发明名称 |
ALUMINA CERAMIC FOR SPARK PLUG INSULATOR |
摘要 |
<p>A spark plug includes an insulator formed of a ceramic material. The ceramic material comprises A12O3 in an amount of 98.00 wt% to 99.50 wt%; Group 2 oxides in an amount of 0. 1 6 wt% to 0.70 wt%; SiO2 in an amount of 0.25 wt% to 0.75 wt%. Group 4 oxides i n an amount of 0.01 wt% to 0. 16 wt%. Group 1 oxides in an amount less than 0.0060 wt%, and P2O5 in an amount of less than 0.0040 wt%. The AL2O3 is formed of particles having a D50 median particle size by volume of 1.2 µ?? to 1.8 µ?. The ceramic material is pressed, sintered, and formed to a predetermined shape. The sintered ceramic material includes a glass phase comprising the AI2O3, Group 2 oxides, and SiO2. The sintered ceramic material also includes secondary crystals of calcium hexa-aluminate (CaAl 12O19) spinel (MgAl2O4), anorthite (CaAl2Si2O8), and mullite (Al6Si2O13).</p> |
申请公布号 |
WO2011133741(A1) |
申请公布日期 |
2011.10.27 |
申请号 |
WO2011US33374 |
申请日期 |
2011.04.21 |
申请人 |
FEDERAL-MOGUL IGNITION COMPANY;WALKER, WILLIAM, J.;SACCOCCIA, MICHAEL, E. |
发明人 |
WALKER, WILLIAM, J.;SACCOCCIA, MICHAEL, E. |
分类号 |
C04B35/03;C04B35/04;C04B35/10;C04B35/443;C04B35/48;C04B35/49;H01T13/00;H01T13/38 |
主分类号 |
C04B35/03 |
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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