CN115259891A - Porous ceramic applied to portable Chinese herbal medicine atomizer and manufacturing method thereof - Google Patents
Porous ceramic applied to portable Chinese herbal medicine atomizer and manufacturing method thereof Download PDFInfo
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- CN115259891A CN115259891A CN202210865667.2A CN202210865667A CN115259891A CN 115259891 A CN115259891 A CN 115259891A CN 202210865667 A CN202210865667 A CN 202210865667A CN 115259891 A CN115259891 A CN 115259891A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 188
- 241000411851 herbal medicine Species 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 72
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005245 sintering Methods 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 16
- 229910052810 boron oxide Inorganic materials 0.000 claims description 15
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 230000002209 hydrophobic effect Effects 0.000 claims description 9
- 239000004005 microsphere Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 7
- 238000009694 cold isostatic pressing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 4
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
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- 238000003801 milling Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims 3
- 239000000341 volatile oil Substances 0.000 abstract description 31
- 238000000889 atomisation Methods 0.000 abstract description 17
- 238000002360 preparation method Methods 0.000 abstract description 8
- 238000004939 coking Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 55
- 230000000694 effects Effects 0.000 description 37
- 239000000306 component Substances 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000003921 oil Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000012752 auxiliary agent Substances 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 210000001161 mammalian embryo Anatomy 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000208125 Nicotiana Species 0.000 description 2
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 2
- 229940001007 aluminium phosphate Drugs 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- DWSWCPPGLRSPIT-UHFFFAOYSA-N benzo[c][2,1]benzoxaphosphinin-6-ium 6-oxide Chemical group C1=CC=C2[P+](=O)OC3=CC=CC=C3C2=C1 DWSWCPPGLRSPIT-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003571 electronic cigarette Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000037406 food intake Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- 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
- C04B38/085—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances of micro- or nanosize
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
-
- 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
- C04B35/14—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 silica
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
- C04B35/6309—Aluminium phosphates
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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
- 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
- C04B38/0645—Burnable, meltable, sublimable materials
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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
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/068—Carbonaceous materials, e.g. coal, carbon, graphite, hydrocarbons
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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
- C04B2235/32—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
Abstract
The application relates to the field of ceramics, and particularly discloses porous ceramic applied to a portable Chinese herbal medicine atomizer and a manufacturing method thereof. The porous ceramic applied to the portable Chinese herbal medicine atomizer comprises ceramic powder, wherein the ceramic powder comprises diatomite, superfine alumina and a pore-forming agent in a mass ratio of 45-75 to 20-45. The preparation method comprises the following steps: s1, preparing a billet; s2, primary sintering; and S3, preparing the porous ceramic. The porous ceramic can be used for atomizing herbal essential oil, and has the advantages of complete atomization, rapid atomization and difficult coking of the essential oil; in addition, the preparation method has the advantages of low sintering temperature, low energy consumption and simplicity in operation.
Description
Technical Field
The application relates to the field of ceramic materials, in particular to porous ceramic applied to a portable Chinese herbal medicine atomizer and a manufacturing method thereof.
Background
The portable Chinese herbal medicine essential oil atomizer is a miniature atomizer which can be conveniently carried and can be driven by rechargeable lithium polymer battery, and the Chinese herbal medicine essential oil in the medicine bag is heated to generate distilled gas to replace the traditional novel product for boiling Chinese herbal medicine. Portable Chinese herbal medicine essential oil atomizer has changed traditional Chinese herbal medicine and has need boil the ingestion mode of drinking in the crock, will refine the Chinese herbal medicine essential oil that the extraction is good through high temperature and atomize into the tiny particle, and the mode that the reuse was absorbed gets into the human body from the oral cavity, and the medicinal composition in the tiny particle is absorbed by the human body more easily, because the volume is very little, can put and carry in the trousers bag in addition, has improved the convenience greatly, is a revolutionary product.
The anther sac is the core component of atomizer, and what the anther sac adopted at present is porous ceramic as leading oily medium, and at the inside embedded piece of porous ceramic piece that generates heat, the during operation relies on the battery to provide the energy, lets the piece that generates heat generate heat, with the atomizing of adsorbed herbaceous essential oil among the porous ceramic. However, the porous ceramic used for atomization is mostly used for electronic cigarette tobacco tar, and has low heat conductivity and high heat conduction temperature. The tobacco tar mainly comprises propylene glycol and glycerol, has high viscosity and high adhesive force, and can bear high temperature of more than 200 ℃, while the herbal essential oil is refined by pure natural Chinese herbal medicines and has low concentration, and the distillation and atomization temperature is only about 100 ℃, so the existing porous ceramic is not the best choice for the Chinese herbal medicine atomizer.
Aiming at the related technologies, the inventor thinks that the traditional porous ceramic is adopted as the heat-conducting medium of the Chinese herbal medicine atomizer at present, which is easy to cause the Chinese herbal medicine liquid to be coked, i.e. the porous ceramic has the defects of low heat-conducting efficiency and poor heat-conducting effect, and the atomizer has the defect of poor atomization effect.
Disclosure of Invention
In order to provide a porous ceramic applied to a portable Chinese herbal medicine atomizer and a method for manufacturing the same.
In a first aspect, the application provides a porous ceramic applied to a portable Chinese herbal medicine atomizer, which adopts the following technical scheme:
the porous ceramic applied to the portable Chinese herbal medicine atomizer comprises ceramic powder, wherein the ceramic powder comprises diatomite, superfine alumina and a pore-forming agent in a mass ratio of 45-75 to 20-45.
By adopting the technical scheme, the diatomite, the superfine alumina and the pore-forming agent are matched in the technical scheme, and the diatomite has more pore structures and higher adsorbability, so that the diatomite can be loaded into the pore structures of the superfine alumina, and the pores of part of the superfine alumina are properly sealed, so that on one hand, through pores in the superfine alumina are blocked, the communicated pore structures are reduced, namely, the porosity is reduced, and the possibility of uneven atomization caused by herbal essential oil entering the pore diameter of the porous ceramic is reduced; on the other hand for the diatomaceous earth is located superfine alumina surface, and tiny pore is located the porous ceramic outside promptly, has reduced the absorption effect of porous ceramic to the herbal essential oil, but tiny aperture still can be stored and lock the herbal essential oil, has improved porous ceramic's oil storage effect and lock oily effect.
Meanwhile, the diatomite has a better adsorption effect, so that the pore-forming agent can be adsorbed into pores of the superfine alumina together, and after the porous ceramic is sintered, the pore-forming agent is gasified and burnt out, so that the pore diameter of the porous ceramic and the pore diameter of the superfine alumina are communicated, and a pore structure with communicated sizes is formed, so that heat absorbed by the porous ceramic can be effectively transmitted to the superfine alumina through the pore diameters with communicated sizes, and the superfine alumina can accelerate the heat dissipation effect of the porous ceramic; moreover, the herbal essential oil is not easy to enter the porous ceramic through the communicated pore diameter, so that the heat dissipation effect of the porous ceramic is improved, namely, the herbal essential oil is not easy to coke in the atomization process, and the atomization effect of the porous ceramic on the herbal essential oil is improved.
Finally, the proportion of the diatomite, the superfine alumina and the pore-forming agent is optimized in the technical scheme, the pore structure in the porous ceramic can be optimized by the proper proportion, the size of pores is reduced, the porosity of the porous ceramic is properly reduced, the oil absorption rate of the porous ceramic is reduced, and the atomization effect of the atomizer on the herbal essential oil is improved.
Preferably, the pore-forming agent comprises one or more of wood chips, graphite, charcoal, PS microspheres, PMMA microspheres, PBMA microspheres, glucose, cellulose and starch, and the particle size of the pore-forming agent is 800-1000 meshes.
By adopting the technical scheme, the particle size of the pore-forming agent is optimized, and the pore-forming agent is burnt out to form pores after the porous ceramic is sintered, so that the proper particle size of the pore-forming agent can be effectively connected with the pores on the diatomite and the pores on the superfine alumina to form a special pore structure with communicated pores; moreover, because the particle size of the pore-forming agent is smaller, the possibility that the herbal essential oil enters the inside of the porous ceramic through the fine pore diameter of the pore-forming agent is further reduced, heat can be stably transmitted, the heat dissipation effect of the porous ceramic is improved, and the atomization effect of the atomizer on the herbal essential oil is enhanced.
The type of pore-forming agent is optimized in the technical scheme, and the appropriate pore-forming agent can be transferred to the pores of the superfine alumina under the adsorption load of the diatomite, so that a pore structure with communicated sizes can be formed.
Preferably, the ceramic powder further comprises a bonding powder, and the bonding powder comprises one or two of boron oxide and aluminum dihydrogen phosphate.
Through adopting above-mentioned technical scheme, at first, preferentially in this application technical scheme add boron oxide in ceramic powder, boron oxide can change the liquid phase in sintering process, and because boron oxide gradually becomes liquid, consequently boron oxide progressively infiltrates to superfine aluminium oxide, until boron oxide completely becomes liquid, wrap up the rest components in the bonding powder, effectively improved the combination effect between each component in the ceramic powder, reduce the possibility that the interval is great among the ceramic powder leads to the pore enlargement because of the particle, the pore diameter and the porosity of porous ceramic have stably been reduced, the atomization effect of atomizer has been improved.
Secondly, this application adopts and adds aluminium dihydrogen phosphate as bonding powder in ceramic powder, and firstly, aluminium dihydrogen phosphate turns into aluminium phosphate, and aluminium phosphate has the bonding effect to through similar compatible principle, bonding powder can evenly cladding the rest of the component in ceramic powder, effectively reduces the hole in the porous ceramic promptly, reduces the porosity. In addition, in the sintering process, aluminum dihydrogen phosphate can be partially converted into active aluminum oxide, so that the adsorption effect in the ceramic powder is further improved, the combination effect among all components of the ceramic powder is further improved, and the porosity of the porous ceramic is reduced.
Finally, according to the technical scheme, the boron oxide and the aluminum dihydrogen phosphate are preferably matched to serve as bonding powder, the bonding powder can be converted into liquid in the sintering process, the wrapping and bonding of other components in the ceramic powder are achieved, in addition, a small amount of bubbles can be generated by the boron oxide in the sintering process, the bubbles can play a role of balls in the ceramic powder, and the tightness between the ceramic powder is improved; meanwhile, aluminum dihydrogen phosphate is converted into activated alumina, so that the adsorption effect of the bonding powder is increased, the porous ceramic is further compacted, the possibility of pores generated in the porous ceramic due to the inter-particle spacing is reduced, and the atomization effect of the atomizer is effectively improved.
Preferably, the adhesive also comprises a binder, a flame retardant and a plasticizer, wherein the mass ratio of the ceramic powder to the binder to the flame retardant to the plasticizer is 90-95.
Through adopting above-mentioned technical scheme, the PVA solution that adds in this application technical scheme is as the binder, because the PVA solution has the bonding effect of preferred to the particle in the binder is spherical particle, can further improve the dispersion homogeneity of binder in ceramic powder, and then cooperates with bonding powder, each component in the even bonding ceramic powder improves porous ceramic's compactness.
Meanwhile, the technical scheme optimizes the proportion of the binder in the porous ceramic, and the proper content of the binder can stably bind the rest components in the ceramic powder, thereby reducing the porosity of the porous ceramic and improving the strength of the porous ceramic. Too high content of the binder causes poor fluidity in the ceramic powder, i.e., the binder easily causes part of the ceramic powder to agglomerate, i.e., porosity with poor uniformity in the porous ceramic is obtained. The low content of the binder causes poor binding effect among the components in the ceramic powder.
In a second aspect, the application provides a preparation method of porous ceramic applied to a portable Chinese herbal medicine atomizer, which adopts the following technical scheme:
a preparation method of porous ceramic applied to a portable Chinese herbal medicine atomizer comprises the following steps: s1, preparing a billet: mixing diatomite and alumina according to the formula, adding a pore-forming agent, stirring and mixing, and carrying out cold isostatic pressing to obtain a billet; s2, primary sintering: placing the blank block in a sintering furnace, carrying out heat preservation sintering at 600-800 ℃ to obtain a prefabricated body, and crushing and sieving the prefabricated body to obtain a ceramic framework; s3, preparing porous ceramic: mixing the ceramic framework and the bonding powder to obtain ceramic powder; mixing and milling ceramic powder, a plasticizer, a binder and a flame retardant to obtain pug; ageing the pug, and performing extrusion molding to obtain a molded product; and sintering the formed product to obtain the porous ceramic.
By adopting the technical scheme, the sintering temperature of the billet is optimized in the technical scheme, the pore-forming agent can be completely burnt out at the sintering temperature of 600-800 ℃, a special pore structure with communicated big and small pores is formed, and energy is saved. The intercommunication hole that forms through the pore-forming agent can make the stable transmission of heat to superfine aluminium oxide department, improves porous ceramic radiating effect, forms even temperature field, therefore the atomizer can evenly atomize the herbaceous essential oil.
Preferably, the temperature is increased to 600-700 ℃ at the speed of 0.5-2 ℃/min in the sintering treatment, the pressure is controlled to be 70-140MPa in the cold isostatic pressing, and the pressure is maintained for 2-10min.
By adopting the technical scheme, the sintering temperature of the porous ceramic is optimized in the technical scheme, the ceramic powder is bonded and wrapped by the liquid phase which can be converted by the bonding powder at a proper temperature, and the aluminum dihydrogen phosphate can generate the active alumina, so that the bonding effect among all components in the ceramic powder is further improved, and the porosity of the porous ceramic is reduced. In addition, the matching of the binder and the bonding powder can form a cross-linked adhesive network, thereby effectively improving the strength of the porous ceramic. In addition, the proper temperature can reduce the possibility of the closure of micro pores in the porous ceramic and improve the water absorption rate of the porous ceramic.
Preferably, the bonding powder in the step S3 comprises boron oxide and aluminum dihydrogen phosphate, and the mass ratio of the boron oxide to the aluminum dihydrogen phosphate to the ceramic skeleton is 4-8:3-9.
By adopting the technical scheme, the proportion between each component of the bonding powder and the rest of the components of the ceramic powder is optimized, and the proper bonding powder can effectively bond the rest of the components of the ceramic powder. Too much bonding powder can cause agglomeration in the ceramic powder, while too little bonding powder can cause poor bonding effect among components in the ceramic powder, and the porous ceramic can not obtain uniform porosity.
Preferably, the porous ceramic is coated with a hydrophobic coating, and the temperature is kept at 120-180 ℃ for 1-5h to obtain the porous ceramic coated with the hydrophobic coating, wherein the hydrophobic coating comprises a high-temperature-resistant silane coupling agent.
By adopting the technical scheme, the technical scheme of the application is that the surface of the porous ceramic is coated with the high-temperature-resistant silane coupling agent, namely, the hydrophilic group is grafted on the surface of the porous ceramic, so that the surface of the porous ceramic obtains better hydrophilicity, namely, better oleophobic property is obtained, the wettability of the porous ceramic to herbal essential oil is reduced, the water locking property of the porous ceramic is improved, the atomizing completeness of the herbal essential oil by the atomizer is facilitated, and the atomizer obtains better atomizing effect.
In summary, the present application has the following beneficial effects:
1. according to the method, the diatomite, the superfine alumina and the pore-forming agent are matched, the pore-forming agent is adsorbed to pores of the superfine alumina together with the diatomite, the pore-forming agent is burnt out after sintering, a special pore structure with communicated sizes can be formed, small pores on the surface of the porous ceramic can store and lock the herbal essential oil, but the herbal essential oil cannot easily enter large pores of the alumina through a communication channel formed by the pore-forming agent, namely the herbal essential oil is always located on the surface of the porous ceramic in the atomization process, the possibility that the herbal essential oil is located inside the porous ceramic and cannot be easily atomized is reduced, and the atomization effect of the porous ceramic on the herbal essential oil is improved; and, through the special pore structure of porous ceramic's big or small intercommunication for the heat can effectively be transmitted to superfine aluminium oxide department, accelerates heat transfer, makes in the atomizer obtain even temperature field, reduces the possibility of herbaceous essential oil coking.
2. The particle size of the pore-forming agent is optimized, and the particle size is suitable, so that on one hand, large pores of superfine alumina and small pores of diatomite can be effectively communicated, and on the other hand, the pore size of the communicated pores is small, so that heat can be transmitted to the superfine alumina, and the heat dissipation effect of porous ceramic is accelerated; in addition, the proper pore-forming agent particle size can be completely burnt off in the sintering treatment, the influence of the pore-forming agent residue on the communication of pores and pores is reduced, and the porous ceramic obtains excellent oil locking performance and heat conduction effect.
3. The method adopts the proper sintering temperature to pre-sinter the porous ceramic, can burn off pore-forming agents in the porous ceramic at a lower temperature, optimizes the sintering temperature of the porous ceramic, can convert bonding powder into liquid at the proper temperature, wraps other components in the ceramic powder to form a cross-linked network structure, improves the bonding compactness among the components in the ceramic powder, reduces the possibility of the ceramic powder that the internal micro-pores of the porous ceramic are closed due to high sintering temperature, and stably improves the atomization effect of the porous ceramic.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples
Preparation example of pore-forming agent
Preparation example 1
10kg of graphite powder with a particle size of 800 meshes was taken as a pore-forming agent 1.
It should be noted that the pore-forming agent includes, but is not limited to, wood chips, graphite, charcoal, PS microspheres, PMMA microspheres, PBMA microspheres, glucose, cellulose, and starch.
Preparation example 2
10kg of graphite powder with the particle size of 1000 meshes is taken as a pore-forming agent 1.
Examples
Example 1
On the one hand, the application provides a porous ceramic applied to a portable Chinese herbal medicine atomizer, which comprises ceramic powder and an auxiliary agent, wherein the ceramic powder comprises diatomite, superfine alumina and a pore-forming agent 1, and the auxiliary agent comprises a binder, a flame retardant and a plasticizer. Wherein, the binder is a polystyrene solution with the mass fraction of 5%, the flame retardant is DOPO, the plasticizer is DOP, and the specific mass is shown in Table 1.
In another aspect, the present application provides a process for manufacturing a porous ceramic for use in a portable chinese herbal medicine atomizer, comprising the steps of:
adding diatomite with an average pore diameter of 5um and superfine alumina with an average pore diameter of 100um into a mixer, adding a pore-forming agent 1, and stirring and mixing uniformly to obtain mixed powder. And (3) filling the mixed powder into a rubber sleeve, sealing and putting into a cold isostatic press, controlling the pressure to be 120MPa, and maintaining the pressure for 10min to obtain an embryo block.
And (3) placing the billet in a medium temperature furnace, heating to 600 ℃ at the heating rate of 5 ℃/min, and preserving heat for 5 hours to obtain a prefabricated body. And putting the prefabricated body into a ball mill for ball milling and crushing, and sieving with a 350-mesh sieve to obtain the ceramic skeleton.
Adding the ceramic framework, the boron oxide and the aluminum dihydrogen phosphate, wherein the specific mass is shown in Table 3, into a mixer, and stirring to obtain the ceramic powder. And (3) putting the ceramic powder into a vacuum pug mill, adding an auxiliary agent, and uniformly mixing to obtain pug. And (3) ageing the pug for 40 hours, putting the pug into an extrusion molding machine, and carrying out extrusion molding under the pressure of 2MPa to obtain a molded product.
And (3) placing the molded product in a high-temperature furnace, heating to 700 ℃ at the speed of 2 ℃/min, and sintering at a low temperature for 2h to obtain the porous ceramic.
Among them, it is worth mentioning: the binding powder includes, but is not limited to, any one or a combination of two of boron oxide and aluminum dihydrogen phosphate.
Table 1 examples 1-5 ceramic backbone compositions
Table 2 examples 1-5 porous ceramic compositions
TABLE 3 examples 1 to 5 compositions of molded articles
Example 6
The difference from example 3 is that: and (3) coating a high-temperature-resistant silane coupling agent on the porous ceramic, and keeping the temperature at 180 ℃ for 5 hours to obtain the porous ceramic coated with the hydrophobic coating.
The high-temperature-resistant silane coupling agent includes, but is not limited to: any one or combination of more of silane coupling agent KH-580 and KBM-303 epoxy silane coupling agent, in this embodiment, silane coupling agent KH-580 is selected as the high temperature resistant silane coupling agent.
Example 7
The difference from example 2 is that:
and (3) filling the mixed powder into a rubber sleeve, sealing and putting into a cold isostatic press, controlling the pressure to be 80MPa, and maintaining the pressure for 8min to obtain an embryo block.
And (3) placing the billet in a medium temperature furnace, heating to 650 ℃ at the heating rate of 10 ℃/min, and preserving heat for 5h to obtain a preform. And putting the prefabricated body into a ball mill for ball milling and crushing, and sieving with a 350-mesh sieve to obtain the ceramic skeleton.
And adding the ceramic framework into a mixer, and stirring to obtain ceramic powder. And (3) putting the ceramic powder into a vacuum pug mill, adding an auxiliary agent, and uniformly mixing to obtain pug. And (3) ageing the pug for 40 hours, putting the pug into an extrusion molding machine, and performing extrusion molding under the pressure of 2MPa to obtain a molded product.
And (3) placing the formed product in a high-temperature furnace, heating to 700 ℃ at the speed of 1.5 ℃/min, and sintering at a low temperature for 2 hours to obtain the porous ceramic.
And (3) coating a high-temperature-resistant silane coupling agent on the porous ceramic, and keeping the temperature at 180 ℃ for 5 hours to obtain the porous ceramic coated with the hydrophobic coating.
Example 8
The difference from example 3 is that:
and (3) filling the mixed powder into a rubber sleeve, sealing and putting into a cold isostatic press, controlling the pressure to be 80MPa, and maintaining the pressure for 8min to obtain an embryo block.
And (3) placing the billet in a medium temperature furnace, heating to 800 ℃ at the heating rate of 5 ℃/min, and preserving heat for 5 hours to obtain a prefabricated body. And (3) putting the prefabricated body into a ball mill for ball milling and crushing, and sieving with a 400-mesh sieve to obtain the ceramic skeleton.
And adding the ceramic framework into a mixer, and stirring to obtain ceramic powder. And (3) putting the ceramic powder into a vacuum pug mill, adding an auxiliary agent, and uniformly mixing to obtain pug. And (3) ageing the pug for 40 hours, putting the pug into an extrusion molding machine, and carrying out extrusion molding under the pressure of 2MPa to obtain a molded product.
And (3) placing the formed product in a high-temperature furnace, heating to 700 ℃ at the speed of 2 ℃/min, and sintering at a low temperature for 2h to obtain the porous ceramic.
And (3) coating a high-temperature-resistant silane coupling agent on the porous ceramic, and keeping the temperature at 180 ℃ for 5 hours to obtain the porous ceramic coated with the hydrophobic coating.
Comparative example
Comparative example 1
This comparative example is different from example 1 in that no ultrafine alumina was added to prepare a porous ceramic.
Comparative example 2
The comparative example is different from example 1 in that the porous ceramic was prepared without adding the binder powder.
Performance test
(1) Water absorption test: and testing the water absorption of the porous ceramic by using a ceramic water absorption tester.
(2) And (3) detecting the aperture: testing the pore diameter of the porous ceramic according to the porous ceramic pore diameter test method (GB/T1967-1996);
(3) And (3) detecting the oil locking capacity: dropping oil drops on Kong Tao porcelain at most by using a contact angle tester, and detecting a contact angle, wherein the contact angle is strong when the contact angle is more than 150 degrees, and the contact angle is strong when the contact angle is more than 120 degrees;
TABLE 4 Performance test of examples 1-8 and comparative examples 1-2
The comparison of the performance tests in combination with table 2 can find that:
(1) By combining examples 1-5 with comparative examples 1-2, it can be seen that: the water absorption rate and the average pore diameter of the porous ceramics prepared in the embodiments 1 to 5 are both reduced, and the oil locking capacity is improved, which indicates that the porous ceramics prepared in the embodiments 1 to 5 adopt the cooperation of diatomite, ultrafine alumina and pore-forming agent, the pore-forming agent is adsorbed into the pores of the ultrafine alumina through the adsorption effect of the diatomite, and the pore-forming agent is removed through sintering, so that a special pore structure with communicated sizes is formed; therefore, the heat absorbed by the porous ceramic can be transmitted to the superfine alumina through the pore diameters communicated in size, and the heat dissipation effect of the porous ceramic is accelerated; moreover, inside the difficult aperture that gets into porous ceramic through the intercommunication of herbaceous essential oil, reduced the possibility that herbaceous essential oil blockked up pore structure, maintained porous ceramic's radiating effect, atomizing in-process promptly, the difficult coking of herbaceous essential oil further improves porous ceramic's atomization effect. As can be seen from Table 4, the porous ceramic obtained in example 3 had a small water absorption and pore size and a high oil-retaining ability, indicating that the components in the porous ceramic were suitably distributed.
(2) A comparison of example 6 and example 3 combined can find that: the water absorption rate and the average pore diameter of the porous ceramic prepared in the embodiment 6 are both reduced, and the oil locking capacity is improved, which shows that the application adopts the method that the high-temperature-resistant silane coupling agent is coated outside the porous ceramic, and hydrophilic groups are grafted on the porous ceramic through coupling grafting, so that the hydrophilic effect of the porous ceramic is improved, namely, the oleophobic effect of the porous ceramic is reduced, the absorption of the porous ceramic to herbal essential oil is reduced, and the atomization effect of the porous ceramic is stably improved.
(3) Comparison of examples 8-9 with example 3 shows that: the water absorption rate and the average pore diameter of the porous ceramics prepared in the embodiments 8 to 9 are both reduced, and the oil locking capability is improved, which indicates that the presintering junction temperature, the sintering temperature and the cold isostatic pressing pressure of the porous ceramics are optimized in the application, the pore-forming agent can be completely burned off at a proper sintering temperature, the blockage of the pore-forming agent to the special pore diameter with communicated sizes is reduced, and the stability of a heat transmission channel is maintained. Therefore, the prepared porous ceramic has the effects of surface oil storage and oil locking, stable heat transmission and stable temperature field maintaining, namely the porous ceramic can uniformly atomize the herbal essential oil. As can be seen from Table 4, the porous ceramic prepared in the example 8 has small water absorption and pore size and strong oil locking capability, which indicates that the sintering temperature, the pre-sintering temperature and the cold isostatic pressing pressure ratio of the porous ceramic are relatively proper.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The porous ceramic applied to the portable Chinese herbal medicine atomizer is characterized by comprising ceramic powder, wherein the ceramic powder comprises diatomite, superfine alumina and a pore-forming agent in a mass ratio of 45-75 to 20-45.
2. The porous ceramic applied to the portable Chinese herbal medicine atomizer according to claim 1, wherein: the pore-forming agent comprises one or more of wood chips, graphite, charcoal, PS microspheres, PMMA microspheres, PBMA microspheres, glucose, cellulose and starch, and the particle size of the pore-forming agent is 800-1000 meshes.
3. The porous ceramic applied to the portable Chinese herbal medicine atomizer according to claim 1, wherein: the ceramic powder also comprises bonding powder, wherein the bonding powder is selected from one or two of boron oxide and aluminum dihydrogen phosphate.
4. The porous ceramic applied to the portable Chinese herbal medicine atomizer according to claim 1, wherein: the adhesive comprises a PVA solution and ceramic powder, wherein the mass ratio of the ceramic powder to the adhesive to the flame retardant to the plasticizer is 90-95.
5. The method for manufacturing a porous ceramic for use in a portable herbal atomizer of any one of claims 1 to 4, comprising the steps of:
s1, preparing a billet: mixing diatomite and alumina according to the formula, adding a pore-forming agent, stirring and mixing, and carrying out cold isostatic pressing to obtain a billet;
s2, primary sintering: placing the blank block in a sintering furnace, carrying out heat preservation sintering at 600-800 ℃ to obtain a prefabricated body, and crushing and sieving the prefabricated body to obtain a ceramic framework;
s3, preparing porous ceramic: mixing the ceramic framework and the bonding powder to obtain ceramic powder; mixing and milling ceramic powder, a plasticizer, a binder and a flame retardant to obtain pug; ageing the pug, and performing extrusion molding to obtain a molded product; and sintering the formed product to obtain the porous ceramic.
6. The method for manufacturing the porous ceramic applied to the portable Chinese herbal medicine atomizer according to claim 5, wherein the method comprises the following steps: and during the sintering treatment, the temperature is increased to 600-700 ℃ at the speed of 0.5-2 ℃/min, the pressure is controlled to be 70-140MPa in the cold isostatic pressing, and the pressure is maintained for 2-10min.
7. The method for manufacturing porous ceramic used in portable atomizer for Chinese herbal medicine as claimed in claim 5, wherein: the bonding powder in the step S3 comprises boron oxide and aluminum dihydrogen phosphate, and the mass ratio of the boron oxide to the aluminum dihydrogen phosphate to the ceramic skeleton is 4-8:3-9.
8. The method for manufacturing porous ceramic used in portable atomizer for Chinese herbal medicine as claimed in claim 5, wherein: coating hydrophobic paint on the porous ceramic, and preserving heat for 1-5h at 120-180 ℃ to obtain the porous ceramic coated with the hydrophobic paint, wherein the hydrophobic paint comprises a high-temperature-resistant silane coupling agent.
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