Porous ceramic atomizing core and preparation method thereof
By using specific raw materials and processes to prepare porous ceramic atomization cores, the problems of low strength, low porosity and uneven pore size are solved, high strength, high porosity and adaptability are achieved, and costs and development cycles are reduced.
Patent Information
- Application Number
- CN202510734355.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2025-09-16
AI Technical Summary
Existing porous ceramic atomization cores have problems such as low strength, low porosity, uneven pore size distribution, and inability to adapt to different atomization liquids, resulting in long development cycles and high costs.
Low-temperature glass powder, silicon oxide, aluminum oxide, silicon carbide, copper chromium black and pore-forming agent are used as raw materials. The porous ceramic atomization core is prepared through mixing, waxing, slip injection molding and sintering processes. The etched mesh heating wire is used as the heating component, and the ingredient ratio is adjusted to control the heating temperature field.
The prepared porous ceramic atomization core has high strength, high porosity, and uniform pore size, and can adapt to different atomization liquids, shortening the development cycle and reducing costs.
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Figure CN120647419A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of porous ceramic technology, and more specifically, to a porous ceramic atomizing core and a preparation method thereof. Background Art
[0002] As the heating element of an e-cigarette, the atomizer is a key component. Its principle is to generate heat through battery power, causing the stored e-liquid to volatilize and produce a certain amount of smoke. With technological advancements, porous ceramics are now the primary carriers used to absorb e-liquid in atomizers. These materials not only possess strong adsorption capacity but also offer advantages such as being non-toxic, safe, reliable, non-flammable, and stable. Therefore, porous ceramics are a preferred material for e-liquid absorption.
[0003] The porosity, pore size, and distribution of porous ceramics play a crucial role in atomization and the desired flavor. However, current porous ceramic atomizer cores suffer from low strength, low porosity, and uneven pore size distribution. Furthermore, current porous ceramics are difficult to adjust for both ingredient ratios and temperature, making them incompatible with different atomizer liquids. This necessitates the preparation of different porous ceramic atomizer cores and heating grids, leading to long development cycles and high costs. Summary of the Invention
[0004] The purpose of this application is to provide a porous ceramic atomizer core and a preparation method thereof to solve the technical problems of low strength, low porosity, uneven pore size distribution and inability to adapt to different atomizing liquids of the existing porous ceramic atomizer core.
[0005] In order to solve the above technical problems, the present invention provides a method for preparing a porous ceramic atomizer core, which adopts the following technical solution:
[0006] Weigh low-temperature glass powder, silicon oxide, aluminum oxide, silicon carbide, copper chromium black and a pore-forming agent according to the formula, put them into a mixer and mix them evenly to obtain ceramic powder;
[0007] According to the formula, paraffin wax, beeswax, polyethylene and stearic acid are weighed and put into a wax mixing machine, and the wax is mixed until it is completely melted to obtain a binder liquid;
[0008] Adding the ceramic powder to the binder liquid for a predetermined number of times and stirring evenly to obtain a ceramic slurry;
[0009] Put the ceramic slurry into a slip casting machine, put the etched mesh heating wire into a mold, inject the ceramic slurry into the mold through the slip casting machine, and obtain a ceramic green body after molding;
[0010] The ceramic green body is placed in a sintering furnace and sintered according to a preset sintering process to obtain a porous ceramic atomizing core.
[0011] In order to solve the above technical problems, an embodiment of the present application further provides a porous ceramic atomization core, which is prepared by the preparation method described above.
[0012] Compared with the prior art, this application has the following beneficial effects:
[0013] The preparation method of the porous ceramic atomization core provided in the present application uses silicon oxide, aluminum oxide, silicon carbide, copper chromium black, etc. as raw materials to prepare the porous ceramic atomization core with low sintering temperature, small shrinkage, high strength, high porosity, and uniform pore size; secondly, the slip injection molding process is adopted to mix the ceramic powder with paraffin, beeswax, polyethylene, and stearic acid to have high strength and plasticity, and the strength and size of the ceramic blank can be guaranteed during the slip injection molding process; in addition, the etched mesh heating wire is used as the heating component, and the temperature of the heating field is controlled by adjusting the component ratio, so that the porous ceramic atomization core can adapt to different atomization liquids, improve the atomization effect, shorten the development cycle, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the solutions in this application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0015] Figure 1 This is a flow chart of an embodiment of a method for preparing a porous ceramic atomizing core according to the present application;
[0016] Figure 2 This is a schematic diagram of the heating temperature field of the first embodiment of the porous ceramic atomizer core of the present application;
[0017] Figure 3 This is a schematic diagram of the heating temperature field of the second embodiment of the porous ceramic atomizer core of the present application;
[0018] Figure 4 This is a schematic diagram of the heating temperature field of the third embodiment of the porous ceramic atomization core of the present application. DETAILED DESCRIPTION
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the 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-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.
[0020] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.
[0022] The present invention provides a method for preparing a porous ceramic atomizing core. Figure 1 As shown, the preparation method comprises the following steps:
[0023] Step S10: weigh low-temperature glass powder, silicon oxide, aluminum oxide, silicon carbide, copper chromium black and a pore-forming agent according to a formula, put them into a mixer and mix them evenly to obtain ceramic powder.
[0024] Low-temperature glass powder can lower the sintering temperature and enhance the bonding between the component particles, facilitating sintering and forming. Specifically, it melts into a liquid phase at the high temperatures of the sintering process, bonding the powders together and imparting strength to the resulting atomizer core. Silicon oxide is a porous material. During the sintering process, the arrangement of particles, sintering, and the formation of pores create the basic skeleton structure of the porous ceramic, a key component in the atomizer core's oil storage. This porous structure allows the e-liquid to penetrate evenly into the atomizer core, enhancing atomization. Alumina, as the primary matrix material, provides high mechanical strength and hardness to the porous ceramic, facilitating the formation and stability of the porous structure. Silicon carbide, as an aggregate in the porous ceramic, significantly enhances the ceramic's high-temperature strength and wear resistance. This ensures the structural and performance stability of the porous ceramic during high-temperature use, preventing significant deformation or performance degradation due to temperature fluctuations, thereby ensuring the reliability and service life of the atomizer core in high-temperature environments. The addition of copper chromium black can also lower the sintering temperature and, to a certain extent, improve the ceramic's hardness and strength. The pore-forming agent can volatilize at high temperature to form holes, thereby increasing the porosity of the atomizer core.
[0025] In some embodiments, weighed low-temperature glass powder, silicon oxide, aluminum oxide, silicon carbide, copper chromium black and pore-forming agent are placed in a mixer and mixed for 2-3 hours. After mixing evenly, the mixture is dried to obtain ceramic powder for later use.
[0026] In some embodiments, the formula is calculated according to mass percentage. In the ceramic powder, the mass percentage of low-temperature glass powder is 10% to 20%, the mass percentage of silicon oxide is 10% to 55%, the mass percentage of aluminum oxide is 10% to 60%, the mass percentage of silicon carbide is 3% to 15%, the mass percentage of copper chrome black is 0.3% to 1%, and the mass percentage of the pore-forming agent is 10% to 25%.
[0027] Specifically, the mass percentage of the low-temperature glass powder can be any one of 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% and 20%, or a range formed by any two numbers; the mass percentage of silicon oxide can be any one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% and 55%, or a range formed by any two numbers; the mass percentage of aluminum oxide can be any one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55% and 60%, or a range formed by any two numbers; the mass percentage of silicon carbide can be any one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55% and 60%, or a range formed by any two numbers; The percentage can be any one of 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% and 15%, or a range formed by any two numbers; the mass percentage of copper chrome black can be any one of 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% and 1%, or a range formed by any two numbers; the mass percentage of the pore former can be any one of 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% and 25%, or a range formed by any two numbers.
[0028] In some embodiments, the average particle size of silicon oxide is 44-50 μm, the average particle size of aluminum oxide is 27-33 μm, the average particle size of silicon carbide is 16-22 μm, and the average particle size of the pore former is 50-70 μm.
[0029] The average particle size of silicon oxide can be any one of 44 μm, 45 μm, 46 μm, 47 μm, 48 μm, 49 μm and 50 μm or a range formed by any two numbers; the average particle size of aluminum oxide can be any one of 27 μm, 28 μm, 29 μm, 30 μm, 31 μm, 32 μm and 33 μm or a range formed by any two numbers; the average particle size of silicon carbide can be 16 μm, 17 μm, The average particle size of the pore-forming agent can be any value among 18μm, 19μm, 20μm, 21μm and 22μm, or a range formed by any two numbers; the average particle size of the pore-forming agent can be any value among 50μm, 51μm, 53μm, 55μm, 56μm, 58μm, 60μm, 61μm, 62μm, 64μm, 65μm, 66μm, 67μm, 68μm, 69μm and 70μm, or a range formed by any two numbers.
[0030] In some embodiments, the pore-forming agent is at least one of PS microspheres (polystyrene microspheres) and PMMA (polymethyl methacrylate). Specifically, the pore-forming agent can be PS microspheres; or, the pore-forming agent can be PMMA; or, the pore-forming agent can be PS microspheres and PMMA.
[0031] Among them, PS microspheres are tiny spherical particles made of polystyrene polymer materials. They have highly uniform particle size and a small coefficient of variation. They can ensure uniform dispersion in ceramics, form a uniform pore distribution, and precisely control the size of the pores formed.
[0032] Step S20: paraffin wax, beeswax, polyethylene and stearic acid are weighed according to the formula and put into a wax mixing machine, and the wax is mixed until it is completely melted to obtain a binder liquid.
[0033] According to the formula ratio of ceramic slurry, paraffin wax, beeswax, polyethylene and stearic acid are weighed and put into the wax mixing machine. The wax mixing machine is set to a suitable temperature and speed. Stir for half an hour to completely melt the paraffin wax, beeswax, polyethylene and stearic acid to obtain a binder liquid. The binder liquid is in a clear liquid state.
[0034] In some embodiments, the components in the ceramic slurry are calculated by weight: the weight percentage of paraffin is 12%-18%, the weight percentage of beeswax is 2%-5%, the weight percentage of polyethylene is 1%-3%, and the weight percentage of stearic acid is 1%-3%.
[0035] Among them, the mass percentage of paraffin can be any one of 12%, 13%, 14%, 15%, 16%, 17% and 18%, or a range formed by any two numbers; the mass percentage of beeswax can be any one of 2%, 2.5%, 3%, 3.5%, 4%, 4.5% and 5%, or a range formed by any two numbers; the mass percentage of polyethylene can be any one of 1%, 1.5%, 2%, 2.5% and 3%, or a range formed by any two numbers; the mass percentage of stearic acid can be any one of 1%, 1.5%, 2%, 2.5% and 3%, or a range formed by any two numbers.
[0036] In some embodiments, the temperature of the wax mixing machine is 140-160° C., and the speed of the wax mixing machine is 30-50 r / min.
[0037] The temperature of the waxing machine can be any value or a range formed by any two numbers among 140℃, 141℃, 142℃, 143℃, 144℃, 145℃, 146℃, 147℃, 148℃, 149℃, 150℃, 151℃, 152℃, 153℃, 154℃, 155℃, 156℃, 157℃, 158℃, 159℃ and 160℃; the speed of the waxing machine can be 30r / min, 31r / min, 32r / min The range formed by any two of n, 33r / min, 34r / min, 35r / min, 35r / min, 36r / min, 37r / min, 38r / min, 39r / min, 40r / min, 41r / min, 42r / min, 43r / min, 44r / min, 45r / min, 46, 47r / min, 48r / min, 49r / min and 50r / min.
[0038] Step S30 , adding ceramic powder into the binder liquid for a preset number of times and stirring evenly to obtain ceramic slurry.
[0039] Add the binder liquid into the internal mixer, then add the ceramic powder into the binder liquid for a preset number of times, and stir for 3-5 hours until uniform to obtain ceramic slurry.
[0040] In the ceramic slurry, the mass percentage of ceramic powder is 78%-85%. Specifically, the mass percentage of ceramic powder can be any value among 78%, 79%, 80%, 81%, 82%, 83%, 84% and 85%, or a range formed by any two numbers.
[0041] In some embodiments, the preset number of times is 2 to 4 times. Specifically, the preset number of times can be 2 times, 3 times, or 4 times.
[0042] Step S40: putting ceramic slurry into a slip-casting machine, putting the etched mesh heating wire into a mold, injecting the ceramic slurry into the mold through the slip-casting machine, and obtaining a ceramic green body after molding.
[0043] The etched mesh heating wire is a flat mesh structure composed of densely and evenly distributed small mesh holes and mesh walls connecting them, with a larger effective heating area; the mesh structure of the etched mesh heating wire makes the heat evenly distributed on the entire plane, with more uniform heating and atomization, faster heating speed and efficient oil conduction performance, significantly improving the atomization efficiency and instantaneous explosive power, ensuring that the e-liquid is evenly and fully atomized, making the taste full and pure.
[0044] The ceramic slurry is placed in the barrel of the slip casting machine, the etched mesh heating wire is placed in the mold, and then the slip casting machine injects the ceramic slurry into the mold. After the slip casting molding process, a ceramic body with a regular shape and a heating wire is obtained.
[0045] In some embodiments, the grouting temperature of the grouting machine is 80-90°C, and the grouting pressure is 0.4-0.6 MPa. The grouting temperature can be any value or a range formed by any two numbers selected from 80°C, 81°C, 82°C, 83°C, 84°C, 85°C, 86°C, 87°C, 88°C, 89°C, and 90°C; and the grouting pressure can be any value or a range formed by any two numbers selected from 0.4 MPa, 0.5 MPa, and 0.6 MPa.
[0046] Step S50: placing the ceramic body into a sintering furnace and sintering it according to a preset sintering process to obtain a porous ceramic atomizing core.
[0047] The ceramic body is placed in a sintering furnace and sintered according to a preset sintering process, wherein the preset sintering process is as follows: 1) First stage: heating to 80°C at 20-30°C / h and holding at this temperature for 1 hour; 2) Second stage: heating to 150°C at 10-20°C / h and holding at this temperature for 1-3 hours; 3) Third stage: heating to 300°C at 15-25°C / h and holding at this temperature for 5-7 hours; 4) Fourth stage: heating to 380°C at 35-45°C / h and holding at this temperature for 1-2 hours; 5) Fifth stage: heating to 450°C at 20-30°C / h and holding at this temperature for 2-4 hours; 6) Sixth stage: heating to 500-540°C at 15-25°C / h and holding at this temperature for 2-4 hours; 7) Seventh stage: cooling to room temperature. The prepared porous ceramic atomizer core is thus obtained.
[0048] The preparation method of the porous ceramic atomizer core of the present application has a simple process flow. Through the ratio of ingredients, the sintering temperature is reduced, energy consumption is reduced, costs are reduced, and the production efficiency is significantly improved. The slip injection molding process adopted can ensure the strength and size of the ceramic body. There are clear requirements for the control of the heating rate and the insulation time of each stage during the sintering process, which is very critical for the volatilization and discharge of organic matter during the heating process. Finally, a porous ceramic atomizer core with a small shrinkage rate is obtained, which ensures that the pore size distribution of the porous ceramic atomizer core is uniform, and improves the yield rate.
[0049] The present application also provides a porous ceramic atomization core, which is prepared using the preparation method described above.
[0050] The average temperature of the heating field of the porous ceramic atomizing core of the present application is 170-350° C., and the shrinkage rate is less than 1%.
[0051] The heating temperature of the porous ceramic atomizer core can be adjusted between 170-350°C, making it suitable for different atomizer liquids. The shrinkage rate is less than 1%, which can accurately control the size of the porous ceramic and improve its dimensional stability.
[0052] The following is a more detailed description of the present application with reference to specific embodiments, and further elaboration of the present application. However, these embodiments are by no means intended to limit the present application.
[0053] Example 1
[0054] This embodiment provides a method for preparing a porous ceramic atomizing core, comprising the following steps:
[0055] Step 1: Weigh, by mass percentage, 15% low-temperature glass powder, 50% aluminum oxide, 10% silicon oxide, 5.5% silicon carbide, 0.5% copper chrome black, and 19% polystyrene microspheres. Place the weighed powders in a three-dimensional mixer, stir for 2 hours, and dry to obtain a ceramic powder for later use.
[0056] Step 2: Weigh 84% ceramic powder and 16% binder, calculated by mass percentage. The binder consists of 12% paraffin wax, 2% beeswax, 1% polyethylene, and 1% stearic acid. Place the weighed binder into a wax mixer at 150°C. Once the binder is completely melted, a liquid binder is obtained.
[0057] Step 3: Add 84% of the ceramic powder into the binder liquid in three times and stir for 5 hours to obtain a ceramic slurry.
[0058] Step 4: Add ceramic slurry into the grouting machine, put the etched mesh heating wire into the mold, and obtain a regularly shaped ceramic body with a heating wire through grouting molding. The grouting temperature of the grouting machine is 80°C and the grouting pressure is 0.5MPa.
[0059] Step 5: Place the ceramic body into a sintering furnace, heat it to 80°C at 25°C / h, and keep it warm for 1 hour; heat it to 150°C at 15°C / h, and keep it warm for 2 hours; heat it to 300°C at 20°C / h, and keep it warm for 5 hours; heat it to 380°C at 40°C / h, and keep it warm for 2 hours; heat it to 450°C at 25°C / h, and keep it warm for 2 hours; heat it to 540°C at 20°C / h, and keep it warm for 3 hours. Cool it to room temperature to obtain the prepared porous ceramic atomization core.
[0060] Step 6: Use a porosity tester to test the porosity of the ceramic, use an electronic universal testing machine to test the bending strength of the ceramic, use an aperture analyzer to test the pore size of the ceramic, and use an infrared thermometer to test the heating temperature field of the atomizer core at a power of 4W. Figure 2 shown.
[0061] Example 2
[0062] This embodiment provides a method for preparing a porous ceramic atomizing core, comprising the following steps:
[0063] Step 1: Weigh, by mass percentage, 16% low-temperature glass powder, 30% aluminum oxide, 25% silicon oxide, 8.2% silicon carbide, 0.8% copper chrome black, and 20% polystyrene microspheres. Place the weighed powders in a three-dimensional mixer, stir for 2 hours, and dry to obtain a ceramic powder for later use.
[0064] Step 2: Weigh 82% ceramic powder and 18% binder, calculated by mass percentage. The binder consists of 12% paraffin wax, 3% beeswax, 2% polyethylene, and 1% stearic acid. Place the weighed binder into a wax mixer at 150°C. Once the binder is completely melted, a liquid binder is obtained.
[0065] Step 3: Add 82% of the ceramic powder into the binder liquid in three times and stir for 5 hours to obtain a ceramic slurry.
[0066] Step 4: Add ceramic slurry into the grouting machine, put the etched mesh heating wire into the mold, and obtain a regularly shaped ceramic body with a heating wire through grouting molding. The grouting temperature of the grouting machine is 80°C and the grouting pressure is 0.5MPa.
[0067] Step five, placing the ceramic body into a sintering furnace, heating it to 80°C at 20°C / h, keeping it warm for 1 hour, heating it to 150°C at 15°C / h, keeping it warm for 2 hours, heating it to 300°C at 20°C / h, keeping it warm for 5 hours, heating it to 380°C at 35°C / h, keeping it warm for 2 hours, heating it to 450°C at 25°C / h, keeping it warm for 2 hours, heating it to 540°C at 15°C / h, keeping it warm for 2 hours, and cooling it to room temperature to obtain the prepared porous ceramic atomization core.
[0068] Step 6: Use a porosity tester to test the porosity of the ceramic, use an electronic universal testing machine to test the bending strength of the ceramic, use an aperture analyzer to test the pore size of the ceramic, and use an infrared thermometer to test the heating temperature field of the atomizer core at a power of 4W. Figure 3 shown.
[0069] Example 3
[0070] This embodiment provides a method for preparing a porous ceramic atomizing core, comprising the following steps:
[0071] Step 1: Weigh, by mass percentage, 15% low-temperature glass powder, 15% aluminum oxide, 40% silicon oxide, 6% silicon carbide, 1% copper chrome black, and 23% polystyrene microspheres. Place the weighed powders in a three-dimensional mixer, stir for 2 hours, and dry to obtain a ceramic powder for later use.
[0072] Step 2: Weigh 80% ceramic powder and 20% binder, calculated by mass percentage. The binder consists of 15% paraffin wax, 3% beeswax, 1% polyethylene, and 1% stearic acid. Place the weighed binder into a wax mixer at 150°C. Once the binder is completely melted, a liquid binder is obtained.
[0073] Step 3: Add 80% of the ceramic powder into the binder liquid in three times and stir for 5 hours to obtain a ceramic slurry.
[0074] Step 4: Add ceramic slurry into the grouting machine, put the etched mesh heating wire into the mold, and obtain a regularly shaped ceramic body with a heating wire through grouting molding. The grouting temperature of the grouting machine is 80°C and the grouting pressure is 0.5MPa.
[0075] Step five, placing the ceramic body into a sintering furnace, heating it to 80°C at 21°C / h, keeping it warm for 1 hour, heating it to 150°C at 12°C / h, keeping it warm for 2 hours, heating it to 300°C at 18°C / h, keeping it warm for 5 hours, heating it to 380°C at 36°C / h, keeping it warm for 2 hours, heating it to 450°C at 22°C / h, keeping it warm for 2 hours, heating it to 540°C at 20°C / h, keeping it warm for 2 hours, and cooling it to room temperature to obtain the prepared porous ceramic atomization core.
[0076] Step 6: Use a porosity tester to test the porosity of the ceramic, use an electronic universal testing machine to test the bending strength of the ceramic, use an aperture analyzer to test the pore size of the ceramic, and use an infrared thermometer to test the heating temperature field of the atomizer core at a power of 4W. Figure 4 shown.
[0077] Test result analysis:
[0078] The porous ceramic atomizing cores of Examples 1-3 and Comparative Example 1 were tested and analyzed, and the test results are shown in Table 1.
[0079] Table 1 Test results
[0080] Porous ceramic atomizer core Porosity% Pore size μm Strength MPa Shrinkage Example 1 48 19.3 8.7 0.2％ Example 2 51 21.5 9.5 0.5％ Example 3 52 23.5 8.9 0.4％
[0081] It can be seen from the results in the above table that the porous ceramic atomizer core prepared by the preparation method of the present application has a small shrinkage rate, high strength, high porosity and uniform pore size.
[0082] See also Figures 2 to 4, the temperature of the heating temperature field of the porous ceramic atomizer core of Example 1 is between 126.3℃ and 217.5℃, with an average temperature of 173.6℃; the temperature of the heating temperature field of the porous ceramic atomizer core of Example 2 is between 140.0℃ and 257.8℃, with an average temperature of 213.9℃; the temperature of the heating temperature field of the porous ceramic atomizer core of Example 3 is between 168.5℃ and 309.8℃, with an average temperature of 256.9℃. It can be seen that the heating temperature field of the porous ceramic atomizer core prepared by the preparation method of the present application is adjustable, so that the porous ceramic atomizer core is adapted to different atomizing liquids and has a good atomization effect.
[0083] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.
Claims
1. A method for preparing a porous ceramic atomizing core, characterized in that: The following steps are involved: Weigh low-temperature glass powder, silicon oxide, aluminum oxide, silicon carbide, copper chromium black and a pore-forming agent according to the formula, put them into a mixer and mix them evenly to obtain ceramic powder; According to the formula, paraffin wax, beeswax, polyethylene and stearic acid are weighed and put into a wax mixing machine, and the wax is mixed until it is completely melted to obtain a binder liquid; Adding the ceramic powder to the binder liquid for a predetermined number of times and stirring evenly to obtain a ceramic slurry; Put the ceramic slurry into a slip casting machine, put the etched mesh heating wire into a mold, inject the ceramic slurry into the mold through the slip casting machine, and obtain a ceramic green body after molding; The ceramic green body is placed in a sintering furnace and sintered according to a preset sintering process to obtain a porous ceramic atomizing core.
2. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The formula is calculated based on mass percentage: the low-temperature glass powder is 10% to 20%, the silicon oxide is 10% to 55%, the aluminum oxide is 10% to 60%, the silicon carbide is 3% to 15%, the copper chrome black is 0.3% to 1%, and the pore-forming agent is 10% to 25%.
3. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The average particle size of the silicon oxide is 44-50 μm, the average particle size of the aluminum oxide is 27-33 μm, the average particle size of the silicon carbide is 16-22 μm, and the average particle size of the pore former is 50-70 μm.
4. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The pore-forming agent is at least one of PS microspheres and PMMA.
5. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The components in the ceramic slurry are calculated based on mass percentage: the paraffin accounts for 12%-18%, the beeswax accounts for 2%-5%, the polyethylene accounts for 1%-3%, the stearic acid accounts for 1%-3%, and the ceramic powder accounts for 78%-85%.
6. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The temperature of the wax mixing machine is 140-160° C., the speed of the wax mixing machine is 30-50 r / min, and the preset number of times is 2 to 4 times.
7. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The grouting temperature of the grouting machine is 80-90° C., and the grouting pressure is 0.4-0.6 MPa.
8. The method for preparing a porous ceramic atomizing core according to claim 1, characterized in that: The preset sintering process is as follows: Stage 1: Heat to 80°C at 20-30°C / h and keep warm for 1 hour; The second stage: heating to 150℃ at 10-20℃ / h and keeping warm for 1-3h; The third stage: heating to 300℃ at 15-25℃ / h and keeping warm for 5-7h; The fourth stage: heating to 380℃ at 35-45℃ / h and keeping warm for 1-2h; The fifth stage: heating to 450℃ at 20-30℃ / h and keeping warm for 2-4h; Stage 6: Heat up to 500-540℃ at 15-25℃ / h and keep warm for 2-4h; Stage 7: Cooling to room temperature.
9. A porous ceramic atomizing core, characterized in that: The porous ceramic atomizing core is prepared by the preparation method according to any one of claims 1 to 8.
10. The porous ceramic atomizing core according to claim 9, characterized in that: The average temperature of the heating field of the porous ceramic atomization core is 170-350° C.; and the shrinkage rate of the porous ceramic atomization core is less than 1%.