, stop stirring, add 2%-9% of the polyethylene, and close the mixing chamber for 0.5-1 hour; and

Continue stirring to mix for 2-3 hours.
The method for preparing porous ceramics according to claim 1, wherein the step of mixing the mixture with the wax block to form a ceramic material comprises:

Putting 25%-45% of the wax block into a 100°C internal mixer in terms of mass percentage;

After the wax block is completely melted, the temperature of the internal mixer is set to 90-130°C; and

Add the mixture in 5-10 times, and stir and mix for 15-20 hours.
The preparation method of porous ceramics according to claim 1, wherein the step of degreasing and sintering the green body to form the porous ceramics comprises:

Raise the temperature of the green body to 140-180°C at 6-30°C/h;

Raise the temperature of the green body to 320-350°C at 20-50°C/h;

Raise the temperature of the green body to 450-500°C at 40-90°C/h;

Raise the temperature of the green body to 580-620°C at 80-160°C/h;

Raise the temperature of the green body to 800-900°C at 140-220°C/h;

The green body is heated at 100-150°C/h to 1000-1200°C and kept for 1-3 hours.
A porous ceramic, characterized in that the porous ceramic is prepared by the preparation method of the porous ceramic according to claim 1.
A kind of porous ceramic according to claim 9, characterized in that, the step of mixing diatomite of at least two different particle sizes to form raw materials comprises:

At least two diatomites with different particle sizes are selected, and the types of diatomite include 300-mesh diatomite, 600-mesh diatomite, 900-mesh diatomite and 1200-mesh diatomite;

Drying the at least two diatomites with different particle sizes;

Add the at least two diatomites with different particle sizes into the ball mill according to the ratio, and add balls with a mass ratio of 1:2, and ball mill for 1 hour to form the raw material.
A kind of porous ceramic according to claim 10, characterized in that, the step of adding diatomite of at least two kinds of different particle sizes into the ball mill according to the proportion comprises:

In terms of mass percentage, 0%-40% of the 300-mesh diatomite, 10%-30% of the 600-mesh diatomite, 10%-50% of the 900-mesh diatomite, 0%-30% of the 1200 mesh diatomite is added into the ball mill.
A kind of porous ceramic according to claim 9, characterized in that, the step of mixing the raw material, sintering aid, reinforcing agent and pore-forming agent to form a mixture comprises:

In terms of mass percentage, 30%-60% of the raw materials, 5%-30% of the sintering aid, 2%-15% of the reinforcing agent, 15%-35% of the The hole agent is added to the mixer;

Under the condition of rotating speed of 80-120 rpm, mix for 2-4 hours to form a mixture.
A kind of porous ceramic according to claim 9, characterized in that, the step of mixing at least two binders to form a wax block comprises:

Weigh at least two of paraffin wax, beeswax and polyethylene according to the proportion, put them into a wax mixer, and mix them at 100-140°C for 3-5 hours to form a wax liquid; and

The wax liquid was filtered using a copper screen, and the wax liquid was cooled to form a wax block.
A kind of porous ceramics according to claim 13, characterized in that, at least two of the paraffin wax, beeswax and polyethylene weighed in proportion are put into a wax mixer, and mixed at 100-140°C for 3 - 5 hours The steps to form a wax solution include:

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

Put 50%-70% of the paraffin into the mixing cavity of the wax mixer in terms of mass percentage;

After the paraffin is completely melted, add 15%-25% of the beeswax;

After the beeswax is completely melted, stop stirring, add 2%-9% of the polyethylene, and close the mixing chamber for 0.5-1 hour; and

Continue stirring to mix for 2-3 hours.
An atomization core, characterized in that the atomization core is made of the porous ceramic according to claim 9.
The atomizing core according to claim 15, characterized in that, the step of mixing at least two diatomites with different particle sizes to form raw materials comprises:

At least two diatomites with different particle sizes are selected, and the types of diatomite include 300-mesh diatomite, 600-mesh diatomite, 900-mesh diatomite and 1200-mesh diatomite;

Drying the at least two diatomites with different particle sizes;

Add the at least two diatomites with different particle sizes into the ball mill according to the ratio, and add balls with a mass ratio of 1:2, and ball mill for 1 hour to form the raw material.
The atomizing core according to claim 16, wherein the step of adding the at least two diatomites with different particle sizes into the ball mill according to the proportion comprises:

In terms of mass percentage, 0%-40% of the 300-mesh diatomite, 10%-30% of the 600-mesh diatomite, 10%-50% of the 900-mesh diatomite, 0%-30% of the 1200 mesh diatomite is added into the ball mill.
The atomizing core according to claim 15, characterized in that, the step of mixing the raw material, sintering aid, reinforcing agent and pore forming agent to form a mixture comprises:

In terms of mass percentage, 30%-60% of the raw materials, 5%-30% of the sintering aid, 2%-15% of the reinforcing agent, 15%-35% of the The hole agent is added to the mixer;

Under the condition of rotating speed of 80-120 rpm, mix for 2-4 hours to form a mixture.
The atomizing core according to claim 15, wherein the step of mixing at least two binders to form a wax block comprises:

Weigh at least two of paraffin wax, beeswax and polyethylene according to the proportion, put them into a wax mixer, and mix them at 100-140°C for 3-5 hours to form a wax liquid; and

The wax liquid was filtered using a copper screen, and the wax liquid was cooled to form a wax block.
The atomizing core according to claim 19, characterized in that at least two of the paraffin wax, beeswax and polyethylene weighed according to the proportion are put into the wax mixer and mixed under the condition of 100-140°C The steps to form a wax solution in 3-5 hours include:

Set the temperature of the wax mixer to 100-140°C and the speed to 25 rpm;

Put 50%-70% of the paraffin into the mixing cavity of the wax mixer in terms of mass percentage;

After the paraffin is completely melted, add 15%-25% of the beeswax;

After the beeswax is completely melted, stop stirring, add 2%-9% of the polyethylene, and close the mixing chamber for 0.5-1 hour; and

Continue stirring to mix for 2-3 hours.