CN116268608A - Porous ceramic atomizing core and electronic cigarette atomizer - Google Patents
Porous ceramic atomizing core and electronic cigarette atomizer Download PDFInfo
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- CN116268608A CN116268608A CN202310311263.3A CN202310311263A CN116268608A CN 116268608 A CN116268608 A CN 116268608A CN 202310311263 A CN202310311263 A CN 202310311263A CN 116268608 A CN116268608 A CN 116268608A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 360
- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000011148 porous material Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 239000011159 matrix material Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims description 69
- 239000000463 material Substances 0.000 claims description 56
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- 239000004005 microsphere Substances 0.000 claims description 32
- 239000000377 silicon dioxide Substances 0.000 claims description 32
- 239000002904 solvent Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 229910021426 porous silicon Inorganic materials 0.000 claims description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000012188 paraffin wax Substances 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 238000010345 tape casting Methods 0.000 claims description 7
- 238000001746 injection moulding Methods 0.000 claims description 5
- 239000000454 talc Substances 0.000 claims 2
- 229910052623 talc Inorganic materials 0.000 claims 2
- 238000003860 storage Methods 0.000 abstract description 29
- 239000003921 oil Substances 0.000 description 53
- 239000002002 slurry Substances 0.000 description 30
- 238000000889 atomisation Methods 0.000 description 18
- 239000000758 substrate Substances 0.000 description 16
- 238000005245 sintering Methods 0.000 description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 241000208125 Nicotiana Species 0.000 description 9
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000306 component Substances 0.000 description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 7
- 239000004926 polymethyl methacrylate Substances 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000002270 dispersing agent Substances 0.000 description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 4
- -1 ethanol) Chemical class 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 2
- 230000000391 smoking effect Effects 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- A24F40/10—Devices using liquid inhalable precursors
-
- 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
-
- 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
- A24F40/42—Cartridges or containers for inhalable precursors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- 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
- C04B35/16—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 based on silicates other than clay
- C04B35/20—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 based on silicates other than clay rich in magnesium oxide, e.g. forsterite
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/3817—Carbides
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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
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/386—Boron nitrides
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- C04B2235/3865—Aluminium nitrides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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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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- Chemical & Material Sciences (AREA)
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- Ceramic Engineering (AREA)
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- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
The invention provides a porous ceramic atomizing core, which comprises a porous ceramic body and a conductive heating element, wherein the porous ceramic body comprises a first porous ceramic layer and a second porous ceramic layer which are connected with each other, and the conductive heating element is contacted with the first porous ceramic layer; the thickness of the first porous ceramic layer is smaller than that of the second porous ceramic layer, and the heat conductivity coefficient of the first porous ceramic layer is larger than that of the second porous ceramic layer; the first porous ceramic layer comprises a first porous ceramic matrix and a plurality of first porous silica microspheres arranged in the first porous ceramic matrix, wherein the first porous ceramic matrix is internally provided with a plurality of first micropores, the first porous silica microspheres are internally provided with a plurality of second micropores, and the pore diameter of the second micropores is smaller than that of the first micropores. The porous ceramic atomizing core provided by the invention has high atomizing efficiency and better oil guiding capacity and oil storage capacity. The invention further provides the electronic cigarette atomizer.
Description
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to a porous ceramic atomizing core and an electronic cigarette atomizer.
Background
The electronic cigarette is also called virtual cigarette, steam cigarette, aerosol generating device, etc. and is mainly used for simulating smoking feeling on the premise of not affecting health so as to be used for stopping smoking or replacing cigarettes. As one of the core components of the electronic cigarette, the porous ceramic atomizer has the advantages of strong lipophilicity, uniform heating, high use temperature and the like compared with the traditional cotton core or glass fiber ropes.
Current porous ceramic atomizers generally include a porous ceramic substrate and a heat-generating substrate disposed on the porous ceramic substrate. The porous ceramic matrix is mainly prepared from silicate, diatomite and the like with very low heat conductivity coefficients serving as main materials, and has low heat conductivity; the heating matrix is mainly divided into three types of printing thick film metal, spiral metal wire and metal etching sheet.
Because the heat conductivity of the porous ceramic matrix is very low, the porous ceramic matrix has good heat insulation performance (heat is not easy to dissipate), but the low heat conductivity of the porous ceramic matrix can lead heat conduction to be untimely in turn, thereby affecting heating uniformity and heating efficiency and leading the atomization efficiency of the porous ceramic atomizer to be lower. Meanwhile, the oil guiding and storing capacity of the porous ceramic matrix is closely related to the pore size of micropores in the porous ceramic matrix, and the smaller the pore size of the micropores in the porous ceramic matrix is, the higher the porosity is, and the stronger the oil guiding and storing capacity is; however, the process capability of the current porous ceramic matrix (micropores are formed after sintering by adding a pore-forming agent) is limited, and the pore diameter of the micropores in the current porous ceramic matrix is often larger, so that the oil guiding and oil storage capability of the current porous ceramic matrix is affected.
Disclosure of Invention
The invention aims to provide a porous ceramic atomizing core which is high in atomizing efficiency and better in oil guiding capacity and oil storage capacity.
The invention provides a porous ceramic atomizing core, which comprises a porous ceramic body and a conductive heating element, wherein the porous ceramic body comprises a first porous ceramic layer and a second porous ceramic layer which are connected with each other, and the conductive heating element is contacted with the first porous ceramic layer; the thickness of the first porous ceramic layer is smaller than that of the second porous ceramic layer, and the heat conductivity coefficient of the first porous ceramic layer is larger than that of the second porous ceramic layer; the first porous ceramic layer comprises a first porous ceramic matrix and a plurality of first porous silica microspheres arranged in the first porous ceramic matrix, wherein the first porous ceramic matrix is internally provided with a plurality of first micropores, the first porous silica microspheres are internally provided with a plurality of second micropores, and the pore diameter of the second micropores is smaller than that of the first micropores.
In one implementation, the second porous ceramic layer includes a second porous ceramic matrix and a plurality of second porous silica microspheres disposed in the second porous ceramic matrix, the second porous ceramic matrix has a plurality of third micropores therein, and the second porous silica microspheres have a plurality of fourth micropores therein, wherein the pore diameter of the fourth micropores is smaller than the pore diameter of the third micropores.
In one achievable form, the particle size of the first porous silica microspheres and the particle size of the second porous silica microspheres are both 50-500 nanometers.
In one implementation, theThe specific surface area of the first porous silica microspheres and the specific surface area of the second porous silica microspheres are both greater than or equal to 100m 2 /g。
In one implementation manner, the manufacturing material of the first porous ceramic layer comprises heat conducting powder, a first main material, first porous silica microsphere powder and a first pore-forming agent, wherein the first main material is at least one of glass powder and talcum powder; the heat conduction powder, the first main material, the first porous silica microsphere powder and the first pore-forming agent are respectively prepared from the following components in parts by weight: 5-25 parts of heat conducting powder, 5-20 parts of first main material, 25-45 parts of first porous silicon dioxide microsphere powder and 15-20 parts of first pore-forming agent.
In one implementation manner, the manufacturing material of the second porous ceramic layer comprises a second main material, second porous silica microsphere powder and a second pore-forming agent, wherein the second main material is at least one of glass powder and talcum powder; the heat conduction powder, the second main material, the second porous silica microsphere powder and the second pore-forming agent are respectively prepared from the following components in parts by weight: 15-25 parts of second main material, 45-65 parts of second porous silicon dioxide microsphere powder and 15-30 parts of second pore-forming agent.
In one implementation manner, the manufacturing material of the first porous ceramic layer further comprises 10-15 parts by weight of first paraffin and 10-15 parts by weight of first stearic acid; the manufacturing material of the second porous ceramic layer further comprises 10-15 parts by weight of second paraffin and 10-15 parts by weight of second stearic acid; the first porous ceramic layer and the second porous ceramic layer are both formed by injection molding;
or the manufacturing material of the first porous ceramic layer also comprises a first solvent, wherein the weight part of the first solvent is 10-30 parts; the manufacturing material of the second porous ceramic layer also comprises a second solvent, wherein the weight part of the second solvent is 10-30 parts; the first porous ceramic layer and the second porous ceramic layer are formed by adopting a tape casting method; or the second porous ceramic layer is manufactured by adopting a tape casting method, and the first porous ceramic layer is manufactured by adopting a thick film printing method.
In one implementation, the first porous ceramic layer has a thickness of 10-200 microns and the second porous ceramic layer has a thickness of 200-2000 microns.
In one implementation, the first plurality of micropores in the first porous ceramic substrate is divided into two parts, the first part of the first micropores is spaced apart from the first porous silica microspheres, the second part of the first micropores is located around the outer sides of the first porous silica microspheres and is formed between the inner wall of the first porous ceramic substrate and the outer wall of the first porous silica microspheres, and the pore diameter of the second part of the first micropores is larger than that of the first part of the first micropores.
In one implementation manner, the first porous ceramic layer and the second porous ceramic layer are stacked up and down, the second porous ceramic layer is located above the first porous ceramic layer, and the conductive heating element is in contact with the lower surface of the first porous ceramic layer;
or, the first porous ceramic layer and the second porous ceramic layer are both in tubular structures, the second porous ceramic layer is sleeved outside the first porous ceramic layer, and the conductive heating element is in contact with the inner wall of the first porous ceramic layer.
The invention also provides an electronic cigarette atomizer which comprises the porous ceramic atomizing core.
According to the porous ceramic atomizing core provided by the invention, the porous ceramic body is arranged into the double-layer structure of the first porous ceramic layer and the second porous ceramic layer, and the conductive heating element is contacted with the first porous ceramic layer, wherein the thickness of the first porous ceramic layer is smaller than that of the second porous ceramic layer, and the heat conductivity of the first porous ceramic layer is larger than that of the second porous ceramic layer, namely, the thickness of the first porous ceramic layer is thinner and the heat conductivity is better, and when the conductive heating element works, the first porous ceramic layer can be heated quickly in a short time and the temperature is homogenized, so that the heating uniformity and the atomizing efficiency are improved; meanwhile, the second porous ceramic layer is thicker and has lower heat conductivity coefficient, so that the second porous ceramic layer has good oil storage capacity and heat insulation performance. Meanwhile, the first porous silica microspheres are arranged in the first porous ceramic layer, and micropores with smaller pore diameters than those of the first porous ceramic matrix are arranged in the first porous silica microspheres, so that the pore diameter size in the first porous ceramic layer is richer, the pore surface area ratio is higher, the oil guiding capacity and the oil storage capacity of the first porous ceramic layer are stronger, and the abundant nano micropores in the first porous silica microspheres can enable the first porous ceramic layer to conduct heat and heat atomized tobacco tar faster, so that the atomization efficiency is further improved.
Drawings
Fig. 1 is a schematic structural diagram of an electronic cigarette atomizer according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of fig. 1.
Fig. 3 is a schematic structural view of the porous ceramic atomizing core in fig. 2.
Fig. 4 is a schematic cross-sectional view of fig. 3.
Fig. 5 is a schematic cross-sectional view of an electronic cigarette atomizer according to another embodiment of the present invention.
Fig. 6 is a schematic structural view of the porous ceramic atomizing core of fig. 5.
Fig. 7 is a schematic cross-sectional view of fig. 6.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The terms upper, lower, left, right, front, rear, top, bottom and the like (if any) in the description and in the claims are used for descriptive purposes and not necessarily for describing relative positions of structures in the figures and in describing relative positions of structures. It should be understood that the use of directional terms should not be construed to limit the scope of the invention as claimed.
As shown in fig. 3 and 4, a porous ceramic atomizing core 100 according to an embodiment of the present invention includes a porous ceramic body 1 and a conductive heating element 2, where the porous ceramic body 1 includes a first porous ceramic layer 11 and a second porous ceramic layer 12 that are connected to each other, and the conductive heating element 2 is in contact with the first porous ceramic layer 11. The thickness of the first porous ceramic layer 11 is smaller than the thickness of the second porous ceramic layer 12, and the thermal conductivity of the first porous ceramic layer 11 is larger than that of the second porous ceramic layer 12. The first porous ceramic layer 11 includes a first porous ceramic substrate 111 and a plurality of first porous silica microspheres 112 disposed in the first porous ceramic substrate 111, wherein the first porous ceramic substrate 111 has a plurality of first micropores (not shown) therein, and the first porous silica microspheres 112 have a plurality of second micropores (not shown) therein, wherein the pore diameter of the second micropores is smaller than that of the first micropores.
Specifically, in the porous ceramic atomizing core 100 provided in this embodiment, by arranging the porous ceramic body 1 into a double-layer structure of the first porous ceramic layer 11 and the second porous ceramic layer 12, the conductive heating element 2 is in contact with the first porous ceramic layer 11, wherein the thickness of the first porous ceramic layer 11 is smaller than that of the second porous ceramic layer 12, and the thermal conductivity of the first porous ceramic layer 11 is greater than that of the second porous ceramic layer 12, that is, the thickness of the first porous ceramic layer 11 is thinner and the thermal conductivity is better, when the conductive heating element 2 works, the first porous ceramic layer 11 can be quickly heated in a short time, and the temperature is homogenized, so that the heating uniformity and the atomizing efficiency are improved; meanwhile, the second porous ceramic layer 12 has a relatively thick thickness and a relatively low thermal conductivity, so that the second porous ceramic layer has good oil storage capacity and heat insulation performance. Meanwhile, the first porous silica microspheres 112 are arranged in the first porous ceramic layer 11, micropores (the pore diameter of the second micropores is in a nanometer level and the pore diameter of the first micropores is in a micrometer level) smaller than the pore diameter of the first porous ceramic matrix 111 are arranged in the first porous silica microspheres 112, so that the pore diameter size in the first porous ceramic layer 11 is richer, the pore surface area ratio is higher, the oil guiding capacity and the oil storage capacity of the first porous ceramic layer 11 are stronger, and the nanometer micropores rich in the first porous silica microspheres 112 can enable the first porous ceramic layer 11 to conduct heat and heat atomized tobacco tar faster, so that the atomization efficiency is further improved.
As shown in fig. 3 and 4, as an embodiment, the second porous ceramic layer 12 includes a second porous ceramic matrix 121 and a plurality of second porous silica microspheres 122 disposed in the second porous ceramic matrix 121, wherein the second porous ceramic matrix 121 has a plurality of third micropores (not shown) therein, and the second porous silica microspheres 122 have a plurality of fourth micropores (not shown) therein, and the pore diameter of the fourth micropores is smaller than the pore diameter of the third micropores.
Specifically, by disposing the second porous silica microspheres 122 in the second porous ceramic layer 12, the second porous silica microspheres 122 have micropores therein smaller than the pore diameters of the second porous ceramic matrix 121 (the pore diameters of the fourth micropores are in the nanometer order, and the pore diameters of the third micropores are generally in the micrometer order), so that the pore diameters in the second porous ceramic layer 12 are more abundant in size, the pore surface area ratio is higher, and the oil guiding capacity and the oil storage capacity of the second porous ceramic layer 12 are stronger, thereby further improving the oil guiding capacity and the oil storage capacity of the porous ceramic atomizing core 100.
As an embodiment, the plurality of first micropores in the first porous ceramic substrate 111 are divided into two parts according to their relative positional relationship with the first porous silica microspheres 112, the first part first micropores are spaced apart from the first porous silica microspheres 112 (i.e., the part first micropores do not contact the first porous silica microspheres 112), the second part first micropores are located around the outer side of the first porous silica microspheres 112 and formed between the inner wall of the first porous ceramic substrate 111 and the outer wall of the first porous silica microspheres 112 (i.e., the part first micropores are formed by the inner wall of the first porous ceramic substrate 111 and the outer wall of the first porous silica microspheres 112 being spaced apart from each other), and the second part first micropores have a larger pore diameter than the first part first micropores. Since the first micropores in the first porous ceramic substrate 111 are divided into two portions with different pore diameters, the pore diameter size in the first porous ceramic layer 11 is richer, the pore surface area ratio is higher, and the oil guiding capability and the oil locking capability of the first porous ceramic layer 11 are stronger.
As an embodiment, the plurality of third micropores in the second porous ceramic substrate 121 are divided into two parts according to their relative positional relationship with the second porous silica microspheres 122, the first part of the third micropores is spaced apart from the second porous silica microspheres 122 (i.e., the part of the third micropores is not in contact with the second porous silica microspheres 122), the second part of the third micropores is located around the outer side of the second porous silica microspheres 122 and formed between the inner wall of the second porous ceramic substrate 121 and the outer wall of the second porous silica microspheres 122 (i.e., the part of the third micropores is formed by the inner wall of the second porous ceramic substrate 121 and the outer wall of the second porous silica microspheres 122 being spaced apart from each other), and the pore size of the second part of the third micropores is larger than that of the first part of the third micropores. Since the third micropores in the second porous ceramic substrate 121 are divided into two portions with different pore diameters, the pore diameter size in the second porous ceramic layer 12 is richer, the pore surface area ratio is higher, and the oil guiding capability and the oil locking capability of the second porous ceramic layer 12 are stronger.
As one embodiment, the particle size of the first porous silica microspheres 112 and the particle size of the second porous silica microspheres 122 are both 50-500 nanometers.
As one embodiment, the specific surface area of the first porous silica microspheres 112 and the specific surface area of the second porous silica microspheres 122 are each greater than or equal to 100m 2 And/g. Within this range, the first porous silica microspheres 112 and the second porous silica microspheres 122 have a higher pore surface area ratio.
As an embodiment, the thickness of the second porous ceramic layer 12 is at least twice the thickness of the first porous ceramic layer 11. As another embodiment, the thickness of the second porous ceramic layer 12 is at least five times the thickness of the first porous ceramic layer 11. As another embodiment, the thickness of the second porous ceramic layer 12 is at least ten times the thickness of the first porous ceramic layer 11.
As an embodiment, the thickness of the first porous ceramic layer 11 is 10 to 200 micrometers and the thickness of the second porous ceramic layer 12 is 200 to 2000 micrometers.
As shown in fig. 3 and 4, as an embodiment, the porous ceramic body 1 has a block structure as a whole, the first porous ceramic layer 11 and the second porous ceramic layer 12 are stacked up and down, the second porous ceramic layer 12 is located above the first porous ceramic layer 11, and the conductive heat generating element 2 is in contact with the lower surface of the first porous ceramic layer 11. The conductive heating element 2 may be a metal film layer, a spiral metal wire, a metal etching sheet, or the like.
As shown in fig. 6 and 7, as another embodiment, the porous ceramic body 1 has a hollow tubular structure as a whole, the first porous ceramic layer 11 and the second porous ceramic layer 12 have tubular structures, the second porous ceramic layer 12 is sleeved outside the first porous ceramic layer 11, and the conductive heating element 2 is in contact with the inner wall of the first porous ceramic layer 11. The conductive heating element 2 is a metal wire wound in a spiral structure along the inner wall of the first porous ceramic layer 11, and of course, the conductive heating element 2 may have other structures.
As an embodiment, the first porous ceramic layer 11 is made of a material including a heat conductive powder, a first main material, a first porous silica microsphere powder, and a first pore-forming agent, wherein the first main material is at least one of glass powder and talcum powder. Wherein, the weight parts of the heat conduction powder, the first main material, the first porous silicon dioxide microsphere powder and the first pore-forming agent are respectively as follows: 5-25 parts of heat conducting powder, 5-20 parts of first main material, 25-45 parts of first porous silicon dioxide microsphere powder and 15-20 parts of first pore-forming agent. Namely, the first porous ceramic layer 11 takes the first porous silica microspheres 112 as a framework, so that the pore size of the first porous ceramic layer is richer, the surface area ratio of the pores is higher, and the oil guiding capacity and the oil storage capacity are stronger; meanwhile, by adding the heat conducting powder, the heat conducting performance of the first porous ceramic layer 11 can be improved, and by means of the heat conducting powder with high heat conductivity outside the first porous silica microspheres 112 and abundant nano micropores in the first porous silica microspheres 112, the first porous ceramic layer 11 can conduct heat and heat atomized tobacco tar more quickly.
As an embodiment, the second porous ceramic layer 12 is made of a second main material, a second porous silica microsphere powder and a second pore-forming agent, and the second main material is at least one of glass frit and talcum powder. Wherein, the weight portions of the heat conduction powder, the second main material, the second porous silicon dioxide microsphere powder and the second pore-forming agent are respectively as follows: 15-25 parts of second main material, 45-65 parts of second porous silicon dioxide microsphere powder and 15-30 parts of second pore-forming agent. That is, the second porous ceramic layer 12 takes the second porous silica microspheres 122 as a framework, so that the pore size of the second porous ceramic layer is richer, the pore surface area ratio is higher, and the oil guiding capacity and the oil storage capacity are stronger.
Since the heat conducting powder is added into the manufacturing material of the first porous ceramic layer 11 and the heat conducting powder is not added into the second porous ceramic layer 12, the heat conductivity of the first porous ceramic layer 11 is larger than that of the second porous ceramic layer 12.
As an embodiment, the heat conductive powder may be aluminum nitride powder, silicon carbide powder, boron nitride powder, silver powder, copper powder, gold powder, palladium powder, platinum powder, tungsten powder, molybdenum powder, or a combination of one or more of the above metals.
As one embodiment, the first and second pore formers are both PMMA.
As an embodiment, the first porous ceramic layer 11 further comprises 10-15 parts by weight of first paraffin and 10-15 parts by weight of first stearic acid; the second porous ceramic layer 12 is made of a second paraffin and a second stearic acid, wherein the second paraffin is 10-15 parts by weight, and the second stearic acid is 10-15 parts by weight; the first porous ceramic layer 11 and the second porous ceramic layer 12 are both injection molded.
Specifically, when an injection molding process is employed, the porous ceramic atomized core 100 may be manufactured by the steps of:
s10: configuring a first ceramic slurry and a second ceramic slurry; the first ceramic slurry comprises 5-25 parts of heat conducting powder, 5-20 parts of first main materials, 25-45 parts of first porous silicon dioxide microsphere powder, 15-20 parts of first pore-forming agents, 10-15 parts of first paraffin and 10-15 parts of first stearic acid, and the materials are uniformly stirred and mixed at 50-80 ℃ to obtain the first ceramic slurry; the components of the second ceramic slurry comprise 15-25 parts of a second main material, 45-65 parts of second porous silicon dioxide microsphere powder, 15-30 parts of a second pore-forming agent, 10-15 parts of second paraffin and 10-15 parts of second stearic acid, and the materials are stirred and mixed uniformly at 50-80 ℃ to obtain the second ceramic slurry;
s20: combining the first ceramic slurry with a conductive heating element 2 (such as a heating wire), performing injection molding, then sintering for 1-3 hours at 250-300 ℃, and then sintering for 1-5 hours at 500-700 ℃ to obtain a first porous ceramic layer blank;
s30: and (3) pre-combining the second ceramic slurry with the first porous ceramic layer blank after hot pressing through a die, then sintering for 1-3 hours at the temperature of 250-300 ℃, and then sintering for 1-5 hours at the temperature of 500-700 ℃ to obtain the porous ceramic atomization core 100.
As another embodiment, the first porous ceramic layer 11 is made of a material further comprising a first solvent, wherein the weight part of the first solvent is 10-30 parts; the second porous ceramic layer 12 is made of a second solvent, wherein the weight part of the second solvent is 10-30 parts; the first porous ceramic layer 11 and the second porous ceramic layer 12 are manufactured and molded by a tape casting method. In the production, the second porous ceramic layer 12 may be produced by a casting method first, and then the first porous ceramic layer 11 may be produced by casting on the second porous ceramic layer 12 (or the first porous ceramic layer 11 may be produced by a casting method first, and then the second porous ceramic layer 12 may be produced by casting on the first porous ceramic layer 11). Meanwhile, depending on the kind of the solvent, a dispersant (e.g., phosphate) may be added to the material. The first and second solvents may be alcohols (e.g., ethanol), ethers, esters (e.g., ethyl acetate), or ketones (e.g., butanone), and the like.
Of course, in other embodiments, the first porous ceramic layer 11 may be manufactured by thick film printing, that is, the second porous ceramic layer 12 is manufactured by injection molding or casting, and then the first ceramic slurry is brush-coated on the surface of the second porous ceramic layer 12 by thick film printing through a screen.
As shown in fig. 1 to 4, an embodiment of the present invention further provides an electronic cigarette atomizer, which includes the porous ceramic atomizing core 100 described above.
As shown in fig. 1 to 4, as an embodiment, the electronic cigarette atomizer further includes a housing 4 and an oil storage body 5, where the oil storage body 5 and the ceramic atomizing core 100 are disposed in the housing 4, and the oil storage body 5 and the housing 4 may be an integral structure or a split structure (i.e., the oil storage body 5 is a single component, in this embodiment, the oil storage body 5 and the housing 4 are in a split structure). The porous ceramic body 1 in the ceramic atomizing core 100 is of a block structure as a whole, the first porous ceramic layer 11 and the second porous ceramic layer 12 are arranged in a vertically laminated way, the second porous ceramic layer 12 is positioned above the first porous ceramic layer 11, and the conductive heating element 2 is contacted with the lower surface of the first porous ceramic layer 11. An oil storage cavity 51 for storing tobacco tar is arranged in the oil storage body 5, and the oil storage cavity 51 is positioned above the ceramic atomization core 100; the bottom of the oil storage body 5 is provided with an oil outlet 52 communicated with the oil storage cavity 51, and the oil outlet 52 is correspondingly positioned above the ceramic atomizing core 100. The tobacco tar stored in the oil storage chamber 51 can pass through the oil outlet hole 52 under the action of gravity and then reach the porous ceramic body 1 of the ceramic atomizing core 100 (the tobacco tar firstly reaches the second porous ceramic layer 12) and infiltrate into the porous ceramic body 1.
As shown in fig. 1 and 2, as an embodiment, the electronic cigarette atomizer further includes a suction nozzle 6, where the suction nozzle 6 is located above the housing 4 and connected to the housing 4, and smoke generated on the ceramic atomizing core 100 can flow into the suction nozzle 6 for a user to inhale.
As shown in fig. 2, as an embodiment, a flue 53 is provided in the oil reservoir 5, and the flue 53 is separated from the oil reservoir 51 independently. The flue 53 is correspondingly located above the ceramic atomizing core 100, and the smoke generated on the ceramic atomizing core 100 can flow into the suction nozzle 6 through the flue 53.
As shown in fig. 2, as an embodiment, the electronic cigarette atomizer further includes two electrode columns 7, wherein the two electrode columns 7 are respectively and electrically connected to two ends of the conductive heating element 2 on the ceramic atomizing core 100, and the two electrode columns 7 are respectively and electrically connected to a positive electrode and a negative electrode of a power supply (not shown).
As shown in fig. 1 and 2, as an embodiment, the bottom of the housing 4 is provided with an opening, and the electronic cigarette atomizer further includes a bottom cover 41, and the bottom cover 41 is connected to the bottom opening of the housing 4 to seal the housing 4. The bottom cover 41 is provided with an air intake hole 411 for external air to enter the inside of the housing 4.
As shown in fig. 5 to 7, as another embodiment, unlike the above-described example, in this example, the porous ceramic body 1 of the ceramic atomizing core 100 has a hollow tubular structure as a whole, the first porous ceramic layer 11 and the second porous ceramic layer 12 have both a tubular structure, the second porous ceramic layer 12 is sleeved outside the first porous ceramic layer 11, and the conductive heat generating member 2 is in contact with the inner wall of the first porous ceramic layer 11. The conductive heating element 2 is a metal wire wound in a spiral structure along the inner wall of the first porous ceramic layer 11. Meanwhile, the oil storage body 5 and the shell 4 are of an integrated structure, the ceramic atomization core 100 is arranged in a flue 53 in the oil storage body 5, the oil outlet 52 is arranged on the inner wall of the flue 53, and the oil outlet 52 corresponds to the outer side wall of the ceramic atomization core 100. The tobacco tar stored in the oil storage chamber 51 can pass through the oil outlet hole 52, reach the porous ceramic body 1 of the ceramic atomizing core 100 (the tobacco tar reaches the second porous ceramic layer 12 first) and infiltrate into the porous ceramic body 1.
According to the porous ceramic atomizing core 100 provided by the embodiment, the porous ceramic body 1 is arranged into a double-layer structure of the first porous ceramic layer 11 and the second porous ceramic layer 12, the electric conduction heating element 2 is in contact with the first porous ceramic layer 11, wherein the thickness of the first porous ceramic layer 11 is smaller than that of the second porous ceramic layer 12, and the heat conductivity of the first porous ceramic layer 11 is larger than that of the second porous ceramic layer 12, namely, the thickness of the first porous ceramic layer 11 is thinner and the heat conductivity is better, and when the electric conduction heating element 2 works, the first porous ceramic layer 11 can be heated quickly in a short time and the temperature is homogenized, so that the heating uniformity and atomizing efficiency are improved; meanwhile, the second porous ceramic layer 12 has a relatively thick thickness and a relatively low thermal conductivity, so that the second porous ceramic layer has good oil storage capacity and heat insulation performance. Meanwhile, the first porous silica microspheres 112 are arranged in the first porous ceramic layer 11, micropores smaller than the pore diameters of the first porous ceramic matrix 111 are arranged in the first porous silica microspheres 112, so that the pore diameter size in the first porous ceramic layer 11 is richer, the pore surface area ratio is higher, the oil guiding capacity and the oil storage capacity of the first porous ceramic layer 11 are stronger, and the abundant nano micropores in the first porous silica microspheres 112 can enable the first porous ceramic layer 11 to conduct heat and heat atomized tobacco tar faster, so that the atomization efficiency is further improved; in addition, the second porous ceramic layer 12 is internally provided with the second porous silica microspheres 122, and the second porous silica microspheres 122 are internally provided with micropores smaller than the pore diameters of the second porous ceramic matrix 121, so that the pore diameter size in the second porous ceramic layer 12 is richer, the pore surface area ratio is higher, and the oil guiding capacity and the oil storage capacity of the second porous ceramic layer 12 are stronger, thereby further improving the oil guiding capacity and the oil storage capacity of the porous ceramic atomizing core 100.
Example 1
The ceramic atomizing core 100 in this embodiment is manufactured by a casting method, and the manufacturing steps are as follows:
s10: configuring a first ceramic slurry and a second ceramic slurry;
the first ceramic slurry comprises 10 parts of heat conducting powder, 15 parts of first main materials, 45 parts of first porous silica microsphere powder, 15 parts of first pore-forming agents and 15 parts of first solvents; the heat conducting powder is aluminum nitride powder; the first main material is glass powder; the particle size of the first porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the first pore-forming agent is PMMA, and the first solvent is ethanol;
the components of the second ceramic slurry comprise 15 parts of a second main material, 50 parts of second porous silicon dioxide microsphere powder, 20 parts of a second pore-forming agent and 15 parts of a second solvent; the second main material is glass powder; the particle size of the second porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the second pore-forming agent is PMMA, and the second solvent is ethanol;
s20: preparing a ceramic blank body by using the second ceramic slurry through a tape casting method, wherein the thickness of the ceramic blank body is controlled to be 200 microns; then brushing a first ceramic slurry on the ceramic blank, and controlling the thickness of the first ceramic slurry to be 10 microns;
s30: sintering the ceramic blank for 1-3 hours at 250-300 ℃, then sintering for 1-5 hours at 500-700 ℃, then combining with a nickel-chromium heating net, and controlling the resistance to be 1.2 ohms, thus obtaining the porous ceramic atomization core 100.
Example two
The ceramic atomizing core 100 in this embodiment is manufactured by a casting method, and the manufacturing steps are as follows:
s10: configuring a first ceramic slurry and a second ceramic slurry;
the first ceramic slurry comprises 10 parts of heat conducting powder, 15 parts of first main materials, 45 parts of first porous silica microsphere powder, 15 parts of first pore-forming agents and 15 parts of first solvents; the heat conducting powder is silver powder; the first main material is glass powder; the particle size of the first porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the first pore-forming agent is PMMA, and the first solvent is ethyl acetate;
the components of the second ceramic slurry comprise 20 parts of a second main material, 40 parts of second porous silicon dioxide microsphere powder, 15 parts of a second pore-forming agent and 25 parts of a second solvent; the second main material is glass powder; the particle size of the second porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the second pore-forming agent is PMMA, and the second solvent is ethyl acetate;
s20: preparing a ceramic blank body by using the second ceramic slurry through a tape casting method, wherein the thickness of the ceramic blank body is controlled to be 500 microns; then brushing a first ceramic slurry on the ceramic blank, and controlling the thickness of the first ceramic slurry to be 10 microns;
s30: sintering the ceramic blank for 1-3 hours at 250-300 ℃, then sintering for 1-5 hours at 500-700 ℃, and then spraying a chromium heating layer, wherein the resistance is controlled to be 1.2 ohms, thus obtaining the porous ceramic atomization core 100.
Example III
The ceramic atomizing core 100 in this embodiment is manufactured by a casting method, and the manufacturing steps are as follows:
s10: configuring a first ceramic slurry and a second ceramic slurry;
the first ceramic slurry comprises 10 parts of heat conducting powder, 15 parts of first main materials, 45 parts of first porous silicon dioxide microsphere powder, 15 parts of first pore-forming agents, 13 parts of first solvents and 2 parts of first dispersing agents; the heat conducting powder is silver powder; the first main material is glass powder; the particle size of the first porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the first pore-forming agent is PMMA, the first solvent is butanone, and the first dispersing agent is phosphate;
the components of the second ceramic slurry comprise 20 parts of a second main material, 40 parts of second porous silicon dioxide microsphere powder, 15 parts of a second pore-forming agent, 23 parts of a second solvent and 2 parts of a second dispersing agent; the second main material is glass powder; the particle size of the second porous silica microsphere powder is 50-500 nanometers, and the specific surface area is more than or equal to 100m 2 /g, nano micropores are formed in the sphere; the second pore-forming agent is PMMA, the second solvent is butanone, and the second dispersant is phosphate;
s20: preparing a ceramic blank body by using the second ceramic slurry through a tape casting method, wherein the thickness of the ceramic blank body is controlled to be 1000 microns; then casting a first ceramic slurry on the ceramic blank, and controlling the thickness of the first ceramic slurry to be 200 microns;
s30: sintering the ceramic blank for 1-3 hours at 250-300 ℃, then sintering for 1-5 hours at 500-700 ℃, then combining with an iron-chromium-aluminum heating net, and controlling the resistance to be 1.2 ohms, thus obtaining the porous ceramic atomization core 100.
Comparative example
The porous ceramic atomizing core in the comparative example adopts a porous ceramic body with the porosity of 55-60%, and then a heating layer is formed by thick film printing of resistance paste on the porous ceramic body, and the resistance of the heating layer is controlled to be 1.2 ohms.
Each of the above porous ceramic atomizing cores was tested for the average atomization amount (TPM, total Particle Measure, i.e., the amount of smoke generated per suction) and the specific test data for each example and comparative example are shown in the following table:
as can be seen from the above table, the average atomization amount (TPM) of the porous ceramic atomization core 100 in each embodiment is significantly improved compared with the average atomization amount (TPM) of the conventional porous ceramic atomization core, which indicates that the atomization efficiency of the porous ceramic atomization core 100 in each embodiment is significantly improved.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A porous ceramic atomizing core, characterized by comprising a porous ceramic body (1) and a conductive heating element (2), wherein the porous ceramic body (1) comprises a first porous ceramic layer (11) and a second porous ceramic layer (12) which are connected with each other, and the conductive heating element (2) is in contact with the first porous ceramic layer (11); the thickness of the first porous ceramic layer (11) is smaller than that of the second porous ceramic layer (12), and the heat conductivity coefficient of the first porous ceramic layer (11) is larger than that of the second porous ceramic layer (12); the first porous ceramic layer (11) comprises a first porous ceramic matrix (111) and a plurality of first porous silica microspheres (112) arranged in the first porous ceramic matrix (111), wherein a plurality of first micropores are formed in the first porous ceramic matrix (111), a plurality of second micropores are formed in the first porous silica microspheres (112), and the pore diameter of the second micropores is smaller than that of the first micropores.
2. The porous ceramic atomizing core of claim 1, wherein the second porous ceramic layer (12) comprises a second porous ceramic matrix (121) and a plurality of second porous silica microspheres (122) disposed within the second porous ceramic matrix (121), the second porous ceramic matrix (121) having a plurality of third micropores therein, the second porous silica microspheres (122) having a plurality of fourth micropores therein, the fourth micropores having a pore size smaller than that of the third micropores.
3. The porous ceramic atomizing core of claim 2, wherein the particle size of the first porous silica microspheres (112) and the particle size of the second porous silica microspheres (122) are each 50-500 nanometers.
4. The porous ceramic atomizing core of claim 2, wherein a specific surface area of said first porous silica microspheres (112) and a specific surface area of said second porous silica microspheres (122) are each greater than or equal to 100m 2 /g。
5. The porous ceramic atomized core of claim 2, wherein the first porous ceramic layer (11) is made of a material comprising a heat conductive powder, a first main material, a first porous silica microsphere powder and a first pore-forming agent, the first main material being at least one of glass powder and talc; the heat conduction powder, the first main material, the first porous silica microsphere powder and the first pore-forming agent are respectively prepared from the following components in parts by weight: 5-25 parts of heat conducting powder, 5-20 parts of first main material, 25-45 parts of first porous silicon dioxide microsphere powder and 15-20 parts of first pore-forming agent.
6. The porous ceramic atomized core of claim 5, wherein the second porous ceramic layer (12) is made of a second main material, a second porous silica microsphere powder, and a second pore-forming agent, the second main material being at least one of glass frit and talc; the heat conduction powder, the second main material, the second porous silica microsphere powder and the second pore-forming agent are respectively prepared from the following components in parts by weight: 15-25 parts of second main material, 45-65 parts of second porous silicon dioxide microsphere powder and 15-30 parts of second pore-forming agent.
7. The porous ceramic atomizing core according to claim 6, wherein the first porous ceramic layer (11) is made of a material further comprising 10-15 parts by weight of a first paraffin and 10-15 parts by weight of a first stearic acid; the manufacturing material of the second porous ceramic layer (12) further comprises 10-15 parts by weight of second paraffin and 10-15 parts by weight of second stearic acid; the first porous ceramic layer (11) and the second porous ceramic layer (12) are formed by injection molding;
or the manufacturing material of the first porous ceramic layer (11) further comprises a first solvent, wherein the weight part of the first solvent is 10-30 parts; the manufacturing material of the second porous ceramic layer (12) further comprises a second solvent, wherein the weight part of the second solvent is 10-30 parts; the first porous ceramic layer (11) and the second porous ceramic layer (12) are formed by adopting a tape casting method; alternatively, the second porous ceramic layer (11) is formed by a casting method, and the first porous ceramic layer (12) is formed by thick film printing.
8. The porous ceramic atomizing core of claim 1, wherein the first porous ceramic layer (11) has a thickness of 10-200 microns and the second porous ceramic layer (12) has a thickness of 200-2000 microns.
9. The porous ceramic atomizing core according to claim 1, wherein a plurality of said first micropores in said first porous ceramic matrix (111) are divided into two parts, a first part of said first micropores being spaced apart from said first porous silica microspheres (112), a second part of said first micropores being located around the outer side of said first porous silica microspheres (112) and formed between the inner wall of said first porous ceramic matrix (111) and the outer wall of said first porous silica microspheres (112), and a second part of said first micropores having a pore diameter larger than that of said first micropores.
10. An electronic cigarette atomizer comprising the porous ceramic atomizing core of any one of claims 1-9.
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| CN202310311263.3A CN116268608A (en) | 2023-03-14 | 2023-03-14 | Porous ceramic atomizing core and electronic cigarette atomizer |
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| CN202310311263.3A CN116268608A (en) | 2023-03-14 | 2023-03-14 | Porous ceramic atomizing core and electronic cigarette atomizer |
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