Preparation method of porous ceramic atomizing core with preheating function

Abstract

The invention discloses a preparation method of a porous ceramic atomizing core with a preheating function, which comprises the following steps: S1, preparing a heating wire structure: preparing a spiral metal heating wire from an alloy heating wire, and then respectively connecting a first lead and a second lead at two ends of the spiral metal heating wire to form the heating wire structure; s2, porous heating ceramic preparation: taking porous heating ceramic ingredients, synthesizing, crushing after synthesis, performing ball milling on the secondary ingredients, stirring and heating to form slurry, putting the slurry into a hot die casting machine, stirring, extruding the slurry into a mold to form a hollow cylindrical ceramic blank, and drying to obtain the porous heating ceramic. Then, the ceramic blank is sequentially subjected to powder burying, dewaxing and sintering, and then the porous heating ceramic is prepared; s3, preparing porous insulating ceramic; and S4, preparing the porous ceramic atomizing core with the preheating function. The prepared porous ceramic atomizing core with the preheating function has the advantages that the power consumption can be reduced, the atomizing amount can be increased, and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of porous ceramic atomizing core preparation, and in particular relates to a method for preparing a porous ceramic atomizing core with a preheating function. Background Art

[0002] As the core component of the electronic atomization device, the porous ceramic atomization core plays a very important role in the entire atomization device, especially in terms of product reliability. For example, factors such as leakage, burnt smell, and user experience have a great impact on the entire atomization device. The existing preparation process of porous ceramic atomization cores is mainly through the pore-forming agent method, which adds volatile or combustible pore-forming agents to the ceramic ingredients, and uses these pore-forming agents to evaporate or burn out at high temperatures to leave pores in the ceramic body. Commonly used pore-forming agents include: organic resin microbeads, organic fibers, carbon fibers, carbon powder, starch, sawdust, polymethyl methacrylate, methyl cellulose, etc. The above various organic and inorganic raw materials are mixed and added to the melted paraffin and stirred evenly to form a viscous slurry. A metal heating wire or metal etching sheet is pre-placed in the molding mold and is formed into a ceramic body with a metal heating wire or metal etching sheet through hot pressing and injection molding. After high-temperature wax removal and sintering, it is made Porous ceramic atomizer core. The atomizer core prepared by the above method is mainly a porous ceramic atomizer core containing quartz sand and diatomaceous earth. The ceramic part of the atomizer core prepared by this method is a unified whole, and there is no difference in the performance of each part. The metal heating wire or metal etching sheet generates heat after passing current. This heat is transferred to the atomized liquid on the surface of the porous ceramic to atomize it into a gaseous state. At the same time, part of the heat is transferred to the inside and back of the porous ceramic, causing the ceramic inside and back to have a certain temperature increase, but the degree of this temperature increase is limited (usually around 100°C). At the same time, since it is not deliberately designed, the heat is uncontrollable, and the preheating effect on the atomized liquid is very limited. In view of the uncontrollable factors existing in the above existing atomizer cores, it is necessary to design a method for preparing a porous ceramic atomizer core with a preheating function to prepare a porous ceramic atomizer core with a preheating function to reduce power consumption and increase the atomization amount. Summary of the Invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a method for preparing a porous ceramic atomizer core with a preheating function, which can reduce power consumption and increase atomization volume.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for preparing a porous ceramic atomizing core with a preheating function comprises the following steps:

[0006] S1. Preparation of heating wire structure: A spiral metal heating wire is made from the alloy heating wire, and a first lead and a second lead are connected to both ends of the spiral metal heating wire to form a heating wire structure;

[0007] S2. Preparation of porous heating ceramics: The porous heating ceramic ingredients are synthesized, crushed, and then the secondary ingredients are ball-milled. The slurry is then stirred and heated to form a slurry. The slurry is then placed in a hot die-casting machine for stirring. The slurry is then squeezed into a mold to form a hollow cylindrical ceramic body. The ceramic body is then powder-embedded, wax-removed, and sintered to form the porous heating ceramic.

[0008] S3. Preparation of porous insulating ceramics: The porous insulating ceramic ingredients are placed in a ball mill. After ball milling, the ingredients are mixed again and sent to a mixer for heating and stirring to form a slurry. The slurry is then placed in a hot die casting machine for stirring and then extruded into a mold to obtain the porous insulating ceramics.

[0009] S4. Preparation of a porous ceramic atomizer core with a preheating function: while the slurry in S3 is extruded into the mold, a prepared heating wire structure and porous heating ceramic are preset in the mold. The slurry, heating wire structure and porous heating ceramic in the mold are bonded into a ceramic embryo, which is then buried with powder, wax removed, and sintered in sequence to form a porous ceramic atomizer core with a preheating function, wherein the first lead and the second lead of the heating wire structure are respectively connected to the electrodes at both ends of the porous heating ceramic.

[0010] Preferably, in S1, a nickel-chromium alloy heating wire with a wire diameter of 0.16 mm is taken and installed on a wire winding machine, and then the nickel-chromium alloy heating wire is processed by the wire winding machine to form a spiral metal heating wire 3 with a resistance of 1.3Ω, and then the first lead and the second lead are taken and the first lead and the second lead are welded to the two ends of the spiral metal heating wire to form a heating wire structure.

[0011] Preferably, 500g of barium titanate powder is taken from S2 and 0.8g of niobium pentoxide is added and mixed evenly, and then the above powder is synthesized in a box-type sintering furnace at 1200°C for 2h, and the synthesized material block is crushed into a powder passing through a 300-mesh sieve by a ball mill, and then aluminum oxide, silicon dioxide, and lithium carbonate are added to the powder crushed by the ball mill, wherein the total amount of aluminum oxide, silicon dioxide and lithium carbonate is 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide and lithium carbonate is aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1, and then corn starch accounting for 20% of the total weight of the powder is added, and The mixture was put into the ball mill jar of a 2L ball mill, the ball mill speed was set to 70 rpm, and the ball milling time was 8 hours. No. 58 paraffin wax was added at a total weight of 25% to the powder after ball milling. The mixture of the ball-milled powder and No. 58 paraffin wax was heated to 70°C in a blender and stirred for 4 hours to allow the ceramic powder and paraffin wax to completely fuse to form a slurry. The slurry was then placed in a hot die casting machine and stirred for 1 hour. The slurry was then pushed by the compressed air pressure of the hot die casting machine and squeezed into a mold to form a hollow cylindrical ceramic body. The ceramic body was then placed in a box-type sintering furnace and made into porous heating ceramics through powder burying, wax removal, and sintering.

[0012] Preferably, 500 g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is taken from S3, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then 20% of corn starch by weight of the mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is added, and then the mixture is placed in a ball mill jar of a ball mill. After the ball milling is completed, 25% of No. 58 paraffin and 2% of stearic acid by weight of the mixture of quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch are added, and then these compounds are sent into a mixer, heated and stirred to form a slurry, and then the slurry is placed in a hot die casting machine for stirring, and then the slurry is squeezed into a mold.

[0013] The present invention also discloses a method for preparing a porous ceramic atomizing core with a preheating function, comprising the following steps:

[0014] S1. Preparation of metal etching mesh: Take the alloy heating element and etch it through a metal etching device to prepare a metal etching mesh;

[0015] S2. Preparation of porous heating ceramics: The porous heating ceramic ingredients are synthesized, crushed after synthesis, and then subjected to ball milling. The secondary ingredients are then stirred and heated to form a slurry. The slurry is then placed in a hot die casting machine and stirred. The slurry is then extruded into a mold to form a rectangular ceramic body. The ceramic body is then sequentially powdered, wax removed, and sintered to form the porous heating ceramic, wherein the porous heating ceramic has a first connecting portion and a second connecting portion at each end.

[0016] S3. Preparation of porous insulating ceramics: The porous insulating ceramic ingredients are placed in a ball mill. After ball milling, the ingredients are mixed again and sent to a mixer for heating and stirring to form a slurry. The slurry is then placed in a hot die casting machine for stirring and then extruded into a mold to obtain the porous insulating ceramics.

[0017] S4. Preparation of a porous ceramic atomizer core with a preheating function: while the slurry in S3 is extruded into the mold, a prepared metal etching mesh and a porous heating ceramic are preset in the mold. The slurry, the metal etching mesh and the porous heating ceramic in the mold are bonded into a ceramic embryo. The ceramic embryo is then successively filled with powder, wax is removed, and sintered to form a porous ceramic atomizer core with a preheating function, wherein the first connecting portion and the second connecting portion at both ends of the porous heating ceramic are respectively connected to the two ends of the metal etching mesh.

[0018] Preferably, the bottom side of the metal etching mesh in S1 is provided with a gripping foot, and the gripping foot is used to connect the porous insulating ceramic.

[0019] Preferably, 500g of barium titanate powder is taken from S2 and 0.8g of niobium pentoxide is added and mixed evenly, and then the above powder is synthesized in a box-type sintering furnace at 1200°C for 2h, and the synthesized material block is crushed into a powder passing through a 300-mesh sieve by a ball mill, and then aluminum oxide, silicon dioxide, and lithium carbonate are added to the powder crushed by the ball mill, wherein the total amount of aluminum oxide, silicon dioxide and lithium carbonate is 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide and lithium carbonate is aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1, and then corn starch accounting for 20% of the total weight of the powder is added, and the mixture is added. The powder was put into the ball mill jar of a ball mill with a volume of 2L, the speed of the ball mill was set to 70 rpm, and the ball milling time was 8 hours. 25% of the total weight of No. 58 paraffin was added to the powder after ball milling. The mixture of the ball-milled powder and No. 58 paraffin was heated to 70°C in a blender and stirred for 4 hours to allow the ceramic powder and paraffin to completely fuse to form a slurry. The slurry was then placed in a hot die casting machine and stirred for 1 hour. The slurry was pushed by the compressed air pressure of the hot die casting machine and squeezed into a mold to form a rectangular ceramic body. The ceramic body was then placed in a box-type sintering furnace and made into porous heating ceramics through powder burying, wax removal, and sintering.

[0020] Preferably, 500 g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is taken from S3, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then 20% of corn starch by weight of the mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is added, and then the mixture is placed in a ball mill jar of a ball mill. After the ball milling is completed, 25% of No. 58 paraffin and 2% of stearic acid by weight of the mixture of quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch are added, and then these compounds are sent into a mixer, heated and stirred to form a slurry, and then the slurry is placed in a hot die casting machine for stirring, and then the slurry is squeezed into a mold.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects:

[0022] The present application breaks through the existing porous ceramic atomization core with a single function. The current porous ceramic atomization core mainly adopts traditional ceramic materials such as silicon oxide and aluminum oxide. These materials are insulators and have no conductivity. Therefore, the porous ceramic only plays the role of conducting the atomized liquid during use. For the viscous atomized liquid, this single-function ceramic atomization core cannot preheat the atomized liquid, which can easily cause the core to become sticky, seriously restricting the application of the product and customer experience. Based on the inherent defects of the above existing solutions, this patent proposes a new solution, which is to add a layer of porous heating ceramic with conductive function on the surface of the existing atomization core. When the porous insulating ceramic and the heating wire structure or the metal etching mesh are working, the porous heating ceramic works at the same time to preheat the atomized liquid. After heating, the viscosity of the atomized liquid decreases and the fluidity improves. The flow resistance inside the porous insulating ceramic is reduced, thereby ensuring sufficient oil supply to the atomization surface, effectively avoiding the occurrence of sticky smell while increasing the atomization amount under the same power and reducing power consumption.

[0023] In summary, the porous ceramic atomizing core with a preheating function prepared in the present invention has the advantages of reducing power consumption, increasing atomization volume, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of a method for preparing a porous ceramic atomizing core with a preheating function according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of the prepared porous ceramic atomizer core with preheating function;

[0026] Figure 3 yes Figure 2 Schematic diagram of the structure of medium-porous insulating ceramics;

[0027] Figure 4 yes Figure 2Schematic diagram of the heating wire structure;

[0028] Figure 5 is a flow chart of a method for preparing a porous ceramic atomizing core with a preheating function according to another embodiment of the present invention;

[0029] Figure 6 yes Figure 5 Schematic diagram of the structure of the prepared porous ceramic atomizer core with preheating function;

[0030] Among them, there are porous insulating ceramic 1, porous heating ceramic 2, metal heating wire 3, first lead 4, second lead 5, metal etching mesh 6, first connecting part 7, and second connecting part 8. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0033] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] Example 1

[0037] In this embodiment, a method for preparing a porous ceramic atomizing core with a preheating function is proposed. The prepared porous ceramic atomizing core with a preheating function can have a preheating function. When the atomized liquid flows to the atomizing surface of this application, it carries a certain amount of heat, reducing the power consumption of the atomizing surface, so that the atomizing surface produces a larger amount of atomization under the same heating power.

[0038] like Figure 1 As shown, in one embodiment of the present invention, the method for preparing a porous ceramic atomizing core with a preheating function of the present invention comprises the following steps:

[0039] S1. Preparation of heating wire structure: A spiral metal heating wire 3 is formed from an alloy heating wire, and then a first lead 4 and a second lead 5 are connected to the two ends of the spiral metal heating wire 3 to form a heating wire structure. Specifically, in S1, a nickel-chromium alloy heating wire (Ni80Cr20) with a wire diameter of 0.16 mm is taken and installed on a wire winding machine. The nickel-chromium alloy heating wire is then processed by the wire winding machine to form a spiral metal heating wire 3 with a resistance of 1.3 Ω. The first lead 4 and the second lead 5 are then welded to the two ends of the spiral metal heating wire 3 to form the heating wire structure. The wire diameters of the first lead 4 and the second lead 5 are 0.25 mm.

[0040] S2, preparation of porous heating ceramic 2: take the ingredients of porous heating ceramic 2 and then synthesize them, crush them after synthesis, and then perform ball milling on the secondary ingredients, then stir and heat to form a slurry, then put the slurry into a hot die casting machine for stirring, and then squeeze the slurry into a mold to form a hollow cylindrical ceramic embryo, and then bury the ceramic embryo in powder, remove wax, and sinter it to form porous heating ceramic 2. Specifically, take 500g of barium titanate powder in S2 and add 0.8g of niobium pentoxide to mix evenly, then synthesize the above powders in a box-type sintering furnace at high temperature for a certain time, such as synthesizing at 1200℃ for 2h, and the synthesized material block is crushed into After passing through a 300-mesh sieve, add glassy phase materials such as aluminum oxide, silicon dioxide, and lithium carbonate to the powder crushed by the ball mill, wherein the total amount of aluminum oxide, silicon dioxide, and lithium carbonate is 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide, and lithium carbonate is aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1. Then add corn starch accounting for 20% of the total weight of the powder (a mixture of all powders of barium titanate powder, aluminum oxide, silicon dioxide, and lithium carbonate). After weighing all the above ingredients according to the proportion, put them into the ball mill jar of a ball mill with a volume of 2L (wherein Material: ball = 2:1, that is, the mass ratio of the powder to be ground and the grinding medium (ball) in the ball mill is 2:1), the ball mill speed is set to 70 rpm, the ball milling time is 8 hours, and 25% of the total weight of No. 58 paraffin wax (a mixture of all the powders of barium titanate powder, niobium pentoxide, aluminum oxide, silicon dioxide, lithium carbonate and corn starch) is added to the powder after ball milling. Then, the mixture of the ball-milled powder and No. 58 paraffin wax is heated to 70°C in a blender and stirred for 4 hours to completely fuse the ceramic powder and paraffin wax to form a slurry. Then, the slurry is placed in a hot die casting machine and stirred for 1 hour. Under the pressure of compressed air from a hot die-casting machine, a hollow cylindrical ceramic body is squeezed into a mold. The ceramic body is then placed in a box-type sintering furnace and subjected to powder embedding, wax removal, and sintering (at a sintering temperature of 1200°C) to form a porous heating ceramic 2. The porous heating ceramic 2 is a conductive ceramic, which is a semiconductor inorganic non-metallic material with adjustable resistance (such as barium titanate ceramic, silicon carbide ceramic, etc., and barium titanate ceramic is selected in this embodiment). The barium titanate ceramic used is prepared by doping rare earth elements such as niobium pentoxide, lanthanum trioxide, or yttrium trioxide as a semiconducting agent into barium titanate and titanium dioxide powders.

[0041] S3, preparation of porous insulating ceramic 1 (thickness of 0.5-1mm): take the ingredients of porous insulating ceramic 1 and put them into a ball mill. After the ball milling is completed, the ingredients are secondary-mixed and sent to a mixer for heating and stirring to form a slurry. The slurry is then put into a hot die-casting machine for stirring. The slurry is then squeezed into a mold to obtain porous insulating ceramic 1. Specifically, 500g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder (bismuth borosilicate system melting point is about 700°C) is taken from S3, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then quartz sand, diatomaceous earth, alumina and low-temperature glass powder are added. The total weight of the mixture of glass powder and corn starch is 20%, and then the mixture is placed in the ball mill of the ball mill with a capacity of 2L (wherein the material: ball = 2:1, that is, the mass ratio of the powder to be ground and the grinding medium (ball) in the ball mill is 2:1). After the ball milling is completed, quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch with a total weight of 25% No. 58 paraffin and 2% stearic acid are added. Then these compounds are sent to the mixer for heating and stirring to form a slurry (heated to 70°C in the mixer and stirred for 4h). The slurry is then placed in the hot die casting machine and stirred (1H), and then the slurry is squeezed into the mold;

[0042] S4. Preparation of a porous ceramic atomizer core with a preheating function: while the slurry in S3 is squeezed into the mold, a prepared heating wire structure and a porous heating ceramic 2 are preset in the mold. The slurry, heating wire structure and porous heating ceramic 2 in the mold are bonded into a ceramic embryo. The ceramic embryo is then successively powdered, waxed and sintered (sintering temperature 700°C) to form a porous ceramic atomizer core with a preheating function, wherein the first lead 4 and the second lead 5 of the heating wire structure are respectively connected to the electrodes at both ends of the porous heating ceramic 2. After the porous ceramic atomizer core with a preheating function of the present invention is prepared, it is connected to a battery for use. After being powered by the battery, the two (porous heating ceramic 2 and the heating wire structure) work simultaneously to generate heat to achieve the functions of preheating and atomization.

[0043] Specific reference Figure 2-4, is a structural schematic diagram of a porous ceramic atomizer core with a preheating function prepared according to the preparation method of a porous ceramic atomizer core with a preheating function of the present invention. Specifically, the porous ceramic atomizer core with a preheating function includes a heating wire structure, a porous insulating ceramic 1 and a porous heating ceramic 2, wherein the heating wire structure is arranged in the porous insulating ceramic 1, the porous heating ceramic 2 is adapted to the porous insulating ceramic 1 and the porous heating ceramic 2 is sleeved on the porous insulating ceramic 1, the heating wire structure includes a metal heating wire 3, a first lead 4 and a second lead 5, the first end of the first lead 4 is connected to the first end of the metal heating wire 3, and the second lead 5 is connected to the first end of the first lead 4. The second end of a lead 4 extends out of the porous insulating ceramic 1, the second end of the first lead 4 is connected to the porous heating ceramic 2, the first end of the second lead 5 is connected to the second end of the metal heating wire 3, the second end of the second lead 5 extends out of the porous insulating ceramic 1, and the second end of the second lead 5 is connected to the porous heating ceramic 2. The first lead 4 and the second lead 5 are pure nickel wires, and the material of the metal heating wire 3 is any one of nickel-chromium alloy, iron-chromium-aluminum alloy or 316L. The second end of the first lead 4 and the second end of the second lead 5 are brazed on the porous heating ceramic 2, and the porous insulating ceramic 1 and the porous heating ceramic 2 are both columnar.

[0044] Example 2

[0045] This embodiment proposes another method for preparing a porous ceramic atomizer core with a preheating function. The porous ceramic atomizer core with a preheating function prepared thereby can have a preheating function. When the atomized liquid flows to the atomizing surface of this application, it carries a certain amount of heat, thereby reducing the power consumption of the atomizing surface, so that the atomizing surface produces a larger amount of atomization under the same heating power.

[0046] like Figure 5 As shown, in one embodiment of the present invention, the method for preparing a porous ceramic atomizing core with a preheating function of the present invention comprises the following steps:

[0047] S1. Preparation of metal etching mesh 6: An alloy heating sheet is taken and then etched by a metal etching device to prepare a metal etching mesh 6. Specifically, a nickel-chromium (Ni80Cr20) alloy heating sheet with a thickness of 0.08 mm is processed into a metal etching mesh 6 with a designed pattern by a dedicated metal etching device. The resistance of the metal etching mesh 6 is 1.3Ω. The bottom side of the metal etching mesh 6 is provided with gripping feet, which are used to connect to the porous insulating ceramic 1. That is, some gripping feet bent to 90° are provided on the periphery of the bottom lower portion of the metal etching mesh 6 so that it can penetrate into the porous insulating ceramic 1 to form a certain bonding force, thereby preventing the metal etching mesh 6 from easily detaching from the porous insulating ceramic 1;

[0048] S2, preparation of porous heating ceramic 2: take the ingredients of porous heating ceramic 2 and then synthesize them, crush them after synthesis, and then perform ball milling on the secondary ingredients, then stir and heat to form a slurry, then put the slurry into a hot die casting machine for stirring, and then squeeze the slurry into a mold to form a rectangular ceramic embryo, and then the ceramic embryo is successively buried with powder, wax removed, and sintered to form a porous heating ceramic 2, wherein the two ends of the porous heating ceramic 2 are respectively provided with a first connecting portion 7 and a second connecting portion 8. Specifically, 500g of barium titanate powder is taken from S2 and 0.8g of niobium pentoxide is added and mixed evenly, and then the above powder is placed in a box-type sintering furnace. The mixture was synthesized at 1200℃ for 2h, and the synthesized material block was crushed into a powder passing through a 300-mesh screen by a ball mill. Aluminum oxide, silicon dioxide and lithium carbonate were added to the powder after the ball mill, wherein the total amount of aluminum oxide, silicon dioxide and lithium carbonate was 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide and lithium carbonate was aluminum oxide: silicon dioxide: lithium carbonate = 1:10:1. Then, corn starch accounting for 20% of the total weight of the powder (a mixture of all powders of barium titanate powder, aluminum oxide, silicon dioxide and lithium carbonate) was added and put into the volume. The ball mill is placed in a 2L ball mill (wherein the material: ball = 2:1), the ball mill speed is set to 70 rpm, the ball milling time is 8 hours, and 25% of the total weight of No. 58 paraffin wax (a mixture of all the powders of barium titanate powder, aluminum oxide, silicon dioxide and lithium carbonate and corn starch) is added to the powder after ball milling. Then, the mixture of the ball milled powder and No. 58 paraffin wax is heated to 70°C in a blender and stirred for 4 hours to completely fuse the ceramic powder and paraffin wax to form a slurry. Then, the slurry is placed in a hot die casting machine and stirred for 1 hour. The slurry is then placed in a hot die casting machine and pressed on the die casting machine. Under the pressure of compressed air, it is squeezed into a mold to form a rectangular ceramic body, which is then placed in a box-type sintering furnace and subjected to powder embedding, wax removal, and sintering (sintering temperature 1200°C) to form a porous heating ceramic 2. The porous heating ceramic 2 is a conductive ceramic, which is a semiconductor inorganic non-metallic material with adjustable resistance (such as barium titanate ceramic, silicon carbide ceramic, etc., in this embodiment, barium titanate ceramic is selected). The barium titanate ceramic used is a rare earth element such as niobium pentoxide, lanthanum trioxide, or yttrium trioxide as a semiconducting agent doped into barium titanate and titanium dioxide powders;

[0049] S3, preparation of porous insulating ceramic 1: take the ingredients of porous insulating ceramic 1 and put them into a ball mill, after the ball milling is completed, add the ingredients again and send them into a mixer to heat and stir to form a slurry, then put the slurry into a hot die casting machine for stirring, and then squeeze the slurry into a mold to obtain porous insulating ceramic 1. Specifically, take 500g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder in S3, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then add 20% corn starch of the total weight of the mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder. Powder, then put the mixture into the ball mill jar of the ball mill, after the ball milling is completed, add quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch mixture with a total weight of 25% 58 paraffin and 2% stearic acid, then send these compounds into a blender for heating and stirring (heating to 70 ° C in the blender and stirring for 4 hours) to form a slurry, then put the slurry into a hot die casting machine and stir (1 hour), and then squeeze the slurry into a mold. In addition to the ingredients such as quartz sand, diatomaceous earth, alumina and low-temperature glass powder, the porous insulating ceramic 1 can also select materials such as calcium oxide, zinc oxide, bismuth oxide, etc.

[0050] S4. Preparation of a porous ceramic atomizer core with a preheating function: While the slurry in S3 is being squeezed into the mold, a prepared metal etching mesh 6 and a porous heating ceramic 2 are preset in the mold. The slurry, the metal etching mesh 6 and the porous heating ceramic 2 in the mold are bonded into a ceramic embryo. The ceramic embryo is then powdered, waxed and sintered in sequence to form a porous ceramic atomizer core with a preheating function, wherein the first connecting portion 7 and the second connecting portion 8 at both ends of the porous heating ceramic 2 (with a thickness of 0.5-1 mm) are respectively connected to the two ends of the metal etching mesh 6.

[0051] Please continue to refer to Figure 6 , the preparation method of the porous ceramic atomization core with a preheating function in this embodiment includes a metal etching mesh 6, a porous insulating ceramic 1 and a porous heating ceramic 2, the metal etching mesh 6 is arranged on the porous insulating ceramic 1, the porous heating ceramic 2 is adapted to the porous insulating ceramic 1 and the porous heating ceramic 2 is arranged on the porous insulating ceramic 1 and fits with the porous insulating ceramic 1, the two ends of the porous heating ceramic 2 are respectively provided with a first connecting part 7 and a second connecting part 8, the first end of the metal etching mesh 6 is connected to the first connecting part 7, and the second end of the metal etching mesh 6 is connected to the second connecting part 8, the porous insulating ceramic 1 and the porous heating ceramic 2 are both rectangular, and the metal etching mesh 6 is made of any one of nickel-chromium alloy, iron-chromium-aluminum alloy or 316L.

[0052] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of protection of the technical solution of the present invention.

Claims

1. A method for preparing a porous ceramic atomizing core with a preheating function, characterized in that: The following steps are involved: S1. Preparation of heating wire structure: A spiral metal heating wire is made from the alloy heating wire, and a first lead and a second lead are connected to both ends of the spiral metal heating wire to form a heating wire structure; S2. Preparation of porous heating ceramics: The porous heating ceramic ingredients are synthesized, crushed, and then the secondary ingredients are ball-milled. The slurry is then stirred and heated to form a slurry. The slurry is then placed in a hot die-casting machine for stirring. The slurry is then squeezed into a mold to form a hollow cylindrical ceramic body. The ceramic body is then powder-embedded, wax-removed, and sintered to form the porous heating ceramic. S3. Preparation of porous insulating ceramics: The porous insulating ceramic ingredients are placed in a ball mill. After ball milling, the ingredients are mixed again and sent to a mixer for heating and stirring to form a slurry. The slurry is then placed in a hot die casting machine for stirring and then extruded into a mold to obtain the porous insulating ceramics. S4. Preparation of a porous ceramic atomizer core with a preheating function: while the slurry in S3 is extruded into the mold, a prepared heating wire structure and porous heating ceramic are preset in the mold. The slurry, heating wire structure and porous heating ceramic in the mold are bonded into a ceramic embryo, which is then buried with powder, wax removed, and sintered in sequence to form a porous ceramic atomizer core with a preheating function, wherein the first lead and the second lead of the heating wire structure are respectively connected to the electrodes at both ends of the porous heating ceramic.

2. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 1, characterized in that: In S1, a nickel-chromium alloy heating wire with a wire diameter of 0.16 mm is taken and installed on a wire winding machine. The nickel-chromium alloy heating wire is then processed by the wire winding machine to form a spiral metal heating wire 3 with a resistance of 1.3Ω. Then, a first lead and a second lead are taken and the first lead and the second lead are welded to the two ends of the spiral metal heating wire to form a heating wire structure.

3. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 1, characterized in that: 500g of barium titanate powder is taken from S2 and 0.8g of niobium pentoxide is added and mixed evenly. Then, the above powder is synthesized in a box-type sintering furnace at 1200℃ for 2h. The synthesized material block is crushed into a powder passing through a 300-mesh sieve using a ball mill. Then, aluminum oxide, silicon dioxide, and lithium carbonate are added to the powder crushed by the ball mill, wherein the total amount of aluminum oxide, silicon dioxide, and lithium carbonate is 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide, and lithium carbonate is aluminum oxide: silicon dioxide: lithium carbonate = 1:10:

1. Then, corn starch accounting for 20% of the total weight of the powder is added and put into the container. In the ball mill jar of a ball mill with a volume of 2L, the ball mill speed is set to 70 rpm, and the ball milling time is 8 hours. After the ball milling is completed, 25% of the total weight of No. 58 paraffin wax is added to the powder. Then, the mixture of the ball-milled powder and No. 58 paraffin wax is heated to 70°C in a blender and stirred for 4 hours to allow the ceramic powder and paraffin wax to completely fuse to form a slurry. Then, the above slurry is placed in a hot die casting machine and stirred for 1 hour. The slurry is pushed by the compressed air pressure of the hot die casting machine and squeezed into the mold to form a hollow cylindrical ceramic body. Then, the above ceramic body is placed in a box-type sintering furnace and made into porous heating ceramics through powder burying, wax removal, and sintering.

4. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 1, characterized in that: In S3, 500 g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is taken, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then 20% of corn starch by weight of the mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is added, and then the mixture is placed in a ball mill jar of a ball mill. After the ball milling is completed, 25% of No. 58 paraffin and 2% of stearic acid by weight of the mixture of quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch are added, and then these compounds are sent to a mixer for heating and stirring to form a slurry, and then the slurry is placed in a hot die casting machine for stirring, and then the slurry is extruded into a mold.

5. A method for preparing a porous ceramic atomizing core with a preheating function, characterized in that: The following steps are involved: S1. Preparation of metal etching mesh: Take the alloy heating element and etch it through a metal etching device to prepare a metal etching mesh; S2. Preparation of porous heating ceramics: The porous heating ceramic ingredients are synthesized, crushed after synthesis, and then subjected to ball milling. The secondary ingredients are then stirred and heated to form a slurry. The slurry is then placed in a hot die casting machine and stirred. The slurry is then extruded into a mold to form a rectangular ceramic body. The ceramic body is then sequentially powdered, wax removed, and sintered to form the porous heating ceramic, wherein the porous heating ceramic has a first connecting portion and a second connecting portion at each end. S3. Preparation of porous insulating ceramics: The porous insulating ceramic ingredients are placed in a ball mill. After ball milling, the ingredients are mixed again and sent to a mixer for heating and stirring to form a slurry. The slurry is then placed in a hot die casting machine for stirring and then extruded into a mold to obtain the porous insulating ceramics. S4. Preparation of a porous ceramic atomizer core with a preheating function: while the slurry in S3 is extruded into the mold, a prepared metal etching mesh and a porous heating ceramic are preset in the mold. The slurry, the metal etching mesh and the porous heating ceramic in the mold are bonded into a ceramic embryo. The ceramic embryo is then successively filled with powder, wax is removed, and sintered to form a porous ceramic atomizer core with a preheating function, wherein the first connecting portion and the second connecting portion at both ends of the porous heating ceramic are respectively connected to the two ends of the metal etching mesh.

6. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 5, characterized in that: The bottom side of the metal etching mesh in S1 is provided with a gripping foot, and the gripping foot is used to connect with the porous insulating ceramic.

7. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 5, characterized in that: 500g of barium titanate powder is taken from S2 and 0.8g of niobium pentoxide is added and mixed evenly. Then, the above powder is synthesized in a box-type sintering furnace at 1200℃ for 2h. The synthesized material block is crushed into a powder passing through a 300-mesh sieve using a ball mill. Then, aluminum oxide, silicon dioxide, and lithium carbonate are added to the powder crushed by the ball mill, wherein the total amount of aluminum oxide, silicon dioxide, and lithium carbonate is 3% of the total weight of the barium titanate powder, and the weight ratio of aluminum oxide, silicon dioxide, and lithium carbonate is aluminum oxide: silicon dioxide: lithium carbonate = 1:10:

1. Then, corn starch accounting for 20% of the total weight of the powder is added and put into In the ball mill jar of a ball mill with a volume of 2L, the ball mill speed is set to 70 rpm, and the ball milling time is 8 hours. 25% of the total weight of No. 58 paraffin is added to the powder after ball milling. Then, the mixture of the ball-milled powder and No. 58 paraffin is heated to 70°C in a mixer and stirred for 4 hours to allow the ceramic powder and paraffin to completely fuse to form a slurry. Then, the above slurry is placed in a hot die casting machine and stirred for 1 hour. The slurry is pushed by the compressed air pressure of the hot die casting machine and squeezed into the mold to form a rectangular ceramic body. Then, the above ceramic body is placed in a box-type sintering furnace and made into porous heating ceramics through powder burying, wax removal, and sintering.

8. The method for preparing a porous ceramic atomizer core with a preheating function according to claim 5, characterized in that: In S3, 500 g of a mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is taken, wherein the weight ratio is quartz sand: diatomaceous earth: alumina powder: low-temperature glass powder = 2:1:1:1, and then 20% of corn starch by weight of the mixture of quartz sand, diatomaceous earth, alumina and low-temperature glass powder is added, and then the mixture is placed in a ball mill jar of a ball mill. After the ball milling is completed, 25% of No. 58 paraffin and 2% of stearic acid by weight of the mixture of quartz sand, diatomaceous earth, alumina, low-temperature glass powder and corn starch are added, and then these compounds are sent to a mixer for heating and stirring to form a slurry, and then the slurry is placed in a hot die casting machine for stirring, and then the slurry is extruded into a mold.

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