CN1257133C - Method for preparing Al#-[2]O#-[3] porous ceramic with high strength and high heat stability - Google Patents
Method for preparing Al#-[2]O#-[3] porous ceramic with high strength and high heat stability Download PDFInfo
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- CN1257133C CN1257133C CN 200310114508 CN200310114508A CN1257133C CN 1257133 C CN1257133 C CN 1257133C CN 200310114508 CN200310114508 CN 200310114508 CN 200310114508 A CN200310114508 A CN 200310114508A CN 1257133 C CN1257133 C CN 1257133C
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Abstract
The present invention relates to a method for preparing Al2O3 porous ceramics with high strength, high-heat stability. The method of the present invention comprises the processes of slurry preparation, slurry injection formation and calcination. The present invention is characterized in that according to the mass percentage, 70 to 80 wt% of alumina powder, 10 to 15 wt% of clay soil, 4 to 19 wt% of high temperature anchoring agent and 0.5 to 1 wt% of slurry additive are mixed with water; the mixture is ground in a ball mill to be prepared into slurry; then, 1 to 10 wt% of short cut polycrystalline Al2O3 ceramic fiber, 7 to 15 wt% of pore boosting agent and 0.5 to 1 wt% of dispergator are added to be stirred and uniformly mixed; slurry is injected in moulds to be formed and is calcined at high temperature finally, wherein the addition quantity of the short cut polycrystalline Al2O3 ceramic fiber and the pore boosting agent can be changed according to products with different strength properties and pore diameter requirements. The preparation method of the present invention has the advantages of simple technology, convenient operation, high productive efficiency and high rate of finished products in production, and is especially suitable for industrial mass production; compared with traditional products, the intensity of prepared products is greatly enhanced, and the thermal shock resistance is obviously improved; the present invention is suitable for preparing ceramic filtering elements used by high temperature coal (smoke) gas filtering devices.
Description
Affiliated technical field
The present invention relates to a kind of Al
2O
3The preparation method of porous ceramics belongs to porous ceramics fabricating technology field.
Background technology
The technology of preparing of traditional alumina porous ceramic filtering element, be on ceramic matrix, to produce the hole, and often improve the voidage of element with the firing temperature that reduces base substrate, performances such as the voidage of alumina porous ceramic and intensity are conflicting all the time, often attend to one thing and lose sight of another on producing and using, particularly the goods of traditional production technique are difficult to satisfy the alumina porous ceramic filtering element at the filtering performance requriements of high-temperature flue gas.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned defective, can prepare high-strength, high thermal stability, the ratio of performance to price rationally, be suitable for the filtering porous ceramics production technology of high-temperature flue gas.Its technical scheme is:
Comprise slurrying, injection forming and burn till, it is characterized in that: with alumina powder jointed 70～80wt%, clay 10～15wt%, by spodumene and ripe talcum by 2～18: bond 4～19wt%, mud additive 0.5～1wt% that 1～2 quality proportioning forms mix with water, in ball mill, grind and be prepared into mud, add in addition then chopped polymorph A l
2O
3Ceramic fibre 1～10wt%, pore forming agent 7～15wt%, degumming agent 0.5～1wt% mix, wherein chopped polymorph A l
2O
3Ceramic fibre diameter 4～5 μ m, its draw ratio is in 1000: 1～2000: 1 scope, and injection forming in model burns till at last again.
For achieving the above object, described Al
2O
3The preparation method of porous ceramics, polymorph A l
2O
3Al in the ceramic fibre
2O
3Content＞72%, Al
2O
3+ SiO
2〉=97.5%, refractoriness 〉=1600 ℃.
For achieving the above object, described Al
2O
3The preparation method of porous ceramics, alumina powder jointed employing commercial alumina powder, its Al
2O
3Content 99%, each quality proportioning that forms is Datong District's soil in the clay: Jiexiu soil: lane soil equals 5～8: 4～6: 1, and mud additive adopts sodium carbonate, and degumming agent adopts citric acid, consisting of of pore forming agent: charcoal powder 60～80wt%, cellulose 20～40wt%.
Respectively consist of in the injection forming base substrate according to the preparation of this filling forming method: chopped polymorph A l
2O
3Ceramic fibre 1～10wt%, pore forming agent 7～15wt%, dry mud 75～92wt%.
The present invention compared with prior art, with polycrystalline alumina ceramic fiber and alumina-based ceramic composite methods, prepare high-strength, high thermal stability, the ratio of performance to price rationally, be applicable to high temperature coal (cigarette) air filter ceramic filter element, technology is simple, and is easy to operate, the production efficiency height, the rate that manufactures a finished product height, the special big production of suitability for industrialized, the product strength that makes increases substantially than traditional product, and thermal shock resistance obtains significantly to improve.
Embodiment
Embodiment 1
The first step prepares mud: commercial alumina powder (75 μ m) 70wt%, Jiexiu soil 8wt%, the soil 6wt% of Datong District, lane soil 1wt%, triphane 12wt%, ripe talcum 2wt%, yellow soda ash 1wt% are mixed with water, in ball mill, ground 48 hours, be prepared into mud, moil fineness 30 μ m go out to grind stand-by then.
Second step prepares chopped polymorph A l
2O
3Ceramic fibre: polymorph A l
2O
3Ceramic fibre prescinds by 1000: 1,1500: 1,2000: 1 draw ratio respectively on chopping machine, and mixes in 50%, 30%, 20% ratio, and machinery is pre-dispersed, stand-by.
The 3rd step injection forming: will add in addition chopped polymorph A l in the above-mentioned mud that makes
2O
3Ceramic fibre 2wt%, pore forming agent 8wt%, citric acid 1wt% stir and are mixed, vacuumize, injection forming in model places the injection forming base substrate in drying baker or the drying kiln then again, under 60～100 ℃ of temperature, the condition of 3～6 hours time, dry base substrate, base substrate moisture≤1%.Wherein the composition of used pore forming agent is: mean particle size is at the wood charcoal powder 60wt% of 30～60 μ m, Mierocrystalline cellulose 40wt%.
The 4th step filter element burns till: the base substrate after will drying burns till under 1300～1350 ℃, 1～2 hour condition, obtains polymorph A l of the present invention
2O
3Ceramic fibre strengthens the alumina porous ceramic filter element.
Through check, the technical indicator of the product that makes is: average intensity 28MPa, average void content 41%, aperture are respectively 5 μ m.
Embodiment 2:
Commercial alumina powder (75 μ m) 75wt%, Jiexiu soil 7wt%, the soil 6wt% of Datong District, lane soil 1wt%, triphane wt8%; Ripe talcum 2wt%, yellow soda ash 1wt%.
Embodiment 3:
Commercial alumina powder (75 μ m) 80wt%, Jiexiu soil 6wt%, the soil 4wt% of Datong District, lane soil 1wt%, triphane 6wt%; Ripe talcum 2wt%, yellow soda ash 1wt%.
The preparation technology of embodiment 2,3 is substantially with embodiment 1, and the products obtained therefrom aperture is respectively 3 μ m, 1 μ m.
Claims (6)
1, a kind of Al
2O
3The preparation method of porous ceramics, comprise slurrying, injection forming and burn till, it is characterized in that: with alumina powder jointed 70～80wt%, clay 10～15wt%, by spodumene and ripe talcum by 2～18: bond 4～19wt%, mud additive 0.5～1wt% that 1～2 quality proportioning forms mix with water, in ball mill, grind and be prepared into mud, add in addition then chopped polymorph A l
2O
3Ceramic fibre 1～10wt%, pore forming agent 7～15wt%, degumming agent 0.5～1wt% mix, wherein chopped polymorph A l
2O
3Ceramic fibre diameter 4～5 μ m, its draw ratio is in 1000: 1～2000: 1 scope, and injection forming in model burns till at last again.
2, Al as claimed in claim 1
2O
3The preparation method of porous ceramics is characterized in that: polymorph A l
2O
3Al in the ceramic fibre
2O
3Content＞72%, Al
2O
3+ SiO
2〉=97.5%, refractoriness 〉=1600 ℃.
3, Al as claimed in claim 1
2O
3The preparation method of porous ceramics is characterized in that: alumina powder jointed employing commercial alumina powder, its Al
2O
3Content 99%.
4, Al as described in claim 1
2O
3The preparation method of porous ceramics is characterized in that: each quality proportioning that forms is Datong District's soil in the clay: Jiexiu soil: lane soil equals 5～8: 4～6: 1.
5, Al as described in claim 1
2O
3The preparation method of porous ceramics is characterized in that: mud additive adopts sodium carbonate, and degumming agent adopts citric acid.
6, Al as described in claim 1
2O
3The preparation method of porous ceramics is characterized in that: pore forming agent consists of: charcoal powder 60～80wt%, cellulose 20～40wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310114508 CN1257133C (en) | 2003-12-18 | 2003-12-18 | Method for preparing Al#-[2]O#-[3] porous ceramic with high strength and high heat stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310114508 CN1257133C (en) | 2003-12-18 | 2003-12-18 | Method for preparing Al#-[2]O#-[3] porous ceramic with high strength and high heat stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1629102A CN1629102A (en) | 2005-06-22 |
| CN1257133C true CN1257133C (en) | 2006-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310114508 Expired - Fee Related CN1257133C (en) | 2003-12-18 | 2003-12-18 | Method for preparing Al#-[2]O#-[3] porous ceramic with high strength and high heat stability |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348537C (en) * | 2006-06-21 | 2007-11-14 | 济南大学 | Fiber reinforced alumina ceramic-base composites and method for preparing same |
| CN101412619B (en) * | 2008-11-12 | 2013-04-17 | 李海峰 | Micropore hydrogenated aluminum porcelain tube and preparation thereof |
| CN102249651A (en) * | 2011-05-12 | 2011-11-23 | 李海峰 | Formula and preparation method of easily-polished aluminum oxide ceramic part |
| CN102746022B (en) * | 2011-12-29 | 2013-12-04 | 西安建筑科技大学 | Preparation method for Al2O3 ceramic material having controllable bimodal porous structure |
| CN103342544A (en) * | 2013-07-03 | 2013-10-09 | 镇江市江南矿山机电设备有限公司 | Method for preparing porous alumina ceramic |
| CN103396094B (en) * | 2013-08-07 | 2014-09-17 | 福建省德化永惠尔红壤土陶艺有限公司 | Special clay and manufacturing method thereof |
| CN106493829A (en) * | 2016-06-03 | 2017-03-15 | 北京晶朗光电科技有限公司 | A kind of method of monoblock type one-shot forming abnormal shape translucent ceramic lamp vessel |
| CN110668797A (en) * | 2019-11-04 | 2020-01-10 | 江西九岭新能源有限公司 | Filtering ceramic carrier and preparation method thereof |
| CN112457006A (en) * | 2020-12-20 | 2021-03-09 | 长沙县新光特种陶瓷有限公司 | Preparation process of zirconium silicate ball filler |
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2003
- 2003-12-18 CN CN 200310114508 patent/CN1257133C/en not_active Expired - Fee Related
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|---|---|
| CN1629102A (en) | 2005-06-22 |
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