发明名称 |
High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check value, and method for manufacturing high-purity alumina sintered body |
摘要 |
A high-purity alumina sintered body having an alumina purity of not less than 99.9% by mass and a relative density of not less than 97% and exhibiting a weight loss of not greater than 100x10--4 kg/m2 when immersed in boiling 6N H2SO4 or 6N NaOH aqueous solution for 24 hours as measured according to JIS R1614 (1993). The high-purity alumina sintered body is obtained by firing a green body formed from an alumina powder having an alumina purity of not less than 99.9% by mass and containing, as impurities, Si, an Mg, Fe and alkali metals including Na, K and Li in a total amount of less than 100 ppm.
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申请公布号 |
US2001054443(A1) |
申请公布日期 |
2001.12.27 |
申请号 |
US20010885961 |
申请日期 |
2001.06.22 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
NIWA TOMONORI;YOGO TETSUJI |
分类号 |
C04B35/10;C04B35/111;F16C33/32;H01B17/00;(IPC1-7):F16K15/00 |
主分类号 |
C04B35/10 |
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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