CN115368162A - Preparation method of three-dimensional interconnected porous ceramic atomizing core - Google Patents
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention discloses a preparation method of a three-dimensional communicated porous ceramic atomizing core, which comprises the following steps: mixing the skeleton material, the pore-forming agent and the binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, uniformly mixing, and forming the obtained three-dimensional porous ceramic slurry into a ceramic blank; and drying and sintering the obtained green body to obtain the three-dimensional porous ceramic atomizing core. The porous ceramic atomizing core provided by the invention has three holes with different sizes, and the three holes are communicated with each other, so that the porous ceramic atomizing core has large oil storage capacity and high oil absorption speed, and has better shape stability after oil absorption. The method for preparing the porous ceramic atomizing core is simple and effective, the used raw materials are low in cost, and starch in the raw materials can serve as a pore-forming agent and a binder in the preparation process.
Description
Technical Field
The invention belongs to the technical field of atomization core preparation processes, and particularly relates to a preparation method of a three-dimensional interconnected porous ceramic atomization core.
Background
The atomizing core is used as a core component of the atomizer, has very important influence on the atomizer, and is required to have strong liquid storage capacity, high liquid guiding speed and certain strength. The performance of the atomizing core is mainly influenced by the porosity and the pore size distribution, and the porosity mainly influences the liquid storage capacity; the pore size distribution influences the oil guiding rate and the liquid atomization effect, the smaller the pore size is, the faster the liquid guiding speed is due to stronger capillary force, and meanwhile, the thinner the steam flow formed by liquid drop atomization is, the thinner the formed aerosol particles are, and the better the dispersion effect is. Because the liquid storage capacity is guaranteed, the porous ceramic hole structure used for the atomizing core on the market at present is single, the pore diameter is generally large, and the problem results in that the taste of products such as electronic cigarettes on the market is generally poor. And because the oil guiding performance and the strength of the porous ceramic can not be considered at the same time, the strength of the ceramic is reduced due to large pore diameter, but the porosity is reduced due to small pore diameter, the liquid storage capacity is obviously reduced, and burnt mouthfeel can appear. Such problems have consistently limited the development of electronic cigarettes and medical nebulizers.
Disclosure of Invention
The invention aims to provide a preparation method of a three-dimensional communicated porous ceramic atomizing core, which solves the problems of single pore diameter and low oil absorption rate of the conventional ceramic atomizing core.
The technical scheme adopted by the invention is that the preparation method of the three-dimensional interconnected porous ceramic atomizing core is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
and 3, drying the obtained blank, and then sintering to obtain the three-dimensional porous ceramic atomizing core.
The present invention is also characterized in that,
in the step 1, the mixture comprises the following components in percentage by mass: 30-60% of framework material, 10-40% of pore-forming agent and 10-30% of binder, wherein the sum of the mass fractions of the components is 100%; the solid content of the non-Newtonian fluid is 60% -70%; the solvent is water.
In the step 1, the framework material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is any one of soluble starch, potato starch, corn starch, pea starch and sweet potato starch.
In the step 2, the forming mode is any one of slip casting, roll forming and dry pressing.
When the material is rolled and formed, the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank; the water content of the mud cake is 10-40 wt%; the water content of the green body is 20-40 wt%; the vacuum degree is-0.06 KPa-0.1KPa during degassing treatment.
When dry-pressing and forming, the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain mixed powder; granulating and sieving the mixed powder to obtain a dry pressing material; carrying out dry pressing molding on the dry pressing material, and cutting to obtain a blank body; the water content of the mixed powder is 1-5 wt%; the screening mesh number is 100-200 meshes; the pressure of dry pressing is 8-10MPa.
When grouting molding is carried out, the concrete operation process is as follows:
drying the three-dimensional porous ceramic slurry, mixing to obtain mixed pug, granulating to obtain a feed for injection, injection molding, and demolding to obtain a blank; the pressure of injection molding is 30MPa-100MPa.
In the step 3, the drying temperature is 70-100 ℃, the sintering temperature is 600-1000 ℃, and the sintering time is 2-5h.
In step 3, the porosity of the porous ceramic atomizing core is 30-80%.
The invention has the beneficial effects that:
compared with the traditional porous ceramic atomizing core with a single structure, the porous ceramic atomizing core provided by the invention has three holes with different sizes, and the three holes are communicated with each other, so that the oil storage capacity is large, the oil absorption speed is high, and the shape stability is better after oil absorption. The method for preparing the porous ceramic atomizing core is simple and effective, the used raw materials are low in cost, and starch in the raw materials can serve as a pore-forming agent and a binder in the preparation process.
Drawings
FIG. 1 is a scanned view (one) of the three-dimensional pore structure of a porous ceramic atomizing core of the present invention;
FIG. 2 is a scanned view of the three-dimensional pore structure of the porous ceramic atomizing core of the present invention (II);
FIG. 3 is a scanned view (three) of the three-dimensional pore structure of the porous ceramic atomizing core of the present invention;
FIG. 4 is a schematic oil absorption diagram of a porous ceramic atomizing core of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a preparation method of a three-dimensional interconnected porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 30 to 60 percent of framework material, 10 to 40 percent of pore-forming agent and 10 to 30 percent of binder, wherein the sum of the mass fractions of the components is 100 percent
The solid content of the non-Newtonian fluid is 60% -70%; the solvent is water;
the skeleton material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is any one of soluble starch, potato starch, corn starch, pea starch and sweet potato starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is any one of slip casting, roll forming and dry pressing forming;
when the material is rolled and formed, the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank;
the water content of the mud cake is 10-40 wt%; the water content of the green body is 20-40 wt%; during degassing treatment, the vacuum degree is-0.06 KPa-0.1KPa;
when dry pressing forming is carried out, the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain mixed powder; granulating and sieving the mixed powder to obtain a dry pressing material; carrying out dry pressing molding on the dry pressing material, and cutting to obtain a blank body;
the water content of the mixed powder is 1-5 wt%; the screening mesh number is 100-200 meshes; the pressure of dry pressing is 8-10MPa;
when grouting molding is carried out, the concrete operation process is as follows:
drying the three-dimensional porous ceramic slurry, mixing to obtain mixed pug, granulating to obtain a feed for injection, injection molding, and demolding to obtain a blank;
the pressure of injection molding is 30MPa-100MPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 70-100 ℃, the sintering temperature is 600-1000 ℃, and the sintering time is 2-5h;
the porosity of the porous ceramic atomizing core is 30-80%.
Fig. 1-3 are scanning images of the three-dimensional porous ceramic atomizing core prepared by the method of the invention, and it can be seen from the images that the three-dimensional communicating holes which are connected with each other from large to small are formed inside the sample, and fig. 1 shows that the average pore diameter of the big pores is about 100 μm, which is the big pores left after the raw material starch is burnt out. In FIG. 2, it can be seen that numerous mesopores having an average pore diameter of about 25 μm are distributed inside the macropores, which are formed by the loss of the PMMA fine particles as the raw material. Meanwhile, since diatomite, which is one of the raw materials, is calcined and finally remains in the material to form a part of the pore wall, as shown in fig. 3, the diatomite is a porous material and numerous small pores having a pore diameter of about 500nm are distributed over the surface of the diatomite, and thus uniform and fine pores having a pore diameter of about 500nm are formed in the pore wall inside the porous ceramic. Finally, in the whole material, three holes with different sizes generated by three different raw materials are communicated with each other and are distributed on each part in the material in a three-dimensional mode with uniform size, so that a special three-dimensional through hole structure is formed in the porous ceramic.
Example 1
The invention relates to a preparation method of a three-dimensional interconnected porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and performing ball milling in a ball milling tank for 2 hours to obtain three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 58% of framework material, 26% of pore-forming agent and 16% of binder, wherein the sum of the mass fractions of the components is 100%;
the non-newtonian fluid has a solid content of 60% >; the solvent is water;
the skeleton material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is soluble starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is roll forming; the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank;
the water content of the mud cake is 30wt%; the water content of the green body is 25.5wt%; during degassing treatment, the vacuum degree is-0.08 KPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 90 ℃, the sintering temperature is 720 ℃, and the sintering time is 2h; the porosity of the porous ceramic atomizing core is 51 percent.
Example 2
The invention relates to a preparation method of a three-dimensional interconnected porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 53 percent of framework material, 30 percent of pore-forming agent and 17 percent of binder, wherein the sum of the mass fractions of the components is 100 percent
The non-Newtonian fluid has a solids content of 62%; the solvent is water;
the framework material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is corn starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is roll forming, and the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank;
the water content of the mud cake is 30wt%; the water content of the green body is 25.5wt%; during degassing treatment, the vacuum degree is-0.08 KPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 90 ℃, the sintering temperature is 720 ℃, and the sintering time is 2h;
the porosity of the porous ceramic atomizing core is 48%.
Example 3
The invention relates to a preparation method of a three-dimensional interconnected porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 53 percent of framework material, 30 percent of pore-forming agent and 17 percent of binder, wherein the sum of the mass fractions of the components is 100 percent
The non-Newtonian fluid has a solids content of 62%; the solvent is water;
the framework material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the adhesive is potato starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is roll forming, and the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank;
the water content of the mud cake is 30wt%; the water content of the green body is 25.5wt%; during degassing treatment, the vacuum degree is-0.08 KPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 90 ℃, the sintering temperature is 720 ℃, and the sintering time is 2h;
the porosity of the porous ceramic atomizing core is 57%.
Example 4
The invention relates to a preparation method of a three-dimensional communicated porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 30 percent of framework material, 40 percent of pore-forming agent and 30 percent of binder, wherein the sum of the mass fractions of the components is 100 percent
The non-Newtonian fluid has a solids content of 70%; the solvent is water;
the skeleton material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is potato starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is slip casting, and the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry, mixing to obtain mixed pug, granulating to obtain a feed for injection, injection molding, and demolding to obtain a blank;
the pressure of injection molding is 30MPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 100 ℃, the sintering temperature is 600 ℃, and the sintering time is 2 hours;
the porosity of the porous ceramic atomizing core is 60%.
Example 5
The invention relates to a preparation method of a three-dimensional interconnected porous ceramic atomizing core, which is implemented according to the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain a three-dimensional porous ceramic slurry;
the mixture comprises the following components in percentage by mass: 60 percent of framework material, 10 percent of pore-forming agent and 30 percent of binder, wherein the sum of the mass fractions of the components is 100 percent
The non-Newtonian fluid has a solid content of 60%; the solvent is water;
the skeleton material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is sweet potato starch;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
the forming mode is dry pressing forming, and the specific operation process is as follows:
drying the three-dimensional porous ceramic slurry to obtain mixed powder; granulating and sieving the mixed powder to obtain a dry pressing material; carrying out dry pressing molding on the dry pressing material, and cutting to obtain a blank body;
the water content of the mixed powder is 3wt%; the sieve mesh number is 200 meshes; the pressure of dry pressing is 8MPa;
step 3, drying the obtained green body, and then sintering to obtain a three-dimensional porous ceramic atomizing core;
the drying temperature is 70 ℃, the sintering temperature is 900 ℃, and the sintering time is 2h;
the porosity of the porous ceramic atomizing core is 45%.
TABLE 1 results of Performance testing of three-dimensional porous ceramic atomizing cores of examples 1-5
Table 1 shows the results of the performance tests of the three-dimensional porous ceramic atomizing cores of examples 1 to 5 of the present invention, and it can be seen that the larger the pore-forming agent usage ratio is, the higher the apparent porosity, the oil absorption and the water absorption are, and the lower the bending strength is. The use of different types of starch binders, varying the calcination temperature, and varying the calcination time all affect a range of properties of the sample.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements and the like, which are within the principle and scope of the present invention, are included in the scope of the present invention.
Claims (9)
1. The preparation method of the three-dimensional interconnected porous ceramic atomizing core is characterized by comprising the following steps:
step 1, mixing a framework material, a pore-forming agent and a binder to obtain a mixture, then adding a solvent to form a non-Newtonian fluid, and uniformly mixing to obtain three-dimensional porous ceramic slurry;
step 2, forming the three-dimensional porous ceramic slurry obtained in the step 1 into a ceramic blank;
and 3, drying the obtained blank, and then sintering to obtain the three-dimensional porous ceramic atomizing core.
2. The preparation method of the three-dimensional interconnected porous ceramic atomizing core according to claim 1, characterized in that in the step 1, the mixture comprises the following components in percentage by mass: 30-60% of framework material, 10-40% of pore-forming agent and 10-30% of binder, wherein the sum of the mass fractions of the components is 100%; the solid content of the non-Newtonian fluid is 60-70%; the solvent is water.
3. The method for preparing the three-dimensional interconnected porous ceramic atomizing core according to the claim 2, characterized in that in the step 1, the framework material is formed by mixing glass powder and diatomite; the pore-forming agent is polymethyl methacrylate; the binder is any one of soluble starch, potato starch, corn starch, pea starch and sweet potato starch.
4. The method for preparing the three-dimensional interconnected porous ceramic atomizing core according to claim 1, wherein in the step 2, the forming mode is any one of slip casting, roll forming and dry pressing.
5. The method for preparing the three-dimensional interconnected porous ceramic atomizing core according to claim 4, wherein the specific operation process during roll forming is as follows:
drying the three-dimensional porous ceramic slurry to obtain a mud cake; degassing the mud cakes, and then extruding to obtain mud materials; rolling out the pug for molding, and cutting to obtain a blank; the water content of the mud cake is 10-40 wt%; the water content of the green body is 20-40 wt%; the vacuum degree is-0.06 KPa-0.1KPa during degassing treatment.
6. The preparation method of the three-dimensional interconnected porous ceramic atomizing core according to claim 4, characterized in that the specific operation process during dry pressing is as follows:
drying the three-dimensional porous ceramic slurry to obtain mixed powder; granulating and sieving the mixed powder to obtain a dry pressing material; carrying out dry pressing molding on the dry pressing material, and cutting to obtain a blank body; the water content of the mixed powder is 1-5 wt%; the number of the screened meshes is 100-200 meshes; the pressure of dry pressing is 8-10MPa.
7. The preparation method of the three-dimensional interconnected porous ceramic atomizing core according to claim 4, characterized in that the concrete operation process during the slip casting is as follows:
drying the three-dimensional porous ceramic slurry, mixing to obtain a mixed pug, granulating to obtain a feed for injection, injection molding, and demolding to obtain a blank; the pressure of injection molding is 30MPa-100MPa.
8. The method for preparing the three-dimensional interconnected porous ceramic atomizing core according to claim 1, wherein in the step 3, the drying temperature is 70-100 ℃, the sintering temperature is 600-1000 ℃, and the sintering time is 2-5h.
9. The method for preparing the three-dimensional interconnected porous ceramic atomizing core according to claim 1, wherein in the step 3, the porosity of the porous ceramic atomizing core is 30-80%.
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| CN105218137A (en) * | 2015-09-29 | 2016-01-06 | 潮州三环（集团）股份有限公司 | A kind of ceramic size, ceramic porous Oil Guide body and electronic cigarette heat generating component |
| CN111205104A (en) * | 2020-01-14 | 2020-05-29 | 东莞市陶陶新材料科技有限公司 | Porous ceramic for electronic cigarette and preparation method thereof |
| CN114213020A (en) * | 2021-12-31 | 2022-03-22 | 深圳市吉迩科技有限公司 | Porous ceramic slurry, preparation method of porous ceramic and porous ceramic |
| CN114634372A (en) * | 2022-03-25 | 2022-06-17 | 山东国瓷功能材料股份有限公司 | Porous ceramic material for atomizing core, porous ceramic body, ceramic atomizing core, preparation method and electronic cigarette |
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