CN111153686A - Porous ceramic for electronic cigarette, atomizing core containing porous ceramic and preparation method of atomizing core - Google Patents
Porous ceramic for electronic cigarette, atomizing core containing porous ceramic and preparation method of atomizing core Download PDFInfo
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- CN111153686A CN111153686A CN202010037505.0A CN202010037505A CN111153686A CN 111153686 A CN111153686 A CN 111153686A CN 202010037505 A CN202010037505 A CN 202010037505A CN 111153686 A CN111153686 A CN 111153686A
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- porous ceramic
- ceramic
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- green body
- atomizing core
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- 239000000919 ceramic Substances 0.000 title claims abstract description 127
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000003292 glue Substances 0.000 claims abstract description 38
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000008117 stearic acid Substances 0.000 claims abstract description 8
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 7
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000005642 Oleic acid Substances 0.000 claims abstract description 7
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 7
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
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- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
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- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
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- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
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- 239000006260 foam Substances 0.000 claims 2
- 235000019764 Soybean Meal Nutrition 0.000 claims 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 235000012054 meals Nutrition 0.000 claims 1
- 239000004455 soybean meal Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 11
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- 238000013329 compounding Methods 0.000 abstract description 3
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- 238000000889 atomisation Methods 0.000 description 17
- 235000015895 biscuits Nutrition 0.000 description 16
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- 238000000034 method Methods 0.000 description 7
- 238000007650 screen-printing Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 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
- 229910052799 carbon Inorganic materials 0.000 description 3
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- 230000008569 process Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- PCEXQRKSUSSDFT-UHFFFAOYSA-N [Mn].[Mo] Chemical compound [Mn].[Mo] PCEXQRKSUSSDFT-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 235000010675 chips/crisps Nutrition 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- JUWSSMXCCAMYGX-UHFFFAOYSA-N gold platinum Chemical compound [Pt].[Au] JUWSSMXCCAMYGX-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
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- 239000002360 explosive Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
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- 230000000391 smoking effect Effects 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The invention relates to the technical field of electronic cigarettes, in particular to porous ceramic for electronic cigarettes, an atomizing core containing the porous ceramic and a preparation method of the atomizing core, wherein the porous ceramic for electronic cigarettes comprises the following components in percentage by mass: 35-60% of ceramic powder, 5-40% of pore-forming agent, 5-30% of sintering aid and 15-35% of glue, wherein the glue comprises the following components in percentage by mass: 20-40% of PE, 20-40% of PP, 1-10% of PE wax, 15-40% of paraffin wax and 1-10% of stearic acid or oleic acid. By adopting the mode, the porous ceramic with uniform structure and adjustable pore diameter and porosity is prepared by adopting an injection molding process, and the requirements of users on different pore diameters and different porosities of the porous ceramic can be met; make the compounding more even through specific reinforced order and banbury mixer, the shaping size is stable and near net size shaping need not secondary operation, and the shaping is automatic easily, and production efficiency is high, low in production cost.
Description
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to porous ceramic for electronic cigarettes, an atomizing core containing the porous ceramic and a preparation method of the atomizing core.
Background
Tobacco tar type electron cigarette core member is porous ceramic atomizing core, and this atomizing core adopts porous ceramic's microporous structure to store the tobacco tar, adopts the mode of silk screen printing to print heating circuit on ceramic substrate, thereby atomizes the tobacco tar of storage in porous ceramic micropore through heating circuit during the suction and reaches the effect of smoking, and porous ceramic's porosity, intensity, aperture size and distribution play crucial effect to atomization effect, suction taste in the atomizing core.
The main methods for preparing the porous ceramic at present include dry pressing, tape casting, hot press casting and slip casting, and the main difficulties are how to realize the accurate control of the pore size, pore appearance and pore distribution of the porous ceramic, how to improve the porosity, improve the smoke atomization efficiency and how to reduce the cost. The slurry is difficult to be uniformly mixed in the dry pressing, hot injection molding and slip casting processes, and the prepared porous ceramic has poor dimensional stability, low efficiency and unstable performance; the tape casting process is complex and the cost is high.
In view of the above, the technical problems to be solved in the art are to be solved by providing a new porous ceramic for electronic cigarette, an atomizing core containing the porous ceramic and a preparation method thereof.
Disclosure of Invention
The invention aims to provide porous ceramic for electronic cigarettes, an atomizing core containing the porous ceramic and a preparation method of the atomizing core, aiming at the defects in the prior art.
The object of the invention can be achieved by the following technical measures:
the embodiment of the invention provides porous ceramic for an electronic cigarette, which comprises the following components in percentage by mass: 35-60% of ceramic powder, 5-40% of pore-forming agent, 5-30% of sintering aid and 15-35% of glue, wherein the glue comprises the following components in percentage by mass: 20-40% of PE, 20-40% of PP, 1-10% of PE wax, 15-40% of paraffin wax and 1-10% of stearic acid or oleic acid.
According to an embodiment of the present invention, the ceramic powder includes: at least one of diatomaceous earth, cordierite, alumina, silica, silicon carbide, silicon nitride, quartz sand, corundum sand, glass sand, kaolin, and clay.
According to an embodiment of the present invention, the pore-forming agent includes at least one of polystyrene microspheres, polymethyl methacrylate microspheres, polyurethane microspheres, polypropylene microspheres, polyvinyl chloride microspheres, carbon powder, carbonate, nitrate, ammonium salt, wood dust, flour, corn flour, starch, and bean flour.
According to one embodiment of the invention, the pore former has a particle size of 5 to 500 μm.
According to one embodiment of the invention, the sintering aid comprises at least one of glass frit, metal oxide, alkali metal oxide, and transition metal oxide.
The embodiment of the invention also provides a preparation method of the atomization core, the atomization core comprises the porous ceramic for the electronic cigarette, and the preparation method comprises the following steps:
s1: adding the glue, the pore-forming agent, the sintering aid and the ceramic powder into an internal mixer in sequence, and carrying out internal mixing for 2-8 hours at the temperature of 90-200 ℃ to obtain an internal mixed material;
s2: adding the banburying material into an injection machine, and performing injection molding at the temperature of 130-180 ℃ and the pressure of 30-120Mpa to obtain an injection green body;
s3: carrying out glue discharging treatment on the injection green body to obtain a ceramic biscuit;
s4: placing the ceramic biscuit in a sintering furnace for sintering treatment at the temperature of 800-1300 ℃, the heating rate of 3-10 ℃/min and the heat preservation time of 0.1-2 hours to obtain porous ceramic;
s5: and screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in oxygen, reducing gas or inert gas, and sintering at the temperature of 600-1200 ℃ to obtain the porous ceramic atomizing core.
The metal slurry can be any one of nickel slurry, stainless steel slurry, nickel-chromium slurry, titanium alloy slurry, silver slurry, copper slurry, molybdenum-manganese slurry, tungsten slurry and platinum-gold slurry.
According to an embodiment of the present invention, before step S3, the method further includes:
placing the injection green body into a sagger, and scattering embedding powder in the sagger until the injection green body is completely covered by the embedding powder.
According to an embodiment of the invention, in step S3, the saggar and the injection green body are placed into a glue removing furnace together to perform glue removing treatment at a temperature of 400-700 ℃, a heating rate of 0.5-3 ℃/min and a holding time of 0.5-2 hours, so as to obtain the ceramic biscuit.
According to an embodiment of the present invention, before step S3, the method further includes: and (3) carrying out oil soaking treatment on the injection green body, wherein the oil soaking temperature is 40-90 ℃, and the time is 10-48 hours, so as to obtain the oil soaking material.
According to an embodiment of the invention, in step S3, the bubble oil material is placed into a sagger, and the sagger and the bubble oil material are placed into a gel discharging furnace together to perform gel discharging treatment at a temperature of 400-700 ℃, a heating rate of 0.5-3 ℃/min and a heat preservation time of 0.5-2 hours, so as to obtain the ceramic biscuit.
The embodiment of the invention also provides an atomizing core which is prepared by the preparation method, the porous ceramic atomizing core comprises porous ceramic and an electrode wire mesh, the porosity of the porous ceramic is 50-70%, the water absorption rate is 40-80%, and the oil absorption rate is 5-8 mg/S.
The embodiment of the invention adopts the injection molding process to prepare the porous ceramic with uniform structure and adjustable aperture and porosity, and can meet the requirements of users on different apertures and different porosities of the porous ceramic; make the compounding more even through specific reinforced order and banbury mixer, the shaping size is stable and near net size shaping need not secondary operation, and the shaping is automatic easily, and production efficiency is high, low in production cost.
Drawings
Fig. 1 is a schematic flow chart of a method for producing an atomizing core according to a first embodiment of the present invention.
Fig. 2 is a schematic flow chart of a method for producing an atomizing core according to a second embodiment of the present invention.
Fig. 3 is a schematic perspective view of an atomizing core of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to make the description of the present disclosure more complete and complete, the following description is given for illustrative purposes with respect to the embodiments and examples of the present invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.
The embodiment of the invention discloses porous ceramic for electronic cigarettes, which comprises the following components in percentage by mass: 35-60% of ceramic powder, 5-40% of pore-forming agent, 5-30% of sintering aid and 15-35% of glue, wherein the glue comprises the following components in percentage by mass: 20-40% of PE, 20-40% of PP, 1-10% of PE wax, 15-40% of paraffin wax and 1-10% of stearic acid or oleic acid.
Preferably, the porous ceramic for the electronic cigarette comprises the following components in percentage by mass: 40-60% of ceramic powder, 10-20% of pore-forming agent, 5-20% of sintering aid and 20-25% of glue.
Further, the glue is a mixture, the glue comprising: at least one of paraffin wax, PE wax, microcrystalline wax, Fischer-Tropsch wax, beeswax, PE, PP, PVC, stearic acid, and oleic acid. Preferably, the glue comprises the following components in percentage by mass: 30-40% of PE, 25-35% of PP, 2-3% of PE wax, 25-35% of paraffin wax and 2-3% of stearic acid or oleic acid.
Further, the ceramic powder includes: at least one of diatomaceous earth, cordierite, alumina, silica, silicon carbide, silicon nitride, quartz sand, corundum sand, glass sand, kaolin, and clay. Preferably, the ceramic powder includes at least one of diatomite, quartz sand, glass sand, corundum sand, and alumina.
Further, the pore-forming agent comprises at least one of polystyrene microspheres, polymethyl methacrylate microspheres, polyurethane microspheres, polypropylene microspheres, polyvinyl chloride microspheres, carbon powder, carbonate, nitrate, ammonium salt, wood chips, flour, corn flour, starch and bean flour. Preferably, the pore-forming agent is at least one of polystyrene microspheres, carbon powder, flour and wood chips. The pore former has a particle size of 5 to 500. mu.m, preferably, the pore former has a particle size of 50 to 100. mu.m.
Further, the sintering aid includes at least one of glass frit, metal oxide, alkali metal oxide, and transition metal oxide. Preferably, the sintering aid comprises at least one of glass powder with a softening temperature of 500-1000 ℃, potassium oxide, sodium oxide, calcium oxide, silicon oxide, titanium oxide, iron oxide, zinc oxide and copper oxide.
The embodiment of the invention discloses a preparation method of an atomization core, wherein the atomization core comprises the porous ceramic for electronic cigarettes, please refer to fig. 1, and fig. 1 is a schematic flow diagram of the preparation method of the porous ceramic for electronic cigarettes according to the first embodiment of the invention, and the preparation method comprises the following steps:
step S101: according to the formula, the rubber, the pore-forming agent, the sintering aid and the ceramic powder are sequentially added into an internal mixer to be internally mixed for 2-8 hours at the temperature of 90-200 ℃ to obtain an internally mixed material.
In step S101, glue is added in sequence, and after the glue is completely melted, the pore-forming agent and the sintering aid are slowly added to mix the sintering aid and the pore-forming agent uniformly, and then the ceramic powder is added.
Step S102: and adding the banburying material into an injection machine, and performing injection molding at the temperature of 130-180 ℃ and the pressure of 30-120Mpa to obtain an injection green body.
Step S103: and putting the injection green bodies into a sagger, scattering the embedded burning powder in the sagger until the injection green bodies are completely covered by the embedded burning powder, and carrying out glue discharging treatment on the injection green bodies to obtain the ceramic biscuit.
In step S103, the saggar and the injection green body are placed into a glue removing furnace together for glue removing treatment at the temperature of 400-700 ℃, the heating rate of 0.5-3 ℃/min and the heat preservation time of 0.5-2 hours, so as to obtain the ceramic biscuit. Preferably, the temperature is raised at a rate of 0.5 ℃/min to 400 ℃ and at a rate of 1 ℃/min to 400 ℃ and 600 ℃, and the temperature is maintained at 600 ℃ for 0.5 hour.
In this embodiment, the buried sintering powder is alumina, and the buried sintering powder can absorb the glue of the biscuit to prevent the product from deforming.
Step S104: and placing the ceramic biscuit in a sintering furnace for sintering treatment at the temperature of 800-1300 ℃, the heating rate of 3-10 ℃/min and the heat preservation time of 0.1-2 hours to obtain the porous ceramic.
In step S104, preferably, the temperature is maintained at the sintering temperature for 2 hours at room temperature to 800 ℃ at a heating rate of 10 ℃/min to 800 ℃ to the sintering temperature at a heating rate of 3 ℃/min.
Step S105: and (2) screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in oxygen, reducing gas or inert gas, and sintering at the temperature of 600-1200 ℃ to obtain the porous ceramic atomizing core.
In step S105, the metal paste includes any one of nickel paste, stainless steel paste, nickel-chromium paste, titanium alloy paste, silver paste, copper paste, molybdenum-manganese paste, tungsten paste, and platinum-gold paste. Preferably, the metal slurry is a nickel slurry. In the present embodiment, the secondary sintering of the electrode mesh and the porous ceramic is mainly to sinter the metal electrode slurry, and the sintering atmosphere is preferably a reducing atmosphere.
Referring to fig. 2, fig. 2 is a schematic flow chart of a preparation method of a porous ceramic for electronic cigarette according to a second embodiment of the present invention, where the preparation method includes:
step S201: according to the formula, the rubber, the pore-forming agent, the sintering aid and the ceramic powder are sequentially added into an internal mixer to be internally mixed for 2-8 hours at the temperature of 90-200 ℃ to obtain an internally mixed material.
In this embodiment, step S201 of fig. 2 is similar to step S101 of fig. 1, and for brevity, is not described herein again.
Step S202: and adding the banburying material into an injection machine, and performing injection molding at the temperature of 130-180 ℃ and the pressure of 30-120Mpa to obtain an injection green body.
In this embodiment, step S202 of fig. 2 is similar to step S102 of fig. 1, and for brevity, is not described herein again.
Step S203: and (3) carrying out oil soaking treatment on the injection green body, wherein the oil soaking temperature is 40-90 ℃, and the time is 10-48 hours, so as to obtain the oil soaking material.
In step S203, the solvent of the bubble oil is one or more of hydrocarbon, kerosene or gasoline, preferably gasoline, and in this step, the residual paraffin components in the injection green body can be extracted, and a channel is left, so that the glue can be discharged from the channel during subsequent glue discharging, thereby avoiding the problems of cracking, shape and the like of the product.
Step S204: and putting the soaked oil material into a sagger, and putting the sagger and the soaked oil material into a glue discharging furnace together for glue discharging treatment at the temperature of 400-700 ℃, the heating rate of 0.5-3 ℃/min and the heat preservation time of 0.5-2 hours to obtain the ceramic biscuit.
In step S204, preferably, the temperature is maintained at 700 ℃ for 0.5 hour at room temperature to 400 ℃ at a heating rate of 1 ℃/min and 400 ℃ to 700 ℃ at a heating rate of 3 ℃/min.
Step S205: and placing the ceramic biscuit in a sintering furnace for sintering treatment at the temperature of 800-1300 ℃, the heating rate of 3-10 ℃/min and the heat preservation time of 0.1-2 hours to obtain the porous ceramic.
In this embodiment, step S205 of fig. 2 is similar to step S104 of fig. 1, and for brevity, is not described herein again.
Step S206: and (2) screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in oxygen, reducing gas or inert gas, and sintering at the temperature of 600-1200 ℃ to obtain the porous ceramic atomizing core.
In this embodiment, step S206 of fig. 2 is similar to step S105 of fig. 1, and for brevity, is not described herein again.
According to the preparation method of the porous ceramic for the electronic cigarette, disclosed by the embodiment one and the embodiment two, the porous ceramic with a uniform structure and adjustable pore size and porosity is prepared through an injection molding process, and the requirements of users on different pore sizes and different porosities of the porous ceramic can be met; make the compounding more even through specific reinforced order and banbury mixer, the shaping size is stable and near net size shaping need not secondary operation, and the shaping is automatic easily, and production efficiency is high, low in production cost. Compared with the preparation method of the second embodiment, the preparation method of the second embodiment does not need oil soaking treatment, has higher safety in the production process, and has insecurity in oil soaking treatment because the used oil belongs to flammable and explosive chemicals; compared with the preparation method of the first embodiment, the second embodiment has no hole blocking phenomenon of a powder embedding process, the product is clean and does not fall off powder, and a glue discharging channel is reserved after oil is soaked in the injection green body, so that the glue discharging is not easy to deform and crack.
The embodiment of the invention discloses an atomizing core which is prepared by adopting the preparation method, please refer to fig. 3, the porous ceramic atomizing core 10 comprises porous ceramic 11 and an electrode wire mesh 12, the porosity of the porous ceramic 11 is 50-70%, the water absorption is 40-80%, and the oil absorption rate is 5-8 mg/S. This porous ceramic atomizing core 10 can fully adsorb the tobacco tar and atomize, has promoted tobacco tar atomization rate greatly, has improved smog volume, has solved the not good, the poor problem of taste of tobacco tar atomization effect in the existing market.
Example 1
Respectively weighing 30% of diatomite, 30% of quartz sand, 10% of polystyrene microspheres, 5% of glass powder and 25% of glue according to the mass percentage, wherein the softening temperature of the glass powder is 950-1200 ℃, the particle size of the polystyrene microspheres is 100 mu m, and the glue comprises the following components in mass percentage: 40% PE, 30% PP, 3% PE wax, 25% paraffin wax, 2% stearic acid.
S1: according to the formula, the rubber, the polystyrene microspheres, the glass powder, the diatomite and the quartz sand are sequentially added into an internal mixer to be internally mixed for 3 hours at the temperature of 180 ℃, and the internally mixed material is obtained.
Step S2: and adding the internal mixing material into an injection machine, and performing injection molding at the temperature of 180-130 ℃ and the pressure of 30-120Mpa for 3S to obtain an injection green body.
Step S3: putting the injection green body into a sagger, scattering the embedded burning powder in the sagger until the injection green body is completely covered by the embedded burning powder, putting the sagger and the injection green body into a glue discharging furnace, heating at the room temperature of 400 ℃, the heating rate of 0.5 ℃/min, 400 plus material temperature of 600 ℃, the heating rate of 1 ℃/min, and keeping the temperature at 600 ℃ for 0.5 hour to obtain the ceramic biscuit.
Step S4: and placing the ceramic biscuit in a sintering furnace, heating at the room temperature of 600 ℃, the heating rate of 10 ℃/min, 600-1100 ℃, the heating rate of 3 ℃/min, and keeping the temperature at 1100 ℃ for 2 hours to obtain the porous ceramic.
Step S5: and (2) screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in reducing gas, and sintering at 1050 ℃ to obtain a porous ceramic atomization core, wherein the porosity of the porous ceramic atomization core is 64%, the absorption rate is 71%, and the oil absorption rate is 7.2 mg/S.
Example 2
Respectively weighing 19% of diatomite, 38% of corundum, 15% of carbon powder, 8% of glass powder and 20% of glue according to the mass percentage, wherein the softening temperature of the glass powder is 950-1200 ℃, the particle size of the carbon powder is 50 mu m, and the glue comprises the following components in percentage by mass: 33% PE, 32% PP, 2% PE wax, 30% paraffin, 3% oleic acid.
S1: according to the formula, the rubber, the carbon powder, the glass powder, the diatomite and the corundum sand are sequentially added into an internal mixer to be internally mixed for 3 hours at the temperature of 180 ℃, and the internally mixed material is obtained.
Step S2: and adding the internal mixing material into an injection machine, and performing injection molding at the temperature of 180-130 ℃ and the pressure of 30-120Mpa for 3S to obtain an injection green body.
Step S3: putting the injection green body into a sagger, scattering the embedded burning powder in the sagger until the injection green body is completely covered by the embedded burning powder, putting the sagger and the injection green body into a glue discharging furnace, heating at the room temperature of 400 ℃, the heating rate of 0.5 ℃/min, 400 plus material temperature of 600 ℃, the heating rate of 1 ℃/min, and keeping the temperature at 600 ℃ for 0.5 hour to obtain the ceramic biscuit.
Step S4: and placing the ceramic biscuit in a sintering furnace, heating at the room temperature of 600 ℃, the heating rate of 10 ℃/min, 600-1100 ℃, the heating rate of 3 ℃/min, and keeping the temperature at 1100 ℃ for 2 hours to obtain the porous ceramic.
Step S5: and (2) screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in a reducing gas, and sintering at the temperature of 1100 ℃ to obtain a porous ceramic atomization core, wherein the porosity of the porous ceramic atomization core is 53%, the absorption rate is 41%, and the oil absorption rate is 5.3 mg/S.
Example 3
Respectively weighing 18% of diatomite, 30% of quartz sand, 20% of flour, 10% of glass powder and 22% of glue according to the mass percentage, wherein the softening temperature of the glass powder is 950-1200 ℃, the particle size of the flour is 50 mu m, and the glue comprises the following components in percentage by mass: 32% PE, 28% PP, 3% PE wax, 35% paraffin wax, 2% stearic acid.
S1: according to the formula, the rubber, the carbon powder, the glass powder, the diatomite and the corundum sand are sequentially added into an internal mixer to be internally mixed for 3 hours at the temperature of 180 ℃, and the internally mixed material is obtained.
Step S2: and adding the internal mixing material into an injection machine, and performing injection molding at the temperature of 180-150 ℃ and the pressure of 30-120Mpa for 3S to obtain an injection green body.
Step S3: and soaking the injection green body in gasoline at 60 ℃ for 24 hours to obtain the foaming oil material.
Step S4: putting the oil soaking material into a sagger, putting the sagger and the oil soaking material into a glue discharging furnace, and keeping the temperature at the room temperature of 400 ℃, the heating rate of 1 ℃/min, 400-700 ℃, the heating rate of 3 ℃/min and 700 ℃ for 0.5 hour to obtain the ceramic biscuit.
Step S5: placing the ceramic biscuit in a sintering furnace, heating at the temperature of between room temperature and 700 ℃, at the heating rate of 10 ℃/min and 700-1150 ℃, at the heating rate of 3 ℃/min, and keeping the temperature at 1150 ℃ for 2 hours to obtain the porous ceramic.
Step S6: and (2) screen-printing metal slurry on the porous ceramic according to a preset electrode to obtain an electrode screen, placing the electrode screen and the porous ceramic in a sintering furnace in a reducing gas, and sintering at the temperature of 10200 ℃ to obtain a porous ceramic atomizing core, wherein the porosity of the porous ceramic atomizing core is 64%, the absorption rate is 59%, and the oil absorption rate is 6.1 mg/S.
In this example, the following tests were performed on the porous ceramics for electronic cigarette prepared in examples 1 to 3:
porosity: and testing the obtained product by adopting a porosity tester special for the porous ceramic.
Water absorption: and testing the obtained product by adopting a porosity tester special for the porous ceramic.
Oil absorption rate: fixing a tobacco tar (such as propylene glycol and glycerol of 5:5), dropping a drop of tobacco tar on the surface of the porous ceramic atomizing core by using a suction pipe, recording the weight of the porous ceramic atomizing core before and after oil absorption (the difference between the mass of the porous ceramic atomizing core before and after oil absorption) and the time for completely absorbing the drop of tobacco tar, wherein the amount of the tobacco tar absorbed in unit time is the oil absorption rate.
Table 1 shows a table corresponding to the porosity, water absorption, oil absorption rate, and the type and content of pore-forming agent added, of the porous ceramic for electronic cigarette oil obtained in examples 1 to 3.
| Examples | Kind of pore-forming agent | Pore former content/%) | Porosity/% | Water absorption/%) | Oil absorption Rate/mg/S |
| 1 | |
10 | 64 | 71 | 7.2 |
| 2 | Carbon powder | 15 | 53 | 41 | 5.3 |
| 3 | Flour | 20 | 64 | 59 | 6.1 |
As can be seen from Table 1, the porosity of the porous ceramic obtained by adjusting the contents of different pore-forming agents can reach 53-764%, the water absorption can reach 41-71%, and the oil absorption rate can reach 5.3-7.2mg/S, which indicates that the porous ceramic obtained by the preparation method can meet the requirements of the porosity, the oil storage capacity and the smoke atomization efficiency for manufacturing the atomization core; the porous ceramic atomizing core prepared in the above mode can adjust the porosity, the water absorption rate and the oil absorption rate of the porous ceramic according to the taste and the tobacco tar characteristics of a user, so that the tobacco tar can be fully adsorbed for atomization, the tobacco tar atomization rate is greatly improved, the smoke amount is increased, and the problems of poor tobacco tar atomization effect and poor taste in the current market are solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037505.0A CN111153686A (en) | 2020-01-14 | 2020-01-14 | Porous ceramic for electronic cigarette, atomizing core containing porous ceramic and preparation method of atomizing core |
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