CN112806613A - Preparation method of porous ceramic with nano-silver, porous ceramic, electronic cigarette atomization core and electronic cigarette - Google Patents
Preparation method of porous ceramic with nano-silver, porous ceramic, electronic cigarette atomization core and electronic cigarette Download PDFInfo
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- CN112806613A CN112806613A CN202110078540.1A CN202110078540A CN112806613A CN 112806613 A CN112806613 A CN 112806613A CN 202110078540 A CN202110078540 A CN 202110078540A CN 112806613 A CN112806613 A CN 112806613A
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- porous ceramic
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- 239000000919 ceramic Substances 0.000 title claims abstract description 60
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 238000000889 atomisation Methods 0.000 title description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 41
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000005245 sintering Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 34
- 238000000498 ball milling Methods 0.000 claims description 23
- 229920003257 polycarbosilane Polymers 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 8
- 239000008096 xylene Substances 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 229920002125 Sokalan® Polymers 0.000 claims description 7
- 239000004584 polyacrylic acid Substances 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005642 Oleic acid Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000012387 aerosolization Methods 0.000 claims 1
- 241000208125 Nicotiana Species 0.000 abstract description 13
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 13
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 13
- 239000011148 porous material Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 4
- 231100000956 nontoxicity Toxicity 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052759 nickel Inorganic materials 0.000 description 9
- 238000001914 filtration Methods 0.000 description 7
- 230000001954 sterilising effect Effects 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 nickel made to heat Chemical compound 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- A24F40/46—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
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/48—Fluid transfer means, e.g. pumps
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/70—Manufacture
Abstract
The invention provides a preparation method of porous ceramic with nano silver and porous ceramic, wherein nano silver is added into silicon carbide raw material, and the silicon carbide porous ceramic containing nano silver is prepared by mixing, forming and special high-temperature sintering preparation process. The invention also provides an electronic cigarette atomizing core and an electronic cigarette with the same, which utilize the characteristic of porous ceramics with nano-silver, absorb and filter fluid media through a large number of openings and through pore diameters to store tobacco tar, utilize the nano-silver to sterilize and disinfect, and finally atomize the tobacco tar after being electrified and heated through the conductive function of the nano-silver, and have the advantages of safety, no toxicity, sterilization and disinfection and miniaturized structure.
Description
Technical Field
The invention belongs to the technical field of porous ceramic material preparation, and particularly relates to a preparation method of a porous ceramic with nano-silver, the porous ceramic, an electronic cigarette atomizing core and an electronic cigarette.
Background
The porous ceramic material with open pore diameter and high open porosity has the characteristics of high temperature resistance, high pressure resistance, acid resistance, alkali resistance and organic medium corrosion resistance, and has the advantages of good biological inertia, controllable pore structure, high open porosity, long service life, good product regeneration performance and the like.
Therefore, the porous ceramic can be suitable for precise filtration and separation of various media, high-pressure gas exhaust silencing, gas distribution, electrolytic diaphragms and the like; in particular, ceramic membranes made of materials such as alumina, silicon carbide and the like are densely provided with micropores, have uniform pore diameter, high filtration efficiency and good chemical stability, and are widely applied to the fields of food, beverages, medicines, household drinking water, fine chemical engineering and the like.
However, the porous ceramics also have problems in use, for example, the porous ceramics may block the pore size when serving as a filter medium, and need to be cleaned regularly, and in addition, the porous ceramics only have a filtering function and no sterilization function, and cannot be adapted to the fields of domestic drinking water and swimming pools, etc., and the porous ceramics are insulators, and cannot be heated by means of electricity.
Particularly, for the electronic cigarette, the atomizing core mainly uses glass fiber, foam nickel and other materials as the tobacco tar adsorption carrier, and the tobacco tar on the atomizing core can be atomized only by adopting a heating wire heating mode, and the heating wire is generally made of iron, chromium, nickel and other alloy materials, which are extremely harmful to the human body after being heated at high temperature.
Therefore, there is a need for a porous ceramic with sterilization, disinfection and conductive functions, and an electronic cigarette with filtering, sterilization and non-toxic heating recycling functions.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a preparation method of porous ceramic with nano-silver, the porous ceramic, an electronic cigarette atomizing core and an electronic cigarette, so that the defects that the porous ceramic in the prior art has no sterilization function and no conductivity are overcome, the defect that the atomizing core in the electronic cigarette has no sterilization and disinfection functions is overcome, and the problem that the cigarette oil gas is atomized by adopting a toxic electric heating mode of an electric heating wire made of alloy materials such as iron, chromium, nickel and the like is solved.
In order to achieve the above object, in a first aspect, the present invention provides a method for preparing a porous ceramic having nano silver, the method comprising:
step S1: stirring and mixing polycarbosilane and xylene according to the mass fraction of 1: 5-10 to prepare a solution containing polycarbosilane;
step S2: carrying out ball milling mixing on 1-10% of nano silver and a silicon carbide raw material for 2-5 h;
step S3: ball-milling and mixing the solution containing polycarbosilane and the silicon carbide raw material containing nano-silver according to the mass fraction ratio of 1: 1-3, wherein the ball-milling time is 1-8 hours, and preparing slurry;
step S4: placing the carrier loaded with the slurry into water bath heating equipment, heating and stirring the carrier to remove a xylene solvent, heating and stirring the slurry to a semi-dry state, placing the carrier into a vacuum drying oven for drying, taking out the carrier after complete drying, crushing and grinding the carrier, and sieving the carrier with a 100-mesh sieve to prepare silicon carbide powder containing polycarbosilane;
step S5: putting the silicon carbide powder containing polycarbosilane into a ball mill, adding polyvinyl alcohol solution and polyacrylic acid for ball milling and mixing, pouring the mixed powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, then performing ball milling and crushing, and sieving with a sieve of 20-100 meshes to obtain granulated powder;
step S6: pouring the granulated powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, putting into a vacuum electric furnace, heating the furnace to 400 ℃, and keeping the constant temperature for 1-3 hours; and raising the temperature of the furnace to 800-1100 ℃, and keeping the temperature for 1-5 hours to prepare the silicon carbide porous ceramic product containing nano silver.
Further, in step S6, flowing nitrogen gas is also added during the sintering process, and the nitrogen gas flows through the porous ceramic article.
Further, in step S2, the silicon carbide raw material is prepared by mixing 50 mesh silicon carbide and 120 mesh silicon carbide at a ratio of 2:1 mass fraction.
Further, in step S2, after the nano silver is mixed with the silicon carbide raw material, 0.6% oleic acid is added, followed by ball milling and mixing.
Further, in step S5, the polyvinyl alcohol solution is added in an amount of 1 to 6% by mass and the concentration is 2 to 8%, and the polyacrylic acid is added in an amount of 1 to 3% by mass.
Further, in step S6, the furnace temperature is increased to 400 ℃ at a heating rate of 3-10 ℃/min, and then maintained at a constant temperature, and then increased to 800-1100 ℃ at a heating rate of 3-10 ℃/min, and then maintained at a constant temperature.
In a second aspect, the invention further provides a porous ceramic with nano silver, which is prepared by applying the preparation method of the porous ceramic with nano silver.
In a third aspect, the invention further provides an electronic cigarette atomization core, and the electronic cigarette atomization core is made of the porous ceramic with the nano silver.
In a fourth aspect, the invention further provides an electronic cigarette, which comprises the electronic cigarette atomization core.
Further, still include heating power supply, heating power supply with electron smog core electricity is connected.
The invention has the beneficial effects that:
the invention provides a preparation method of porous ceramic with nano silver and the porous ceramic prepared by the method, wherein nano silver is added into silicon carbide raw material, and the silicon carbide porous ceramic product containing nano silver is prepared by mixing, molding and special high-temperature sintering preparation process.
The invention provides an electronic cigarette atomizing core and an electronic cigarette with the same, which utilize the characteristic of porous ceramics with nano-silver, absorb and filter fluid media through a large number of through apertures of openings of the porous ceramics to store tobacco tar, and utilize the nano-silver to sterilize and disinfect, and finally, through the conductive function of the porous ceramics, the tobacco tar is atomized after being electrified and heated, thereby completely replacing the mode that the prior art utilizes glass fiber, foam nickel and other materials as tobacco tar absorption carriers and utilizes electric heating wires made of iron, chromium, nickel and other alloy materials to heat, and the electronic cigarette atomizing core has the advantages of safety, no toxicity, sterilization and miniaturization of structure.
Detailed Description
The technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1:
the embodiment provides a preparation method of porous ceramic with nano silver, which comprises the following steps:
step S1: stirring and mixing polycarbosilane and xylene according to the mass fraction of 1: 5-10 to prepare a solution containing polycarbosilane;
step S2: carrying out ball milling mixing on 1-10% of nano silver and a silicon carbide raw material for 2-5 h;
step S3: ball-milling and mixing the solution containing polycarbosilane and the silicon carbide raw material containing nano-silver according to the mass fraction ratio of 1: 1-3, wherein the ball-milling time is 1-8 hours, and preparing slurry;
step S4: placing the carrier loaded with the slurry into water bath heating equipment, heating while stirring to remove a xylene solvent, heating and stirring the slurry to a semi-dry state, placing the carrier into a vacuum drying oven for drying, further removing the solvent, taking out after complete drying, crushing and grinding, and sieving by a 100-mesh sieve to prepare silicon carbide powder containing polycarbosilane;
step S5: putting silicon carbide powder containing polycarbosilane into a ball mill, adding polyvinyl alcohol solution and polyacrylic acid for ball milling and mixing, pouring the mixed powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, then performing ball milling and crushing, and sieving with a sieve of 20-100 meshes to obtain granulated powder;
step S6: filling the granulation powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, putting into a vacuum electric furnace, heating the furnace to 400 ℃, and keeping the constant temperature for 1-3 hours; and raising the temperature of the furnace to 800-1100 ℃, and keeping the constant temperature for 1-5 hours to prepare the silicon carbide porous ceramic product containing the nano silver.
The prepared silicon carbide porous ceramic containing nano silver has the performance of sterilization and disinfection, also has excellent electric conductivity, has a large number of open through pore diameters, has strong adsorption capacity on fluid media, is suitable for precise filtration and separation, and has wide market application prospect.
In one embodiment, in step S6, flowing nitrogen gas is also added during the sintering process, and the nitrogen gas flows through the porous ceramic article to protect during the sintering process.
In one embodiment, in step S2, the silicon carbide raw material is prepared by mixing 50-mesh silicon carbide and 120-mesh silicon carbide at a ratio of 2:1 by mass fraction.
As an embodiment, in step S2, after the nano silver is mixed with the silicon carbide raw material, 0.6% of oleic acid is further added, followed by ball milling.
In one embodiment, in step S5, the polyvinyl alcohol solution is added in an amount of 1 to 6% by mass and the concentration is 2 to 8%, and the polyacrylic acid is added in an amount of 1 to 3% by mass.
In one embodiment, in step S6, the furnace temperature is increased to 400 ℃ at a temperature increase rate of 3-10 ℃/min, and then maintained at a constant temperature, and then the furnace temperature is increased to 800-1100 ℃ at a temperature increase rate of 3-10 ℃/min, and then maintained at a constant temperature. High-temperature sintering is carried out by a specified temperature rise rate and a special heating mode.
The following illustrates the preparation of porous ceramics with nanosilver according to the above method:
1) firstly, stirring and mixing polycarbosilane and xylene according to the mass fraction of 1:10 to prepare a polycarbosilane-containing solution;
2) mixing 50-mesh silicon carbide and 120-mesh silicon carbide according to the mass fraction of 2:1 to prepare a silicon carbide raw material, adding 4% of nano silver in mass fraction, adding 0.6% of oleic acid in mass fraction, and putting the mixture into a ball mill for ball milling for 2 hours;
3) adding the solution containing polycarbosilane into the silicon carbide raw material containing nano-silver according to the mass fraction of 1:1, and carrying out ball milling and mixing for 1 hour to prepare slurry;
4) putting the carrier containing the slurry into water bath heating equipment, heating the slurry by the water bath heating equipment while stirring to remove a xylene solvent, heating and stirring the slurry to a semi-dry state, putting the carrier containing the semi-dry raw material into a vacuum drying box, further drying to remove the solvent, taking out after complete drying, crushing and grinding, and then sieving by a 100-mesh sieve to prepare silicon carbide powder containing polycarbosilane;
5) putting silicon carbide powder containing polycarbosilane into a ball mill, adding 6 mass percent of polyvinyl alcohol solution with the concentration of 8 percent and 1 mass percent of polyacrylic acid, then carrying out ball milling and mixing, wherein the ball milling and mixing time is 8 hours, pouring the mixed powder into a dry pressing forming machine for a mould, carrying out pressing forming under the pressure of 100Mpa, carrying out ball milling and crushing, and sieving by a 20-mesh sieve to obtain granulation powder;
6) filling the granulation powder into a dry pressing forming machine for a mould, pressing and forming under the pressure of 100Mpa, then putting into a vacuum electric furnace, heating the furnace to 400 ℃ at the heating rate of 10 ℃/min, and then keeping the constant temperature for 3 hours; and then the furnace temperature is raised to 1100 ℃ at the heating rate of 5 ℃/min, the constant temperature is kept for 2 hours, and flowing nitrogen is added in the sintering process for protection, so that the silicon carbide porous ceramic product containing nano silver is prepared.
The silicon carbide porous ceramic containing nano silver prepared by the method has the porosity of 42 percent, the average pore diameter of 15 microns, the compressive strength of 29 MPa, and good filtering and separating performance and strength.
Example 2:
this example also provides a porous ceramic with nano-silver, which is prepared by the method of example 1. The porosity of the porous ceramic can be adjusted by adjusting the ratio of the silicon carbide raw materials, for example, 50 mesh silicon carbide and 120 mesh silicon carbide are mixed at a mass fraction of 2:1, or 50 mesh silicon carbide and 100 mesh silicon carbide are mixed at a mass fraction of 3:1, or other mesh silicon carbide is mixed at other mass fractions. In addition, the conductivity of the porous ceramic can be adjusted and the resistance value of the porous ceramic can be adjusted by adjusting the mass fraction of the nano silver.
Example 3:
this embodiment 3 still provides an electron smog core, and electron smog core is made by the porous ceramic that has nanometer silver in embodiment 2. The porous ceramic is used as an adsorption oil storage carrier of the electronic cigarette atomization core, the characteristics of high porosity, strong adsorption capacity, good sterilization and disinfection performance and good conductivity of the porous ceramic are fully utilized, the efficient adsorption and filtration sterilization of the tobacco tar are facilitated, and the technical current situation that materials such as glass fiber and foamed nickel are used as the tobacco tar adsorption carrier at present is solved.
Example 4:
this embodiment 4 still provides an electron cigarette, includes as the electron smog core in embodiment 3, still includes heating power supply, and heating power supply is connected with electron smog core electricity.
Through heating power supply to electron smog core circular telegram, because electron smog core itself has electric conductive property, certain resistance value has, self can produce the heat when electron smog core circular telegram, under the condition that need not extra electric heater, electron smog core circular telegram heating can be with the tobacco tar gas atomization of adsorbing on it, form electron smog, the plug that intercepts at normal during operation to electron smog core has the ability of decomposing and fusing, be favorable to not having secondary pollution's washing recovery, it is nontoxic harmless, still can adjust the mass fraction of nanometer silver, and then adjust porous ceramic's resistance value, adjust the power of electron smog core, solve the present technical current situation that utilizes the heating wire that iron, chromium, alloy materials such as nickel made to heat, it is safe nontoxic to have, the disinfection of disinfecting, the advantage of small-size structure.
Compared with the prior art, the invention provides a preparation method of porous ceramic with nano silver and the porous ceramic prepared by the preparation method, the nano silver is added into a silicon carbide raw material, and the silicon carbide porous ceramic containing the nano silver is prepared by mixing, forming and special high-temperature sintering preparation processes.
The invention provides an electronic cigarette atomizing core and an electronic cigarette with the same, which utilize the characteristic of porous ceramics with nano-silver, absorb and filter fluid media through a large number of through apertures of openings of the porous ceramics to store tobacco tar, and utilize the nano-silver to sterilize and disinfect, and finally, through the conductive function of the porous ceramics, the tobacco tar is atomized after being electrified and heated, thereby completely replacing the mode that the prior art utilizes glass fiber, foam nickel and other materials as tobacco tar absorption carriers and utilizes electric heating wires made of iron, chromium, nickel and other alloy materials to heat, and the electronic cigarette atomizing core has the advantages of safety, no toxicity, sterilization and miniaturization of structure.
Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only to the preferred embodiments, and the present invention is not limited to the above-described embodiments.
Claims (10)
1. A method for preparing porous ceramics with nano silver is characterized by comprising the following steps:
step S1: stirring and mixing polycarbosilane and xylene according to the mass fraction of 1: 5-10 to prepare a solution containing polycarbosilane;
step S2: carrying out ball milling mixing on 1-10% of nano silver and a silicon carbide raw material for 2-5 h;
step S3: ball-milling and mixing the solution containing polycarbosilane and the silicon carbide raw material containing nano-silver according to the mass fraction ratio of 1: 1-3, wherein the ball-milling time is 1-8 hours, and preparing slurry;
step S4: placing the carrier loaded with the slurry into water bath heating equipment, heating and stirring the carrier to remove a xylene solvent, heating and stirring the slurry to a semi-dry state, placing the carrier into a vacuum drying oven for drying, taking out the carrier after complete drying, crushing and grinding the carrier, and sieving the carrier with a 100-mesh sieve to prepare silicon carbide powder containing polycarbosilane;
step S5: putting the silicon carbide powder containing polycarbosilane into a ball mill, adding polyvinyl alcohol solution and polyacrylic acid for ball milling and mixing, pouring the mixed powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, then performing ball milling and crushing, and sieving with a sieve of 20-100 meshes to obtain granulated powder;
step S6: pouring the granulated powder into a dry pressing forming machine for a mold, pressing and forming under the pressure of 5-100 Mpa, putting into a vacuum electric furnace, heating the furnace to 400 ℃, and keeping the constant temperature for 1-3 hours; and then, raising the furnace temperature to 800-1100 ℃, and keeping the temperature for 1-5 hours at a constant temperature to prepare the silicon carbide porous ceramic product containing the nano silver.
2. The method of claim 1, wherein in step S6, flowing nitrogen is further added during the sintering process, and the nitrogen flows through the porous ceramic article.
3. The method of preparing porous ceramic having nano silver according to claim 2, wherein the silicon carbide raw material is prepared by mixing 50 mesh silicon carbide and 120 mesh silicon carbide at a ratio of 2:1 mass fraction in step S2.
4. The method of claim 3, wherein in step S2, after the nano silver is mixed with the silicon carbide raw material, 0.6% of oleic acid is added, followed by ball milling and mixing.
5. The method of claim 4, wherein in step S5, the polyvinyl alcohol solution is added in an amount of 1-6% by mass and the concentration is 2-8%, and the polyacrylic acid is added in an amount of 1-3% by mass.
6. The method of claim 5, wherein in step S6, the furnace temperature is increased to 400 ℃ at a rate of 3-10 ℃/min, and then maintained at a constant temperature, and then increased to 800-1100 ℃ at a rate of 3-10 ℃/min, and then maintained at a constant temperature.
7. A porous ceramic with nano silver, which is prepared by the method for preparing a porous ceramic with nano silver according to any one of claims 1 to 6.
8. An electronic cigarette atomizing core, characterized in that the electronic cigarette atomizing core is made of the porous ceramic with nano silver described in claim 7.
9. An electronic cigarette comprising the electronic aerosolized core of claim 8.
10. The electronic cigarette of claim 9, further comprising a heating power source electrically connected to the e-cigarette aerosolization core.
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