CN113349454A - Ceramic atomizing core and preparation method thereof - Google Patents
Ceramic atomizing core and preparation method thereof Download PDFInfo
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- CN113349454A CN113349454A CN202110784612.4A CN202110784612A CN113349454A CN 113349454 A CN113349454 A CN 113349454A CN 202110784612 A CN202110784612 A CN 202110784612A CN 113349454 A CN113349454 A CN 113349454A
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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
- A24F40/70—Manufacture
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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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- 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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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B38/063—Preparing or treating the raw materials individually or as batches
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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
- C04B38/0635—Compounding ingredients
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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Abstract
The invention relates to the technical field of atomizers, in particular to a ceramic atomizing core and a preparation method thereof. The ceramic atomizing core disclosed by the invention is novel in structure, the ceramic can quickly absorb oil, the ceramic atomizing core is directly contacted with tobacco tar, the heat conduction is faster, the smoke flows out through the airflow channel after being heated and atomized by the porous ceramic matrix, the atomizing efficiency of the ceramic atomizing core is improved, and in addition, the ceramic atomizing core does not need to be manually wrapped with cotton, and is convenient to assemble, high in production efficiency, strong in practicability, energy-saving, safe and environment-friendly.
Description
Technical Field
The invention relates to the technical field of atomizers, in particular to a ceramic atomizing core and a preparation method thereof.
Background
At present, most of atomizing cores for electronic cigarette atomizers are porous ceramic heating elements, the process of integrally forming a metal heating wire and a porous ceramic substrate is mainly adopted, cotton needs to be wrapped on the surface of the porous ceramic heating element when the heating elements of the electronic cigarette atomizers are combined, the consistency of manual cotton wrapping is unstable, and the efficiency is low; and the stainless steel pipe is easy to oxidize after being sintered at low temperature.
Furthermore, the porous ceramic heating body applied to the tobacco tar at present is characterized in that a resistance heating wire or a printed heating circuit is embedded in the ceramic, the heating is realized by the resistance heating wire or the printed circuit, the defects of core pasting, uneven heating, infirm combination with the ceramic, complex technological process and the like exist, in addition, the existing porous ceramic base body is fixed in aperture and porosity, the thermal conductivity is easily too high or too low, the problems that the thermal conductivity and the tobacco tar atomization effect are difficult to match exist, and meanwhile, the slurry is cured and demoulded, the forming efficiency is low, the strength is limited and the application range is limited.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the ceramic atomizing core which is novel in structure and fast in oil absorption, the ceramic atomizing core is directly contacted with tobacco tar and conducts heat faster, smoke flows out through the airflow channel after being heated and atomized by the porous ceramic matrix, the atomizing efficiency of the ceramic atomizing core is improved, in addition, the porous ceramic matrix, the heating wire and the stainless steel pipe are manufactured by high-temperature sintering, the stainless steel pipe and the heating wire are silvery white, the appearance is attractive, no oxidation is caused, and the problem of color change of the tobacco tar caused by oxidation of the stainless steel is effectively solved. The high-temperature sintered product has better strength and better consistency. The ceramic atomization core with the stainless steel tube is directly contacted with tobacco tar, and the ceramic atomization core does not need to be wrapped by cotton manually, is convenient to assemble, high in production efficiency, strong in practicability, energy-saving, safe and environment-friendly.
The invention aims to provide a preparation method of a ceramic atomizing core, which is simple and efficient, is convenient to operate and control, has high quality of produced products and low cost, is beneficial to industrial production, and can effectively overcome the defects in the conventional ceramic sintering process.
The purpose of the invention is realized by the following technical scheme: a ceramic atomizing core comprises a porous ceramic matrix, a heating component and a stainless steel pipe, wherein an air flow channel is arranged in the porous ceramic matrix and penetrates through the upper surface and the lower surface of the porous ceramic matrix; the stainless steel pipe shell is silvery white, and the stainless steel sleeve is made of one or more of 304, 316 and 430 steel materials.
The porous ceramic matrix and the stainless steel pipe are manufactured by high-temperature sintering, the stainless steel pipe is silvery white and attractive in appearance, and the problem of smoke oil color change caused by metal oxidation is effectively solved; ceramic atomizing core novel structure, the oil absorption is fast, and ceramic atomizing core is direct and the tobacco tar contact, and the heat conduction is faster, and smog flows through the air current say after porous ceramic matrix heating atomizing, has promoted this ceramic atomizing core's atomization efficiency, and in addition, this ceramic atomizing core does not need artifical package cotton, equipment convenience, production efficiency height, practicality are strong, energy-conservation and safety ring protect.
Preferably, the part that generates heat includes heater embedded portion and heater extension, the both ends of heater embedded portion are connected through the welding mode with the heater extension respectively, heater embedded portion is the spiral helicine embedded circumference of locating the gas flow channel of interior duplex winding of porous ceramic matrix of locating, the one end of heater extension is extended outside the porous ceramic matrix.
According to the invention, the heating wire embedded part arranged on the heating component is a main heating part, and the heating wire extending parts connected to two ends of the heating wire embedded part play a role of a binding post and are connected with a power supply, so that the spiral heating wire embedded part generates heat after being electrified, the porous ceramic matrix is further heated, and the heating rate of the porous ceramic matrix is improved; and the embedded portion of heliciform heater extends along the central axis of air current say, and spiral setting generates heat evenly can be to the even heat conduction of porous ceramic base member, carries out the even heating to the tobacco tar through the inside infiltration of porous ceramic base member for the tobacco tar receives the hot fogging to inhale in the air current say after gaseous, and the practicality is high.
Preferably, the porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 200-1000 meshes, the mesh number of the glass powder is 1500-3000 meshes, and the mesh number of the pore-forming agent is 200-600 meshes.
According to the invention, the porous ceramic matrix prepared by adding ceramic powder, glass powder, pore-forming agent and pore-forming auxiliary agent into the raw materials of the porous ceramic material for preparing the porous ceramic matrix and mixing the ceramic powder, the glass powder, the pore-forming agent and the pore-forming auxiliary agent has the advantages of high porosity and uniform pore distribution, and the obtained porous ceramic matrix has better strength and better consistency; the dispersing agent and the paraffin wax adopted by the method can improve the dispersing effect of the pore-forming agent and the pore-forming auxiliary agent in the ceramic powder and the glass powder, so that the problem that the pore-forming agent is poor in dispersibility and poor in pore distribution uniformity of the porous ceramic matrix prepared by the method is solved, the sintered porous ceramic matrix has good strength, uniform structure and adjustable pore size and porosity, the requirements of users on different pore sizes and different porosities of the porous ceramic can be met, meanwhile, the slurry is convenient for curing and demolding, and the forming efficiency is high.
Preferably, each part of the pore-forming assistant comprises the following raw materials in parts by weight: 10-20 parts of PMMA microspheres, 1-5 parts of alumina micropowder, 1-5 parts of silica micropowder, 1-3 parts of zirconia and 1-3 parts of silica gel solution.
Preferably, the pore-forming aid is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding hydrochloric acid or ammonia water with the mass concentration of 5-8% in the stirring process until the solution is weakly acidic or weakly alkaline to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The pore-forming assistant adopted in the invention can avoid pores with smaller sizes in the porous ceramic matrix structure, so that the sintering continuous structure of the porous ceramic matrix phase can not be broken by too many small pores, and in addition, the formed pores are mostly columnar pores, so that the porosity is higher, the pore size is small, and the bonding property of the porous ceramic matrix is also enhanced due to the columnar pore structure, thereby ensuring that the porous ceramic matrix has higher strength. The raw materials of the pore-forming auxiliary agent are granulated and wrapped by using a silica gel solution, so that the specific gravity of the PMMA microspheres is improved, the problems of poor affinity and poor wettability between the PMMA microspheres and porous ceramic material slurry are solved, the PMMA microspheres can be uniformly distributed and stably suspended in the ceramic slurry, ceramic blanks with uniformly distributed pore-forming auxiliary agent are obtained through slip casting, and when the PMMA microspheres soaked by silica gel form a spherical shell at the periphery of a circular cavity after the pore-forming auxiliary agent is fired during high-temperature sintering, so that the size deformation of the blanks can be prevented; along with the continuous rise of the temperature, the silicon oxide decomposed from the silicon micropowder and the silica sol reacts with the alumina micropowder to generate a certain amount of mullite bonding phase, the mullite reaction is a micro-expansion reaction, the size change of the product can be avoided, and the size stability of the porous ceramic matrix prepared by final sintering is improved.
Preferably, each part of the ceramic powder is at least one of alumina powder, silicon carbide powder, black corundum powder, quartz sand and diatomite; more preferably, the ceramic powder comprises 5-10 parts of alumina powder, 0-20 parts of silicon carbide powder, 0-10 parts of black corundum powder, 5-40 parts of quartz sand and 5-20 parts of diatomite.
Preferably, each part of the pore-forming agent is at least one of wood powder, carbon powder, starch and phenolic resin; more preferably, each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 0.8-1.2:0.2-0.6:0.6-1.0: 0.4-0.8.
According to the invention, the pore-forming agent composed of the specific raw materials can cooperate with respective excellent performances, so that the sintered porous ceramic matrix has the advantages of good strength, high porosity, small pore size and uniform distribution.
Preferably, each part of the dispersant is a mixture of oleic acid and BYK110 dispersant in a weight ratio of 0.6-1.0: 0.4-0.8.
According to the invention, the mixed dispersant consisting of oleic acid and BYK110 dispersant according to the weight ratio of 0.6-1.0:0.4-0.8 can remarkably improve the dispersion effect of the pore-forming agent in ceramic powder and glass powder, and solves the problems that the porous ceramic matrix prepared by using the traditional pore-forming agent has poor pore distribution uniformity and larger size due to poor dispersibility, and the adopted oleic acid also has good decontamination capability, can effectively clean stains and the like in the porous ceramic matrix when sintering the porous ceramic matrix, so that the sintered porous ceramic matrix is clean and good, and the electronic cigarette manufactured by using the porous ceramic matrix has no peculiar smell and is more environment-friendly and healthy.
The invention also provides a preparation method of the ceramic atomizing core, which comprises the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) to a ball mill for ball milling for 1-3h at the rotating speed of 150-;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 70-90 ℃, and stirring for 3-4 hours to obtain wax slurry for later use;
4) placing the heating part and the stainless steel pipe in a mold, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 70-80 ℃, and injecting the wax slurry into the mold for forming by applying the air pressure of 0.4-0.6 Map;
5) putting a certain amount of the products formed in the step 4) into a sagger, then spraying a layer of alumina powder to cover all the products, and putting the sagger into an air furnace with the temperature of 400-;
6) sintering the product subjected to the pre-sintering in the step 5) in a protective atmosphere at the temperature of 900-1300 ℃ for 1-3h, and cooling to obtain a ceramic atomization core; the protective atmosphere is H2Atmosphere or N2Atmosphere or H2And N2Sintering under the condition of mixed gas, wherein the volume ratio of hydrogen to nitrogen is 25:75 or 50:50 or 75: 25.
The ceramic atomizing core prepared by the method is novel in structure and fast in oil absorption, the ceramic atomizing core is directly contacted with tobacco tar, heat conduction is faster, smoke flows out through the airflow channel after being heated and atomized by the porous ceramic matrix, and the atomizing efficiency of the ceramic atomizing core is improved. In the preparation process of the injection molding process, the sintering temperature in the step 3) needs to be strictly controlled at 700-; organic impurities including paraffin, a dispersing agent, a pore-forming agent and the like are mainly discharged during the rubber discharge treatment in the step 3), otherwise, deformation, cracking and other defects can occur. The specific operation is that the temperature is raised according to a set temperature curve and is preserved for a period of time at a specific temperature, so that the organic matters are fully burnt out and are convenient to discharge. And in the step 6), the sintering temperature needs to be strictly controlled to be 900-1300 ℃, the temperature sintering strength is better, the porous ceramic matrix is bonded more tightly, the oil leakage risk is reduced, the oxidation is not easy, if the temperature is too high, the ceramic shrinkage is large, the bonding gap between the stainless steel pipe and the porous ceramic matrix is large, the surface of the stainless steel pipe is blackened and oxidized, and the porous ceramic matrix is not sintered tightly.
The invention has the beneficial effects that: the ceramic atomizing core disclosed by the invention is novel in structure, fast in oil absorption, fast in heat conduction and high in energy saving, the ceramic atomizing core is directly contacted with tobacco tar, smoke flows out through the airflow channel after being heated and atomized by the porous ceramic matrix, and the atomizing efficiency of the ceramic atomizing core is improved.
The preparation method of the ceramic atomizing core is simple and efficient, convenient to operate and control, high in quality of produced products, low in cost, beneficial to industrial production and capable of effectively overcoming the defects in the conventional ceramic sintering process.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a perspective view of another aspect of the present invention;
fig. 4 is a bottom view of the present invention.
The reference signs are: 1-porous ceramic base, 11-airflow channel, 2-heating component, 21-heating wire embedded part, 22-heating wire extending part, 3-stainless steel pipe and 31 oil inlet.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying fig. 1-4, which are not intended to limit the present invention.
Example 1
A ceramic atomizing core comprises a porous ceramic matrix 1, a heating component 2 and a stainless steel pipe 3, wherein an air flow channel 11 is arranged inside the porous ceramic matrix 1, the air flow channel 11 penetrates through the upper surface and the lower surface of the porous ceramic matrix, a plurality of oil inlet holes 31 are formed in the side wall of the stainless steel pipe 3, the stainless steel pipe 3 is sleeved on the outer wall of the porous ceramic matrix 1, the heating component 2 is embedded in the porous ceramic matrix 1 and wound around the periphery of the air flow channel 11, a heating wire extension part 22 is arranged at the end part of the heating component 2, the heating wire extension part 22 extends out of the porous ceramic matrix 1 in a protruding mode, and the porous ceramic matrix 1 is made of porous ceramic materials through sintering; the shell of the stainless steel pipe 3 is silvery white, and the stainless steel sleeve is made of 304-grade steel materials.
The heating component 2 comprises a heating wire embedded part 21 and a heating wire extending part 22, and two ends of the heating wire embedded part 21 are respectively connected with the heating wire extending part 22 in a welding mode; the heating wire embedded part 21 is spirally embedded in the porous ceramic substrate 1 and is wound around the periphery of the air flow channel 11, and one end of the heating wire extending part extends out of the porous ceramic substrate 1.
The porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 200 meshes, the mesh number of the glass powder is 1500 meshes, and the mesh number of the pore-forming agent is 200 meshes.
Each part of the pore-forming assistant comprises the following raw materials in parts by weight: 10 parts of PMMA microspheres, 1 part of alumina micropowder, 1 part of silica micropowder, 1 part of zirconia and 1 part of silica gel solution.
The pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding hydrochloric acid with the mass concentration of 5% in the stirring process until the solution is weakly acidic to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The ceramic powder comprises 5 parts of alumina powder, 5 parts of quartz sand and 5 parts of diatomite.
Each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 0.8:0.2:0.6: 0.4.
Each part of the dispersant is a mixture of oleic acid and a BYK110 dispersant in a weight ratio of 0.6: 0.4.
The preparation method of the ceramic atomization core is prepared by the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) into a ball mill to perform ball milling for 1h at the rotating speed of 150r/min to obtain a mixture B for later use;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 70 ℃, and stirring for 3 hours to obtain wax slurry for later use;
4) placing the heating part 2 and the stainless steel pipe 3 in a mould, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 70 ℃, and applying the air pressure of 0.4Map to inject the wax slurry into the mould for forming;
5) putting a certain amount of the formed products in the step 4) into a sagger, then spreading a layer of alumina powder to cover all the products, and putting the sagger into an air furnace with the temperature of 400 ℃ for presintering for 100min for later use;
6) putting the product subjected to the pre-sintering in the step 5) into a protective atmosphere, sintering for 1h at 900 ℃, and cooling to obtain a ceramic atomizing core; the protective atmosphere is H2An atmosphere.
Example 2
A ceramic atomizing core comprises a porous ceramic matrix 1, a heating component 2 and a stainless steel pipe 3, wherein an air flow channel 11 is arranged inside the porous ceramic matrix 1, the air flow channel 11 penetrates through the upper surface and the lower surface of the porous ceramic matrix, a plurality of oil inlet holes 31 are formed in the side wall of the stainless steel pipe 3, the stainless steel pipe 3 is sleeved on the outer wall of the porous ceramic matrix 1, the heating component 2 is embedded in the porous ceramic matrix 1 and wound around the periphery of the air flow channel 11, a heating wire extension part 22 is arranged at the end part of the heating component 2, the heating wire extension part 22 extends out of the porous ceramic matrix 1 in a protruding mode, and the porous ceramic matrix 1 is made of porous ceramic materials through sintering; the shell of the stainless steel pipe 3 is silvery white, and the stainless steel sleeve is made of 316 steel.
The heating component 2 comprises a heating wire embedded part 21 and a heating wire extending part 22, and two ends of the heating wire embedded part 21 are respectively connected with the heating wire extending part 22 in a welding mode; the heating wire embedded part 21 is spirally embedded in the porous ceramic substrate 1 and is wound around the periphery of the air flow channel 11, and one end of the heating wire extending part extends out of the porous ceramic substrate 1.
The porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 400 meshes, the mesh number of the glass powder is 1800 meshes, and the mesh number of the pore-forming agent is 300 meshes.
Each part of the pore-forming assistant comprises the following raw materials in parts by weight: 13 parts of PMMA microspheres, 2 parts of alumina micropowder, 2 parts of silica micropowder, 1.5 parts of zirconia and 1.5 parts of silica gel solution.
The pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding ammonia water with the mass concentration of 6% in the stirring process until the solution is weakly alkaline to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The ceramic powder comprises 6 parts of alumina powder, 5 parts of silicon carbide powder, 3 parts of black corundum powder, 13 parts of quartz sand and 10 parts of diatomite.
Each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 0.9:0.3:0.7: 0.5.
Each part of the dispersant is a mixture of oleic acid and a BYK110 dispersant in a weight ratio of 0.7: 0.5.
The preparation method of the ceramic atomization core is prepared by the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) into a ball mill to perform ball milling for 1.5h at the rotating speed of 160r/min to obtain a mixture B for later use;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 75 ℃, and stirring for 3.3 hours to obtain wax slurry for later use;
4) placing the heating part 2 and the stainless steel pipe 3 in a mould, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 73 ℃, and applying the air pressure of 0.45Map to inject the wax slurry into the mould for forming;
5) putting a certain amount of the formed products in the step 4) into a sagger, then spraying a layer of alumina powder to cover all the products, and putting the sagger into an air furnace at 425 ℃ for presintering for 125min for later use;
6) putting the product subjected to the pre-sintering in the step 5) into a protective atmosphere, sintering for 1.5h at 1000 ℃, and cooling to obtain a ceramic atomization core; protective atmosphere is N2An atmosphere.
Example 3
A ceramic atomizing core comprises a porous ceramic matrix 1, a heating component 2 and a stainless steel pipe 3, wherein an air flow channel 11 is arranged inside the porous ceramic matrix 1, the air flow channel 11 penetrates through the upper surface and the lower surface of the porous ceramic matrix, a plurality of oil inlet holes 31 are formed in the side wall of the stainless steel pipe 3, the stainless steel pipe 3 is sleeved on the outer wall of the porous ceramic matrix 1, the heating component 2 is embedded in the porous ceramic matrix 1 and wound around the periphery of the air flow channel 11, a heating wire extension part 22 is arranged at the end part of the heating component 2, the heating wire extension part 22 extends out of the porous ceramic matrix 1 in a protruding mode, and the porous ceramic matrix 1 is made of porous ceramic materials through sintering; the shell of the stainless steel pipe 3 is silvery white, and the stainless steel sleeve is made of 430-grade steel.
The heating component 2 comprises a heating wire embedded part 21 and a heating wire extending part 22, and two ends of the heating wire embedded part 21 are respectively connected with the heating wire extending part 22 in a welding mode; the heating wire embedded part 21 is spirally embedded in the porous ceramic substrate 1 and is wound around the periphery of the air flow channel 11, and one end of the heating wire extending part extends out of the porous ceramic substrate 1.
The porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 600 meshes, the mesh number of the glass powder is 2250 meshes, and the mesh number of the pore-forming agent is 400 meshes.
Each part of the pore-forming assistant comprises the following raw materials in parts by weight: 15 parts of PMMA microspheres, 3 parts of alumina micropowder, 3 parts of silica micropowder, 2 parts of zirconia and 2 parts of silica gel solution.
The pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding hydrochloric acid with the mass concentration of 7% in the stirring process until the solution is weakly acidic to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The ceramic powder comprises 7 parts of alumina powder, 10 parts of silicon carbide powder, 5 parts of black corundum powder, 20 parts of quartz sand and 15 parts of diatomite.
Each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 1.0:0.4:0.8: 0.6.
Each part of the dispersant is a mixture of oleic acid and a BYK110 dispersant in a weight ratio of 0.8: 0.6.
The preparation method of the ceramic atomization core is prepared by the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) into a ball mill to perform ball milling for 2 hours at the rotating speed of 175r/min to obtain a mixture B for later use;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 80 ℃, and stirring for 3.5 hours to obtain wax slurry for later use;
4) placing the heating part 2 and the stainless steel pipe 3 in a mould, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 75 ℃, and applying the air pressure of 0.5Map to inject the wax slurry into the mould for forming;
5) putting a certain amount of the formed products in the step 4) into a sagger, then spreading a layer of alumina powder to cover all the products, and putting the sagger into an air furnace with the temperature of 450 ℃ for presintering for 150min for later use;
6) putting the product subjected to the pre-sintering in the step 5) into a protective atmosphere, sintering for 2 hours at the temperature of 110 ℃, and cooling to obtain a ceramic atomization core; the protective atmosphere is H2And N2Sintering under the condition of mixed gas, wherein the volume ratio of hydrogen to nitrogen is 25: 75.
Example 4
A ceramic atomizing core comprises a porous ceramic matrix 1, a heating component 2 and a stainless steel pipe 3, wherein an air flow channel 11 is arranged inside the porous ceramic matrix 1, the air flow channel 11 penetrates through the upper surface and the lower surface of the porous ceramic matrix, a plurality of oil inlet holes 31 are formed in the side wall of the stainless steel pipe 3, the stainless steel pipe 3 is sleeved on the outer wall of the porous ceramic matrix 1, the heating component 2 is embedded in the porous ceramic matrix 1 and wound around the periphery of the air flow channel 11, a heating wire extension part 22 is arranged at the end part of the heating component 2, the heating wire extension part 22 extends out of the porous ceramic matrix 1 in a protruding mode, and the porous ceramic matrix 1 is made of porous ceramic materials through sintering; the shell of the stainless steel pipe 3 is silvery white, and the stainless steel sleeve is made of 304-grade steel materials.
The heating component 2 comprises a heating wire embedded part 21 and a heating wire extending part 22, and two ends of the heating wire embedded part 21 are respectively connected with the heating wire extending part 22 in a welding mode; the heating wire embedded part 21 is spirally embedded in the porous ceramic matrix 1 and is wound around the periphery of the air flow channel 11, and one end of the heating wire extending part extends out of the porous ceramic matrix 1.
The porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 800 meshes, the mesh number of the glass powder is 2600 meshes, and the mesh number of the pore-forming agent is 500 meshes.
Each part of the pore-forming assistant comprises the following raw materials in parts by weight: 18 parts of PMMA microspheres, 4 parts of alumina micropowder, 4 parts of silica micropowder, 2.5 parts of zirconia and 2.5 parts of silica gel solution.
The pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding ammonia water with the mass concentration of 8% in the stirring process until the solution is weakly alkaline to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The ceramic powder comprises 9 parts of alumina powder, 15 parts of silicon carbide powder, 8 parts of black corundum powder, 33 parts of quartz sand and 18 parts of diatomite.
Each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 1.1:0.5:0.9: 0.7.
Each part of the dispersant is a mixture of oleic acid and a BYK110 dispersant in a weight ratio of 0.9: 0.7.
The preparation method of the ceramic atomization core is prepared by the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) into a ball mill to perform ball milling for 2.5 hours at the rotating speed of 190r/min to obtain a mixture B for later use;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 85 ℃, and stirring for 3.8 hours to obtain wax slurry for later use;
4) placing the heating part 2 and the stainless steel pipe 3 in a mould, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 78 ℃, and applying the air pressure of 0.55Map to inject the wax slurry into the mould for forming;
5) putting a certain amount of the formed products in the step 4) into a sagger, then spraying a layer of alumina powder to cover all the products, and putting the sagger into an air furnace at the temperature of 475 ℃ for presintering for 175min for later use;
6) putting the product subjected to the pre-sintering in the step 5) into a protective atmosphere, sintering for 1.5h at 1200 ℃, and cooling to obtain a ceramic atomization core; the protective atmosphere is H2And N2Sintering under the condition of mixed gas, wherein the volume ratio of hydrogen to nitrogen is 50: 50.
Example 5
A ceramic atomizing core comprises a porous ceramic matrix 1, a heating component 2 and a stainless steel pipe 3, wherein an air flow channel 11 is arranged inside the porous ceramic matrix 1, the air flow channel 11 penetrates through the upper surface and the lower surface of the porous ceramic matrix, a plurality of oil inlet holes 31 are formed in the side wall of the stainless steel pipe 3, the stainless steel pipe 3 is sleeved on the outer wall of the porous ceramic matrix 1, the heating component 2 is embedded in the porous ceramic matrix 1 and wound around the periphery of the air flow channel 11, a heating wire extension part 22 is arranged at the end part of the heating component 2, the heating wire extension part 22 extends out of the porous ceramic matrix 1 in a protruding mode, and the porous ceramic matrix 1 is made of porous ceramic materials through sintering; the shell of the stainless steel pipe 3 is silvery white, and the stainless steel sleeve is made of 316 steel.
The heating component 2 comprises a heating wire embedded part 21 and a heating wire extending part 22, and two ends of the heating wire embedded part 21 are respectively connected with the heating wire extending part 22 in a welding mode; the heating wire embedded part 21 is spirally embedded in the porous ceramic matrix 1 and is wound around the periphery of the air flow channel 11, and one end of the heating wire extending part extends out of the porous ceramic matrix 1.
The porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 1000 meshes, the mesh number of the glass powder is 3000 meshes, and the mesh number of the pore-forming agent is 600 meshes.
Each part of the pore-forming assistant comprises the following raw materials in parts by weight: 20 parts of PMMA microspheres, 5 parts of alumina micropowder, 5 parts of silica micropowder, 3 parts of zirconia and 3 parts of silica gel solution.
The pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding hydrochloric acid with the mass concentration of 8% in the stirring process until the solution is weakly acidic to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
The ceramic powder comprises 10 parts of alumina powder, 20 parts of silicon carbide powder, 10 parts of black corundum powder, 40 parts of quartz sand and 20 parts of diatomite.
Each part of the pore-forming agent is a mixture of wood powder, carbon powder, starch and phenolic resin according to the weight ratio of 1.2:0.6:1.0: 0.8.
Each part of the dispersant is a mixture of oleic acid and BYK110 dispersant in a weight ratio of 1.0: 0.8.
The preparation method of the ceramic atomization core is prepared by the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) into a ball mill to perform ball milling for 3 hours at the rotating speed of 200r/min to obtain a mixture B for later use;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 90 ℃, and stirring for 4 hours to obtain wax slurry for later use;
4) placing the heating part 2 and the stainless steel pipe 3 in a mould, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 80 ℃, and applying the air pressure of 0.6Map to inject the wax slurry into the mould for forming;
5) putting a certain amount of the formed products in the step 4) into a sagger, then spreading a layer of alumina powder to cover all the products, and putting the sagger into an air furnace with the temperature of 500 ℃ for presintering for 200min for later use;
6) putting the product subjected to the pre-sintering in the step 5) into a protective atmosphere, sintering for 3h at 1300 ℃, and cooling to obtain a ceramic atomizing core; the protective atmosphere is H2And N2Sintering under the condition of mixed gas, wherein the volume ratio of hydrogen to nitrogen is 75: 25.
Comparative example 1
This comparative example differs from example 1 above in that: the comparative example is not added with pore-forming assistant, and the rest of the comparative example is the same as example 1, and is not repeated here.
Comparative example 2
This comparative example differs from example 3 above in that: in the comparative example, no silica gel solution is added during the preparation of the pore-forming aid, and the rest of the content of the comparative example is the same as that of example 3, and is not repeated herein.
The ceramic atomizing cores obtained in examples 1, 3, 5 and comparative examples 1 to 2 were subjected to a performance test, and the test results are shown in table 1 below:
porosity was tested according to archimedes drainage method, oil absorption time was tested with 10mm x 4mm parts under the same conditions; pore size was tested according to (using Auto Pore IV 9500(Micromeritics Instrument Corporation) and thermal conductivity was tested according to (GB/T5990-.
TABLE 1
The comparison of example 1, example 3 and example 5 shows that the ceramic atomizing core prepared by the invention has the advantages of higher porosity, low thermal conductivity and the like, the porosity can reach 86 percent, and the thermal conductivity is reduced to 0.06W/(m.k).
As can be seen from the comparison among examples 1, 3 and 5 and comparative examples 1-2, the addition of the pore-forming aid can make the prepared ceramic atomizing core have the advantages of high porosity, small pore size and uniform distribution, the porosity of the ceramic atomizing core can reach 86%, and the ceramic atomizing core has wide market prospect and application value.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a pottery atomizing core, porous ceramic base member, the part and the nonrust steel pipe that generate heat which characterized in that: the inside of porous ceramic base member is equipped with the air current way, just the air current way runs through the upper surface and the lower surface of porous ceramic base member, the lateral wall of nonrust steel pipe is equipped with a plurality of inlet ports, the stainless steel pipe box is located the outer wall of porous ceramic base member, the part that generates heat inlays to be located the internal duplex winding of porous ceramic base member is located the circumference of air current way, and the tip of the part that generates heat is equipped with the heater extension, the heater extension stretches out the porous ceramic base member outward suddenly, porous ceramic base member is made by porous ceramic material sintering.
2. A ceramic atomizing core as set forth in claim 1, wherein: the heating component comprises a heating wire embedded part and a heating wire extending part, and two ends of the heating wire embedded part are respectively connected with the heating wire extending part in a welding mode; the heating wire embedded part is spirally embedded in the porous ceramic matrix and wound in the circumferential direction of the air flow channel, and one end of the heating wire extending part extends out of the porous ceramic matrix.
3. A ceramic atomizing core as set forth in claim 1, wherein: the porous ceramic material comprises the following raw materials in parts by weight:
the mesh number of the ceramic powder is 200-1000 meshes, the mesh number of the glass powder is 1500-3000 meshes, and the mesh number of the pore-forming agent is 200-600 meshes.
4. A ceramic atomizing core according to claim 3, wherein: each part of the pore-forming assistant comprises the following raw materials in parts by weight: 10-20 parts of PMMA microspheres, 1-5 parts of alumina micropowder, 1-5 parts of silica micropowder, 1-3 parts of zirconia and 1-3 parts of silica gel solution.
5. A ceramic atomizing core as set forth in claim 4, wherein: the pore-forming assistant is prepared by the following method:
s1, adding the silica gel solution into the PMMA microspheres according to the parts by weight, fully wetting the surfaces of the PMMA microspheres and attaching the PMMA microspheres to the surfaces to obtain substrate cores for later use;
s2, fully mixing the aluminum oxide micro powder, the silicon micro powder and the zirconium oxide according to parts by weight, and adding hydrochloric acid or ammonia water with the mass concentration of 5-8% in the stirring process until the solution is weakly acidic or weakly alkaline to obtain a wrapping material for later use;
s3, adding the wrapping material obtained in the step S2 into the base material core obtained in the step S1, mixing, granulating and naturally drying to obtain the pore-forming aid.
6. A ceramic atomizing core according to claim 3, wherein: each part of the ceramic powder is at least one of alumina powder, silicon carbide powder, black corundum powder, quartz sand and diatomite.
7. A ceramic atomizing core as set forth in claim 6, wherein: the ceramic powder comprises 5-10 parts of alumina powder, 0-20 parts of silicon carbide powder, 0-10 parts of black corundum powder, 5-40 parts of quartz sand and 5-20 parts of diatomite.
8. A ceramic atomizing core according to claim 3, wherein: each part of the pore-forming agent is at least one of wood powder, carbon powder, starch and phenolic resin.
9. A ceramic atomizing core according to claim 3, wherein: each part of the dispersant is a mixture of oleic acid and BYK110 dispersant according to the weight ratio of 0.6-1.0: 0.4-0.8.
10. A method of making a ceramic atomizing core according to any one of claims 1 to 9, characterized in that: the preparation method comprises the following steps:
1) uniformly mixing ceramic powder, glass powder, a pore-forming agent and a pore-forming auxiliary agent according to the parts by weight to obtain a mixture A for later use;
2) transferring the mixture A obtained in the step 1) to a ball mill for ball milling for 1-3h at the rotating speed of 150-;
3) weighing and melting paraffin according to the parts by weight, adding a dispersing agent, mixing and stirring uniformly, adding the mixture B obtained in the step 2), heating to 70-90 ℃, and stirring for 3-4 hours to obtain wax slurry for later use;
4) placing the heating part and the stainless steel pipe in a mold, transferring the wax slurry obtained in the step 3) to a forming machine with the temperature of 70-80 ℃, and injecting the wax slurry into the mold for forming by applying the air pressure of 0.4-0.6 Map;
5) putting a certain amount of the products formed in the step 4) into a sagger, then spraying a layer of alumina powder to cover all the products, and putting the sagger into an air furnace with the temperature of 400-;
6) sintering the product subjected to the pre-sintering in the step 5) in a protective atmosphere at the temperature of 900-1300 ℃ for 1-3h, and cooling to obtain a ceramic atomization core; the protective atmosphere is H2Atmosphere or N2Atmosphere or H2And N2Sintering under the condition of mixed gas.
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