CN100532319C - Mo-corundum ceramic material and low-temperature sintering method - Google Patents
Mo-corundum ceramic material and low-temperature sintering method Download PDFInfo
- Publication number
- CN100532319C CN100532319C CNB200710147352XA CN200710147352A CN100532319C CN 100532319 C CN100532319 C CN 100532319C CN B200710147352X A CNB200710147352X A CN B200710147352XA CN 200710147352 A CN200710147352 A CN 200710147352A CN 100532319 C CN100532319 C CN 100532319C
- Authority
- CN
- China
- Prior art keywords
- ceramic material
- percent
- sintering
- corundum ceramic
- molybdenum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a molybdenum corundum ceramic material and a low-temperature sintering method. The molybdenum corundum ceramic material is made from the raw materials with the following weight percentage content of 85-99.5 percent of alumina powder, 0.1-3.0 percent of molybdenum oxide, 0.1-14.5 percent of clay, 0.1-14.5 percent of feldspar, 0.1-14.5 percent of calcium carbonate and 0.1-14.5 percent of talc. The steps include: milling the raw materials for three hours and drying the materials at 100 DEG C for 24h in the air; adopting the cold isostatic pressing forming and keeping the pressure under 200-300MPa for three minutes; keeping the milled materials at the temperature of 1350-1550 DEG C for 0.5-3h in a si-mo furnace, sintering and cooling the materials with the furnace to obtain the molybdenum corundum ceramic material. The invention adopts general industrial equipment and the process is simple, which is beneficial to the industrialized production of the corundum ceramics. The sintering temperature of the alumina ceramics is obviously lowered, the bending strength can reach to 350-600MPa, the high temperature energy consumption and the product cost of rich aluminum ceramics can be obviously lowered, and alumina ceramics with high strength are obtained at the same time.
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 molybdenum oxide.
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 molybdenum oxide, utilize the atmospheric low-temperature sintering technology to prepare the high-strength alumina pottery that bending strength is 300～600MPa, 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 Mo-corundum ceramic material that the present invention relates to: aluminum oxide powder 85～99.5%, molybdenum oxide 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 molybdenum oxide, 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 Mo-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 92%, molybdenum oxide 1%, feldspar 1%, 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 pressure;
(4) in silicon molybdenum stove in 1430 ℃ normal pressure-sintered, be incubated 2 hours.
The bending strength of obtained product is 430MPa.
Embodiment 2:
(1) raw material weight per-cent is: α-Al
2O
3Powder 95%, molybdenum oxide 0.5%, feldspar 1%, lime carbonate 1%, clay 1.5% 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) 3 minutes cold isostatic compactions of pressurize under the 300MPa;
(4) in silicon molybdenum stove in 1480 ℃ normal pressure-sintered, be incubated 2 hours.
The bending strength of obtained product is 500MPa.
Claims (2)
1. a Mo-corundum ceramic material is characterized in that the raw material weight degree of Mo-corundum ceramic material is: aluminum oxide powder 85～99.5%, molybdenum oxide 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 Mo-corundum ceramic material of claim 1 is characterized in that concrete steps are:
(1) in aluminum oxide powder, add molybdenum oxide, 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 Mo-corundum ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710147352XA CN100532319C (en) | 2007-09-04 | 2007-09-04 | Mo-corundum ceramic material and low-temperature sintering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710147352XA CN100532319C (en) | 2007-09-04 | 2007-09-04 | Mo-corundum ceramic material and low-temperature sintering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101182190A CN101182190A (en) | 2008-05-21 |
| CN100532319C true CN100532319C (en) | 2009-08-26 |
Family
ID=39447632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710147352XA Expired - Fee Related CN100532319C (en) | 2007-09-04 | 2007-09-04 | Mo-corundum ceramic material and low-temperature sintering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100532319C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106978562A (en) * | 2016-11-26 | 2017-07-25 | 佛山市尚好门窗有限责任公司 | A kind of alumina material containing chromium |
| CN108358612A (en) * | 2018-01-18 | 2018-08-03 | 常熟市创新陶瓷有限公司 | The preparation method of low-friction coefficient coffee color alumina ceramic material |
| 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 |
| CN111253150B (en) * | 2020-03-03 | 2021-04-16 | 武汉理工大学 | Preparation method of mullite-corundum composite ceramic substrate for electronic packaging |
| 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 |
| CN112250427A (en) * | 2020-10-21 | 2021-01-22 | 苏州晶瓷超硬材料有限公司 | Sintering process of high-purity silicon oxide ceramic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078709A (en) * | 1992-05-18 | 1993-11-24 | 中国科学院上海硅酸盐研究所 | The low-temperature sintering of high alumina ceramic |
| CN1533999A (en) * | 2003-04-02 | 2004-10-06 | 珠海粤科清华电子陶瓷有限公司 | Low temperature sintered 99 aluminium oxide ceramic and its production method and use |
-
2007
- 2007-09-04 CN CNB200710147352XA patent/CN100532319C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078709A (en) * | 1992-05-18 | 1993-11-24 | 中国科学院上海硅酸盐研究所 | The low-temperature sintering of high alumina ceramic |
| CN1533999A (en) * | 2003-04-02 | 2004-10-06 | 珠海粤科清华电子陶瓷有限公司 | Low temperature sintered 99 aluminium oxide ceramic and its production method and use |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101182190A (en) | 2008-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100532319C (en) | Mo-corundum ceramic material and low-temperature sintering method | |
| CN111620679B (en) | Method for preparing high-purity mullite material by taking fused silica as silicon source | |
| CN1326804C (en) | Alumina base mullite homogeneous material preparation method | |
| CN103755332B (en) | Desert wind sand is utilized to prepare the method for cordierite ceramic | |
| CN100509692C (en) | Tungsten corundum ceramic material and low temperature sintering method | |
| CN105294138A (en) | Doublet aluminum oxide micropowder and preparation method thereof | |
| CN1264777C (en) | Reinforced daily ceramic manufacturing process | |
| CN100436369C (en) | Method for preparing corundum bricks composite with Nano alpha-Al2O3 | |
| CN102049514B (en) | Powder for aluminum oxide ceramics nano metallized paste and preparation method thereof | |
| CN111925195A (en) | Ceramic tile with high modulus of rupture and preparation method thereof | |
| CN113336563B (en) | Sialon whisker-corundum composite ceramic material using natural mineral as raw material, preparation method thereof and prepared product | |
| CN103086702A (en) | Aluminum oxide ceramic and manufacturing method thereof | |
| CN107867828A (en) | A kind of Al2O3The preparation method of ceramic material and its application as microwave ceramics window material | |
| CN111635238A (en) | Low-porosity high-thermal-shock-resistance clay brick and preparation method thereof | |
| CN113817946A (en) | HEA-SiC high-temperature wave-absorbing material and preparation method thereof | |
| CN108484161B (en) | Aluminum titanate composite material and preparation method thereof | |
| CN115321946A (en) | Long-life low-cost refractory castable and preparation method thereof | |
| CN104291825B (en) | A kind of to synthesize the SiC ceramic low-temperature melt producing method that celsian-felspar is sintering aid | |
| CN107352975A (en) | A kind of heat-insulated magnesite-dolomite refractories of light weight and preparation method thereof | |
| CN114380606A (en) | Preparation process of machined high-strength refractory material | |
| CN110699566B (en) | CaMn7O12Reinforced low-expansion high-thermal-conductivity copper-based composite material and preparation method thereof | |
| CN106348773A (en) | Erosion fire-resistant crucible of Lithium electricity resistance material added with SiAlON-AlN-TiN | |
| CN112551898A (en) | High-strength electric porcelain white glaze and preparation method thereof | |
| CN101768004B (en) | Low-pore in situ oriental topaz brick and preparation method thereof | |
| CN113480296B (en) | Modified refractory brick with high thermal shock stability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20180904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |