CN1256457C - Method for mfg. Al2O3\W composite meterial - Google Patents
Method for mfg. Al2O3\W composite meterial Download PDFInfo
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- CN1256457C CN1256457C CN 02115498 CN02115498A CN1256457C CN 1256457 C CN1256457 C CN 1256457C CN 02115498 CN02115498 CN 02115498 CN 02115498 A CN02115498 A CN 02115498A CN 1256457 C CN1256457 C CN 1256457C
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- sintering
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- powder
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Abstract
The present invention relates to a method for producing fire-resistant materials. The present invention has the technical scheme that firstly, 30 to 80% of tungstic oxide powder, 20 to 50% of metallic aluminium powder and 0 to 60% of corundum are mixed; secondly, cold press moulding is carried out for the mixed powder; finally, pressureless sintering or hot pressed sintering is carried out, the sintering temperature is from 900 to 1900 DEG C, the sintering holding time is from 0.5 to 5 hours, and the sintering atmosphere adopts a carbon buried reducing atmosphere, or an argon atmosphere or a vacuum atmosphere. The present invention has the characteristics of low calcining temperature, low cost and simple manufacturing process; prepared composite materials have favorable heat conductivity and favorable thermal shock stability.
Description
One, technical field
The invention belongs to the ceramic composition field, relate in particular to a kind of production method of refractory materials.
Two, background technology
At present, preparation Al
2O
3The method of/W matrix material has three kinds, first kind of (Huang Qiliang, Pan Wei, Al
2O
3/ W stratified composite performance and Study on Microstructure, Guangxi University for Nationalities's journal, Vol.4, No.4,1999) be that hot pressed sintering makes with centrifugal grouting method of forming film forming, the preparation method is comparatively complicated; Second kind is raw material with metal tungsten powder and aluminum oxide fine powder, adopts powder metallurgy process to make; The third (Sekino, T, Nakahira, A, Niihara, K, Nawa, M, Fabricatlon of Al
2O
3/ Tungsten Nanocomposites, Kona (Japan), No.10, Pg.192-197,1992) be to be raw material reduction-oxidation tungsten under hydrogen with Tungsten oxide 99.999 and aluminum oxide powder, sintering under argon gas or in the vacuum then.Second and third kind method not only step complexity, condition harshness, calcining temperature height, cost height and thermal conductivity and thermal shock resistance and resistance to fouling is poor.
Three, summary of the invention
The purpose of this invention is to provide a kind of Al that good thermal conductivity, thermal shock resistance, resistance to fouling and cost are low, technology is simple, calcining temperature is low that has
2O
3The manufacture method of/W matrix material.
For achieving the above object, the technical solution adopted in the present invention is: metallic aluminium powder, corundum, oxidation tungsten powder are mixed moulding, sintering.Percentage composition by weight, the oxidation tungsten powder is 30～80%, and metallic aluminium powder is 20～50%, and corundum is 0～60%.
In above-mentioned powder mix, the median size of Tungsten oxide 99.999 is 1～200 μ m, and the median size of metallic aluminium powder is 1～200 μ m, and the median size of corundum is 1 μ m～8cm.
Above-described metallic aluminium powder, corundum, oxidation tungsten powder are mixed, and hybrid mode is mixed or wet mixing for doing; If wet mixing, blending agent is acetone or alcohol, adds Ceramic Balls or tungsten-carbide ball, and mixing time is 1～3 hour, mixes the back and dries in baking oven, removes Ceramic Balls or tungsten-carbide ball simultaneously.
With the powder coldmoulding that mixes, pressuring method be unidirectional pressurization, two-way pressurization or etc. static pressure, pressure is 100～400Mpa.
Sintering after the coldmoulding, sintering processing or pressureless sintering or hot pressed sintering, the sintering temperature of hot pressed sintering is 1000～1900 ℃, and the sintered heat insulating time is 0.5～5 hour, and sintering atmosphere is: bury the charcoal reducing atmosphere, argon gas or vacuum; Sintering or pressureless sintering, sintering temperature are 900～1500 ℃, and the sintered heat insulating time is 0.5～5 hour, sintering atmosphere: bury the charcoal reducing atmosphere, argon gas or vacuum.
Because adopt above-mentioned technological line, technology of the present invention is simple, calcining temperature is low, cost is low, the metal W of generation can be uniformly distributed in Al
2O
3In, form network, have good thermal conductivity and thermal shock resistance and resistance to fouling.
Four, embodiment
The invention will be further described below in conjunction with concrete embodiment.
Embodiment 1 is that the equal particle diameter of Tungsten oxide 99.999 powder peace of 1～200 μ m. is that the metallic aluminium powder of 1～200 μ m and corundum that median size is 1 μ m～8cm are by weight being WO with median size
3: Al: Al
2O
3=30～80%: 5～30%: 0～50% mixes, and adds the corundum ball as ball-milling medium, and mixing time is 1～3 hour, and mixture cold is molded, pressuring method be unidirectional pressurization or two-way pressurization or etc. static pressure, pressure is 100～400Mpa.Sintering processing is for burying charcoal pressureless sintering, and the sintering temperature of pressureless sintering is 900～1600 ℃, and the sintered heat insulating time is 0.5～5 hour, sintering atmosphere: bury the charcoal reducing atmosphere, argon gas.The Al that obtains
2O
3Metal W content in the/W matrix material is about 60%.
Embodiment 2 with median size be the metallic aluminium powder of equal particle diameter 1～200 μ m of Tungsten oxide 99.999 powder peace of 1～200 μ m and corundum that median size is 1 μ m～8cm by weight: WO
3: Al: Al
2O
3=30～80%: 5～30%: 0～50% mixes, add Ceramic Balls or tungsten-carbide ball as ball-milling medium, mixing time is 1～3 hour, and mixture cold is molded, pressuring method be unidirectional pressurization or two-way pressurization or etc. static pressure, pressure is 100～400Mpa.Sintering processing is a hot pressed sintering, and the sintering temperature of hot pressed sintering is 1000～1900 ℃, and the sintered heat insulating time is 0.5～5 hour, and sintering atmosphere is an argon gas.The Al that obtains
2O
3Metal W content in the/W matrix material is about 30～80%.
Claims (5)
1, a kind of Al
2O
3The manufacture method of/W matrix material is characterized in that percentage composition mixes moulding, sintering with 30～80% oxidation tungsten powder, 20～50% metallic aluminium powder, 0～60% corundum by weight;
-sintering or pressureless sintering, sintering temperature are 900～1600 ℃, and the sintered heat insulating time is 0.5～5 hour, and sintering atmosphere is: bury the charcoal reducing atmosphere, argon gas or vacuum;
-sintering or hot pressed sintering, sintering temperature are 1000～1900 ℃, and the sintered heat insulating time is 0.5～5 hour, and sintering atmosphere is: bury the charcoal reducing atmosphere, argon gas or vacuum.
2, Al according to claim 1
2O
3The manufacture method of/W matrix material, the median size that it is characterized in that described Tungsten oxide 99.999 are 1～200 μ m, and the median size of metallic aluminium powder is 1～200 μ m, and the median size of corundum is 1 μ m～8cm.
3, Al according to claim 1
2O
3The manufacture method of/W matrix material is characterized in that described dried the mixing or wet mixing that be mixed into; If wet mixing, blending agent is acetone or alcohol, adds Ceramic Balls or tungsten-carbide ball, and mixing time is 1～3 hour, mixes the back and dries in baking oven, removes Ceramic Balls or tungsten-carbide ball simultaneously.
4, Al according to claim 1
2O
3The manufacture method of/W matrix material is characterized in that the described coldmoulding that is shaped to, pressuring method be unidirectional pressurization, two-way pressurization or etc. static pressure, pressure is 100～400Mpa.
5, according to each described Al that uses in the claim 1～4
2O
3The Al that the preparation method of/W matrix material is prepared
2O
3/ W matrix material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115498 CN1256457C (en) | 2002-01-30 | 2002-01-30 | Method for mfg. Al2O3\W composite meterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115498 CN1256457C (en) | 2002-01-30 | 2002-01-30 | Method for mfg. Al2O3\W composite meterial |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1435499A CN1435499A (en) | 2003-08-13 |
| CN1256457C true CN1256457C (en) | 2006-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02115498 Expired - Fee Related CN1256457C (en) | 2002-01-30 | 2002-01-30 | Method for mfg. Al2O3\W composite meterial |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801705A (en) * | 2015-04-24 | 2015-07-29 | 第一拖拉机股份有限公司 | Ultra-fine aluminum oxide and tungsten mixed powder and preparation method thereof |
| CN105603235B (en) * | 2016-01-28 | 2017-09-01 | 河南科技大学 | A kind of wear-resisting tungsten alloy and preparation method thereof |
| CN106392092A (en) * | 2016-10-20 | 2017-02-15 | 上海应用技术大学 | Preparation method for elementary tungsten powder |
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2002
- 2002-01-30 CN CN 02115498 patent/CN1256457C/en not_active Expired - Fee Related
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