发明名称 |
SPARK PLUG |
摘要 |
A spark plug including an insulator containing an Al component, in terms of oxides, 89 mass % or more and a Ti component, in terms of oxides, more than 0 mass % and 0.2 mass % or less, characterized in that the insulator is formed of an alumina-based sintered material which contains, in a grain boundary phase present between alumina crystal grains, a first crystal phase containing at least one species selected from among an La component, an Nd component, a Pr component, a Y component, an Er component, a Yb component, and an Lu component, and a second crystal phase containing at least one species of Group 2 element components, an Al component and an Si component. |
申请公布号 |
US2015207300(A1) |
申请公布日期 |
2015.07.23 |
申请号 |
US201314420819 |
申请日期 |
2013.08.23 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
Takeuchi Hiroki;Yokoyama Yutaka;Tanaka Kuniharu;Mitsuoka Takeshi;Honda Toshitaka;Kurono Hirokazu;Takaoka Katsuya;Uegaki Hironori |
分类号 |
H01T13/38;C04B35/10 |
主分类号 |
H01T13/38 |
代理机构 |
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代理人 |
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主权项 |
1. A spark plug having an insulator containing an Al component, in terms of oxides, 89 mass % or more and a Ti component, in terms of oxides, more than 0 mass % and 0.2 mass % or less, characterized in that
the insulator is formed of an alumina-based sintered material which contains, in a grain boundary phase present between alumina crystal grains, a first crystal phase containing at least one species selected from among an La component, an Nd component, a Pr component, a Y component, an Er component, a Yb component, and an Lu component, and a second crystal phase containing at least one species of Group 2 element components, the Group included in the periodic table defined by Recommendations 1990, IUPAC, an Al component, and an Si component. |
地址 |
Nagoya-shi, Aichi JP |