CN109053219A - A kind of preparation method of porous alumina ceramic - Google Patents
A kind of preparation method of porous alumina ceramic Download PDFInfo
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- CN109053219A CN109053219A CN201811226297.8A CN201811226297A CN109053219A CN 109053219 A CN109053219 A CN 109053219A CN 201811226297 A CN201811226297 A CN 201811226297A CN 109053219 A CN109053219 A CN 109053219A
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- Prior art keywords
- polyurethane foam
- porous alumina
- ceramic
- alumina ceramic
- slurry
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 20
- 239000011496 polyurethane foam Substances 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000008236 heating water Substances 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims 1
- 229940047670 sodium acrylate Drugs 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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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
- C04B38/067—Macromolecular compounds
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/10—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 aluminium oxide
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/638—Removal thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention provides a kind of preparation method of porous alumina ceramic, it is feasible, at low cost to have the advantages that simple process operates, the porous alumina ceramic prepared has excellent linear shrinkage ratio, compression strength, bending strength.Compared with prior art, the ceramic phase obtained by the present invention in porous alumina ceramic is using special space three-dimensional structure as supporter, and due to the presence of ceramic phase, so that composite material has many advantages, such as that light weight, specific strength height, heat-resistant antifriction are good.
Description
Technical field
The present invention relates to a kind of ceramic material and arts, the preparation method of specifically a kind of porous alumina ceramic.
Background technique
With the development of the industries such as integrated circuit, electrical contact, brake material, the comprehensive performance of material also proposed more
Harsh requirement: not only having required the high intensity of ceramic material, wearability and corrosion resistance, but also to require metal material good
Thermal conductivity and excellent machining property.
Summary of the invention
The present invention is provided and a kind of prepares high heat-resistant and wear-resistant to solve above-mentioned existing deficiencies in the technology
Property, the method for light weight, high specific strength porous alumina ceramic.
A kind of preparation method of porous alumina ceramic, which comprises the following steps:
1) skeleton of the polyurethane foam as dipping sizing agent is chosen, various required shapes is cut into foam cutting machine, is put into
Concentration is the sodium hydroxide solution of 20wt.%-30wt.%, and heating water bath 4-5h, is rubbed repeatedly at 70-80 DEG C, removes poly- ammonia
Impurity on ester foam, finally takes out polyurethane foam, is rinsed with deionized water, dries spare；
2) it weighs suitable Sodium Polyacrylate powder to be added in suitable deionized water, 1h is stirred on magnetic stirrer,
After Sodium Polyacrylate is uniformly dispersed, a certain amount of carboxymethyl cellulose is added and stirs evenly, with a certain amount of alumina powder
It is put into togerther in ball grinder, for 24 hours, ceramic slurry is made, wherein rotational speed of ball-mill 300-400rpm in ball milling；
3) polyurethane foam in step 1) is immersed in the ceramic slurry in step 2), repeatedly extruded and rubbed
It is even, it is put into centrifugal slurry-wobbling machine and excludes extra slurry, polyurethane foam ceramics are made, then, polyurethane foam ceramics are placed
It dries at room temperature, finally, repeating above-mentioned dipping 2-5 times；
4) it by after polyurethane foam ceramic low-temp dumping, is put into high temperature sintering furnace and is sintered, porous aluminas pottery is made
Porcelain.
Further, the solid concentration of slurry is 20vol.%-35vol.% in step 2).
Further, the technique being sintered in step 4) are as follows: the heating rate of 1 DEG C/min rises to 200- through 200-400min
400 DEG C, 1-2h is then kept the temperature, then rise to 600-800 DEG C through 100-200min with the heating rate of 2 DEG C/min, keep the temperature 1-2h, with
1-2h is kept the temperature after rising to 1300-1600 DEG C afterwards with the heating rate of 5 DEG C/min, finally cools to room temperature with the furnace.
Compared with prior art, the ceramic phase in porous alumina ceramic obtained by the present invention is with special space three-dimensional knot
Structure is as supporter, and due to the presence of ceramic phase, so that composite material has, light weight, specific strength be high, heat-resistant antifriction
The advantages that good.In addition, porous alumina ceramic preparation method of the present invention, process flow is simple, at low cost, using the technique of optimization
Parameter, the porous alumina ceramic prepared have excellent linear shrinkage ratio, compression strength, bending strength.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described below with reference to embodiment, still
It should be appreciated that these descriptions are only further explanation the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
Embodiment one
A kind of preparation method of porous alumina ceramic, which comprises the following steps:
1) skeleton of the polyurethane foam as dipping sizing agent is chosen, various required shapes is cut into foam cutting machine, is put into
Concentration is the sodium hydroxide solution of 20wt.%, and heating water bath 5h, is rubbed repeatedly at 70 DEG C, is removed miscellaneous in polyurethane foam
Matter finally takes out polyurethane foam, is rinsed with deionized water, dries spare；
2) it weighs suitable Sodium Polyacrylate powder to be added in suitable deionized water, 1h is stirred on magnetic stirrer,
After Sodium Polyacrylate is uniformly dispersed, a certain amount of carboxymethyl cellulose is added and stirs evenly, with a certain amount of alumina powder
It is put into togerther in ball grinder, for 24 hours, ceramic slurry is made, wherein rotational speed of ball-mill 300rpm, Sodium Polyacrylate, carboxylic first in ball milling
Base cellulose, aluminium oxide, water quality proportioning be 1:2:25:72, the solid concentration of slurry is 25vol.%；
3 are immersed in the polyurethane foam in step 1) in the ceramic slurry in step 2), repeatedly extrude and rub uniformly,
It is put into centrifugal slurry-wobbling machine and excludes extra slurry, polyurethane foam ceramics are made, then, polyurethane foam ceramics are placed on room
It is dry under the conditions of temperature, finally, repeating above-mentioned dipping 3 times；
4) it by after polyurethane foam ceramic low-temp dumping, is put into high temperature sintering furnace and is sintered, porous aluminas pottery is made
Porcelain, wherein sintering process are as follows: the heating rate of 1 DEG C/min rises to 400 DEG C through 400min, keeps the temperature 1h, then then with 2 DEG C/min
Heating rate rise to 600 DEG C through 200min, keep the temperature 1h, keep the temperature 2h after then rising to 1550 DEG C with the heating rate of 5 DEG C/min,
Finally cool to room temperature with the furnace.
The porous alumina ceramic prepared is tested for the property, it is as follows to obtain result: 75% porosity,
266.77w/mk thermal coefficient, 0.02mm3The compression strength of the wear rate of/mN, 1MPa.
Claims (3)
1. a kind of preparation method of porous alumina ceramic, which comprises the following steps:
1) skeleton of the polyurethane foam as dipping sizing agent is chosen, various required shapes is cut into foam cutting machine, is put into concentration
For the sodium hydroxide solution of 20wt.%-30wt.%, heating water bath 4-5h, is rubbed repeatedly at 70-80 DEG C, removes polyurethane foam
Impurity on foam, finally takes out polyurethane foam, is rinsed with deionized water, dries spare；
2) it weighs suitable Sodium Polyacrylate powder to be added in suitable deionized water, 1h is stirred on magnetic stirrer, to poly-
After sodium acrylate is uniformly dispersed, a certain amount of carboxymethyl cellulose is added and stirs evenly, together with a certain amount of alumina powder
It is put into ball grinder, for 24 hours, ceramic slurry is made, wherein rotational speed of ball-mill 300-400rpm in ball milling；
3) polyurethane foam in step 1) is immersed in the ceramic slurry in step 2), repeatedly extruded and rubbed uniformly, put
Enter centrifugal slurry-wobbling machine and exclude extra slurry, polyurethane foam ceramics are made, then, polyurethane foam ceramics are placed on room temperature
Under the conditions of it is dry, finally, repeating above-mentioned dipping 2-5 times；
4) it by after polyurethane foam ceramic low-temp dumping, is put into high temperature sintering furnace and is sintered, porous alumina ceramic is made.
2. a kind of preparation method of porous alumina ceramic according to claim 1, it is characterised in that: in the step 2)
The solid concentration of slurry is 20vol.%-35vol.%.
3. a kind of preparation method of porous alumina ceramic according to claim 1, the middle technique being sintered of the step 4)
Are as follows: 200-400 DEG C is risen to through 200-400min with the heating rate of 1 DEG C/min, keeps the temperature 1-2h, then then with the liter of 2 DEG C/min
Warm rate rises to 600-800 DEG C through 100-200min, keeps the temperature 1-2h, then rises to 1300-1600 with the heating rate of 5 DEG C/min
1-2h is kept the temperature after DEG C, finally cools to room temperature with the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226297.8A CN109053219A (en) | 2018-10-18 | 2018-10-18 | A kind of preparation method of porous alumina ceramic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811226297.8A CN109053219A (en) | 2018-10-18 | 2018-10-18 | A kind of preparation method of porous alumina ceramic |
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| CN109053219A true CN109053219A (en) | 2018-12-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809806A (en) * | 2019-03-27 | 2019-05-28 | 中国科学院兰州化学物理研究所 | A kind of preparation method of inorganic three-dimensional skeleton foam material |
| CN109896836A (en) * | 2019-04-19 | 2019-06-18 | 西安石油大学 | A kind of preparation method of kaolin/composite diatomite porous ceramics |
| CN118388259A (en) * | 2024-04-23 | 2024-07-26 | 成都诚科晶陶新材料科技有限公司 | A rapid degreasing method for ceramic injection molding blanks |
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| WO2011018568A1 (en) * | 2009-08-10 | 2011-02-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for producing a ceramic foam having reinforced mechanical strength for use as a substrate for a catalyst bed |
| CN105714156A (en) * | 2016-03-21 | 2016-06-29 | 长安大学 | A method for preparing three-dimensional interpenetrating Al2O3/Al composite materials by in-situ reaction |
| CN107399989A (en) * | 2017-08-22 | 2017-11-28 | 东北大学 | A kind of preparation method for strengthening Oxidation of SiC aluminium composite foamed ceramic |
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- 2018-10-18 CN CN201811226297.8A patent/CN109053219A/en active Pending
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| WO2011018568A1 (en) * | 2009-08-10 | 2011-02-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for producing a ceramic foam having reinforced mechanical strength for use as a substrate for a catalyst bed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809806A (en) * | 2019-03-27 | 2019-05-28 | 中国科学院兰州化学物理研究所 | A kind of preparation method of inorganic three-dimensional skeleton foam material |
| CN109896836A (en) * | 2019-04-19 | 2019-06-18 | 西安石油大学 | A kind of preparation method of kaolin/composite diatomite porous ceramics |
| CN118388259A (en) * | 2024-04-23 | 2024-07-26 | 成都诚科晶陶新材料科技有限公司 | A rapid degreasing method for ceramic injection molding blanks |
| CN118388259B (en) * | 2024-04-23 | 2024-12-13 | 成都晶煜智芯材料科技有限公司 | Rapid degreasing method for ceramic injection molding blank |
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Application publication date: 20181221 |
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