发明名称 |
Process for making a homogeneous doped silicon nitride article |
摘要 |
A process for making a homogeneous yttria-alumina doped silicon nitride article is described. A uniform coating of yttria and alumina is applied to the surface of silicon nitride particles by a chemical application of the hydroxides of yttrium and aluminum followed by drying and a subsequent conversion of the hydroxides to the corresponding oxides. The resulting powder is formed into an article and pressureless sintered to a density greater than 99% of theoretical.
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申请公布号 |
US4814128(A) |
申请公布日期 |
1989.03.21 |
申请号 |
US19870041884 |
申请日期 |
1987.04.23 |
申请人 |
GTE LABORATORIES INCORPORATED |
发明人 |
LIEBERMAN, SHELDON;TRICKETT, ELIZABETH;SU, SOPHIA R. |
分类号 |
C04B35/584;C04B35/628;C04B41/50;C04B41/87;(IPC1-7):C04B35/58 |
主分类号 |
C04B35/584 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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