CN100509692C - Tungsten corundum ceramic material and low temperature sintering method - Google Patents
Tungsten corundum ceramic material and low temperature sintering method Download PDFInfo
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- CN100509692C CN100509692C CNB200710147095XA CN200710147095A CN100509692C CN 100509692 C CN100509692 C CN 100509692C CN B200710147095X A CNB200710147095X A CN B200710147095XA CN 200710147095 A CN200710147095 A CN 200710147095A CN 100509692 C CN100509692 C CN 100509692C
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- tungsten
- sintering
- corundum ceramic
- ceramic material
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- 239000010431 corundum Substances 0.000 title claims abstract description 15
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 15
- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 11
- 239000010937 tungsten Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000009766 low-temperature sintering Methods 0.000 title claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910001930 tungsten oxide Inorganic materials 0.000 claims abstract description 9
- 239000004927 clay Substances 0.000 claims abstract description 7
- 239000010433 feldspar Substances 0.000 claims abstract description 7
- 229910052623 talc Inorganic materials 0.000 claims abstract description 7
- 239000000454 talc Substances 0.000 claims abstract description 7
- 238000000498 ball milling Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 6
- 235000012222 talc Nutrition 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 25
- 239000000919 ceramic Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 238000009694 cold isostatic pressing Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- -1 silicon carbide compound Chemical class 0.000 description 1
- 238000002490 spark plasma sintering Methods 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
本发明公开了一种钨刚玉陶瓷材料及低温烧结方法。钨刚玉陶瓷材料中原料重量百分比含量为：氧化铝粉85～99.5%、氧化钨0.1～3.0%、粘土0.1～14.5%、长石0.1～14.5%、碳酸钙0.1～14.5%、滑石0.1～14.5%。步骤为：将上述原料球磨混合3小时后在空气中于100℃烘干24小时；采用冷等静压成型，在200～300MPa下保压3分钟；在硅钼炉中1350～1550℃保温0.5～3小时烧结，随炉冷却，可获得钨刚玉陶瓷材料。本发明采用一般工业设备，工艺简单，有利于刚玉陶瓷工业化生产；不仅显著降低氧化铝陶瓷的烧结温度，同时抗弯强度可以达到350～600Mpa；能显著降低高铝陶瓷生产中的高温能耗及产品成本，同时获得高强氧化铝陶瓷。
The invention discloses a tungsten corundum ceramic material and a low-temperature sintering method. The weight percentage content of raw materials in tungsten corundum ceramic materials is: alumina powder 85-99.5%, tungsten oxide 0.1-3.0%, clay 0.1-14.5%, feldspar 0.1-14.5%, calcium carbonate 0.1-14.5%, talc 0.1-14.5% %. The steps are: mix the above raw materials by ball milling for 3 hours, and then dry them in the air at 100°C for 24 hours; use cold isostatic pressing, and hold the pressure at 200-300MPa for 3 minutes; After ~3 hours of sintering and cooling with the furnace, tungsten corundum ceramic materials can be obtained. The present invention adopts general industrial equipment, and the process is simple, which is beneficial to the industrial production of corundum ceramics; not only significantly reduces the sintering temperature of alumina ceramics, but also can achieve a bending strength of 350-600Mpa; it can significantly reduce high-temperature energy consumption and Product cost, while obtaining high-strength alumina ceramics.
Description
Technical field
The invention belongs to the alumina ceramic material technical field, particularly a kind of corundum ceramic material and low-temperature sintering method thereof that adds Tungsten oxide 99.999.
Background technology
Alumina-ceramic claims the corundum porcelain again, has excellent mechanical property, electrical property, thermal characteristics, very high specular reflectance excluded, erosion resistance, abundant raw material is inexpensive and than MgO, SiC, Si
3N
4Pottery is the characteristic of easy-sintering more, it is the base mateiral that is used for making multiple high strength, performance ceramic component such as wear-resistant, high temperature resistant, and demand is huge, thereby concern extremely both domestic and external, in modern industry and modern science and technology field, obtain application more and more widely, be present most widely used a kind of special cermacis, Application Areas relates to every field such as metallurgy, chemical industry, electromechanics, boats and ships, aerospace, military affairs.In alumina-ceramic is produced, all exist same problem both at home and abroad, promptly can not make the high-performance alumina-ceramic with existing industrial production technology, low cost.The sintering temperature of alumina ceramics is up to 1600～1700 ℃, and investment is big, the energy consumption height, and bending strength generally only is 250-350MPa.Quality product is difficult to further improve, and has limited applying of it.The alumina-ceramic sintering temperature is higher, easily causes grain growth, causes mechanical properties decrease generally to adopt the way that adds the liquid phase substance acceleration of sintering.By the difference of the mode of action, additive is by the sintering of two kinds of form promotes oxidn aluminium.The first, form liquid phase between additive system itself or additive and the alumina substrate, this class additive such as SiO
2And MgO, CaO, SrO, BaO etc., the existence of liquid phase has made things convenient for the rearrangement of alumina particle, simultaneously by melting-the PRECIPITATION MECHANISM acceleration of sintering.The second, form sosoloid with alumina substrate,, make rate of diffusion become big by increasing the lattice distortion of aluminum oxide, thus acceleration of sintering.Additive such as TiO
2, Cr
2O
3, Fe
2O
3, MnO
2, Y
2O
3Deng.But, when add-on more after a little while, sintering temperature is still higher; When add-on increased, though help sintering, descending by a relatively large margin appearred in final material mechanical performance.
In order to address these problems, Chinese scholars had all been carried out number of research projects in recent years.Both at home and abroad impressive progress has been obtained about the research level of alumina-ceramic in the laboratory, and Japanese scientist develops bending strength in the nineties and reaches〉alumina sample of 1000MPa.Proposition is made raw material with superfine alumina powder, can prepare the excellent dense base substrate at 1400 ℃ of sintering, but its superfine alumina powder complicated process of preparation, cost is very high.There is similar problem at present equally in China, though domestic scholars is also being done number of research projects aspect the sintering temperature of alumina raw material preparation and reduction alumina-ceramic, all fundamentally do not solve the price of alumina-ceramic and the contradiction between the performance, the researchist of China also obtains bending strength 300～500MPa under laboratory condition, even the alumina sample of 1000MPa, the raw material that adopts is that superfine nano aluminum oxide powder and nanometer silicon carbide compound material add spark plasma sintering or HIP sintering, its bending strength is greatly improved, but do not have industrial value, industrial production can't be promoted.
Summary of the invention
The objective of the invention is is exactly to adopt industrial raw material, by adding Tungsten oxide 99.999, utilize the atmospheric low-temperature sintering technology to prepare the high-strength alumina pottery of the big 300～600MPa of bending strength, can solve above-mentioned sintering temperature too high, adopt ultrafine powder or excessive, the problem that product cost is high with ionic discharge sintering or energy consumption that HIP sintering produced.
The raw material weight percent content is in the tungsten corundum ceramic material that the present invention relates to: aluminum oxide powder 85～99.5%, Tungsten oxide 99.999 0.1～3.0%, clay 0.1～14.5%, feldspar 0.1～14.5%, lime carbonate 0.1～14.5%, talcum 0.1～14.5%.
Concrete steps are:
(1) in aluminum oxide powder, add Tungsten oxide 99.999, with clay, feldspar, lime carbonate, talcum as sintering aid;
(2) mixing of above-mentioned raw materials ball milling was dried 24 hours in 100 ℃ in air after 3 hours;
(3) 3 minutes cold isostatic compactions of pressurize under 200～300MPa;
(4) 0.5～3 hour sintering of 1350～1550 ℃ of insulations in silicon molybdenum stove, furnace cooling, can obtain bending strength is that 300～600MPa sintered compact is a tungsten corundum ceramic material.
The present invention adopts general industry equipment, and technology is simple, helps the corundum ceramic suitability for industrialized production; Not only significantly reduce the sintering temperature of alumina-ceramic, bending strength can reach 350～600Mpa simultaneously; Can significantly reduce high temperature energy consumption and product cost in the high alumina ceramic production, obtain the high-strength alumina pottery simultaneously.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1:
(1) raw material weight per-cent is: α-Al
2O
3Powder 90%, Tungsten oxide 99.999 1%, feldspar 3%, lime carbonate 2%, clay 3% and talcum 1%, batching according to the above ratio;
(2) mixing of above-mentioned raw materials ball milling was dried 24 hours in 100 ℃ in air after 3 hours;
(3) adopt cold isostatic compaction, pressurize is 3 minutes under 200MPa;
(4) in silicon molybdenum stove under 1430 ℃ of normal pressures sintering, be incubated 2 hours.
The bending strength of obtained product is 450MPa.
Embodiment 2:
(1) raw material weight per-cent is: α-Al
2O
3Powder 95%, Tungsten oxide 99.999 2%, feldspar 0.5%, lime carbonate 1%, clay 1% and talcum 0.5%, batching according to the above ratio;
(2) mixing of above-mentioned raw materials ball milling was dried 24 hours in 100 ℃ in air after 3 hours;
(3) adopt cold isostatic compaction, pressurize is 3 minutes under 300MPa;
(4) in silicon molybdenum stove under 1520 ℃ of normal pressures sintering, be incubated 2 hours.
The bending strength of obtained product is 550MPa.
Claims (2)
1. a tungsten corundum ceramic material is characterized in that the raw material weight degree of tungsten corundum ceramic material is: aluminum oxide powder 85～99.5%, Tungsten oxide 99.999 0.1～3.0%, clay 0.1～14.5%, feldspar 0.1～14.5%, lime carbonate 0.1～14.5%, talcum 0.1～14.5%.
2. the low-temperature sintering method of the described tungsten corundum ceramic material of claim 1 is characterized in that concrete steps are:
(1) in aluminum oxide powder, add Tungsten oxide 99.999, with clay, feldspar, lime carbonate, talcum as sintering aid;
(2) mixing of above-mentioned raw materials ball milling was dried 24 hours in 100 ℃ in air after 3 hours;
(3) adopt cold isostatic compaction, pressurize is 3 minutes under 200～300MPa pressure;
(4) 0.5～3 hour sintering of 1350～1550 ℃ of insulations in silicon molybdenum stove, furnace cooling, can obtain bending strength is that 300～600MPa sintered compact is a tungsten corundum ceramic material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710147095XA CN100509692C (en) | 2007-09-04 | 2007-09-04 | Tungsten corundum ceramic material and low temperature sintering method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710147095XA CN100509692C (en) | 2007-09-04 | 2007-09-04 | Tungsten corundum ceramic material and low temperature sintering method |
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| CN101148352A CN101148352A (en) | 2008-03-26 |
| CN100509692C true CN100509692C (en) | 2009-07-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412619B (en) * | 2008-11-12 | 2013-04-17 | 李海峰 | Micropore hydrogenated aluminum porcelain tube and preparation thereof |
| KR101903355B1 (en) * | 2012-01-11 | 2018-11-22 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | Refractory object and process of forming a glass sheet using the refractory object |
| KR102363114B1 (en) * | 2017-12-27 | 2022-02-15 | 쇼와 덴코 가부시키가이샤 | Alumina sintered body precursor, alumina sintered body manufacturing method, grinding stone particle manufacturing method and alumina sintered body |
| CN110903076B (en) * | 2019-12-03 | 2020-12-25 | 浙江科奥陶业有限公司 | Corundum refractory product for hydrogen-filled molybdenum rod heating furnace and application method thereof |
| CN111747734A (en) * | 2020-05-22 | 2020-10-09 | 广东日禾电器有限公司 | Preparation method of low-temperature sintering heating ceramic material |
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Granted publication date: 20090708 Termination date: 20180904 |