发明名称 |
Porous Si3N4 and producing method thereof |
摘要 |
A producing method of a porous Si 3 N 4 having high porosity and formed of Si 3 N 4 particles having a high aspect ratio includes the following steps. A compound of a rare earth element as a first sintering agent is mixed in an amount of 7.5-45 parts by mass, in terms of an oxide of the element, with respect to 100 parts by mass of Si powder to obtain mixed powder. A binder is added to the mixed powder, which is then molded into a molded body. The molded body is heated in a nitrogen atmosphere to 300-500°C to remove the binder. The binder-removed body is heated in a nitrogen atmosphere to 1350-1500°C for nitriding. The nitrided body is then sintered at 1750-1900°C at a nitrogen pressure of 0.1-1 atmosphere. |
申请公布号 |
EP1443030(A3) |
申请公布日期 |
2006.06.21 |
申请号 |
EP20040250236 |
申请日期 |
2004.01.19 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SATOH, TAKESHI;PARK, JIN-JOO |
分类号 |
B01D39/20;C04B35/593;B01D39/00;C04B35/584;C04B35/591;C04B35/594;C04B35/638;C04B38/00 |
主分类号 |
B01D39/20 |
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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