Prepn of dense water-base silicon nitride suspension |
Title： |
| Prepn of dense water-base silicon nitride suspension |
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Application Number： |
01139801 |
Application Date： |
2001/11/29 |
Announcement Date： |
2002/05/15 |
Pub. Date： |
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Publication Number： |
1348937 |
Announcement Number： |
1166587 |
Grant Date： |
2004-9-15 |
Granted Pub. Date： |
2004-9-15 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C04B 35/584 |
Applicant(s)： |
Qinghua Univ. |
Inventor(s)： |
Huang Yong, Dai Jianqing, Xie Zhipeng |
Key Words： |
Prepn, dense, water-base, silicon nitride, suspension |
Abstract： |
This invention relates to a preparation method for aqueous concentrated suspension of silicon nitride. Firstly, silicon nitride powder is compounded into a slurry, its pH value is regulated with tetramethyl ammonium hydroxide, then the slurry is ground in ball mill, the above-mentioned powder is washed several times with deionized water as medium to remove solubable matter and high-valency counterion, it is thermo-insulated in air atmosphere, and finally the modified silicon nitride powder is added to high-purity deionized water, the suspension is regulated for pH value with tetramethyl ammonium hydroxide and is further ground in ball mill so to prepare the aqueous concentrated suspension of silicon nitride with low viscosity and high solid-phase content. By use of silicon nitride powder from different sources with similar good dispersivity, the aqueous concentrated suspension with solid-phase content higher than 50 vol.% can be prepared. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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