发明名称 |
Sinterkörper aus Aluminiumoxid |
摘要 |
The present invention provides an improved alumina sintered body on which a heater electrode is printed and which is sintered simultaneously with the heater electrode at temperatures lower than the optimum value 1,520 degrees C. The alumina sintered body includes high purity of alumina and 2 through 18% by weight partially stabilized zirconia, which further contains 2 through 6 mole percent solid solution of an oxide or oxides selected from Y2O3, Sc2O3, and lanthanum series metal oxides. The high purity of alumina may contain 0.1% by weight alkaline metals and/or alkaline earth metals and 1.0% by weight SiO2 at most. In the alumina sintered body of the invention, segregation and migration of impurities and chipping are effectively prevented and hence the durability of the sintered body is highly improved. Use of the alumina sintered body of the invention as a heater base makes the durability of a heater much longer. |
申请公布号 |
DE4101537(C2) |
申请公布日期 |
1999.10.14 |
申请号 |
DE19914101537 |
申请日期 |
1991.01.19 |
申请人 |
NGK SPARK PLUG CO. |
发明人 |
KAWAI, TAKESHI;HAYAKAWA, NOBUHIRO;AIBA, HARUMI |
分类号 |
C04B35/111;C04B35/119;H01C7/00;H05B3/14;H05B3/28;(IPC1-7):H05B3/14;B41M1/34;C04B35/48;C04B35/10;B41M1/12 |
主分类号 |
C04B35/111 |
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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