Spark Plug Having a Ceramic Insulator with Improved High Temperature Electrical Properties
    42.
    发明申请
    Spark Plug Having a Ceramic Insulator with Improved High Temperature Electrical Properties 有权
    具有改进的高温电气特性的陶瓷绝缘体的火花塞

    公开(公告)号:US20080143229A1

    公开(公告)日:2008-06-19

    申请号:US11611946

    申请日:2006-12-18

    申请人: William J. Walker

    发明人: William J. Walker

    IPC分类号: H01T13/38

    摘要: A spark plug which includes a center electrode metal shell and an insulator disposed therebetween utilizes for the insulator or ceramic with improved high temperature electrical properties which includes alumina in an amount between about 90 and about 99% by weight, a zirconium containing compound in an amount between about 0 and about 1% by weight, and an oxide mixture in an amount between about 1 and about 10% by weight. The oxide mixture includes a glass former, a network modifier and alumina in an amount between about 16% and about 40% by weight after firing, wherein the molar ratio of the glass former to the network modifier ranges between about 0.8:1 and 1.2:1. The ceramic insulator is particularly adapted for use as an insulator in a spark plug to provide improved dielectric strength and shunt resistance of greater than one 1000 megaohms at 1000 degrees Fahrenheit, so as to reduce the shunting of the spark plug and thereby improve the quality of the spark generated by the spark plug.

    摘要翻译: 包括中心电极金属壳和设置在其间的绝缘体的火花塞利用具有改进的高温电性能的绝缘体或陶瓷,其包括约90重量%至约99重量%之间的氧化铝,量为含锆化合物 约0至约1重量%,以及约1至约10重量%的量的氧化物混合物。 氧化物混合物包括玻璃形成剂,网络改性剂和煅烧后约16%至约40%重量的氧化铝,其中玻璃形成剂与网络改性剂的摩尔比在约0.8:1至1.2:1之间, 1。 陶瓷绝缘子特别适合用作火花塞中的绝缘体,以在1000华氏度时提供大于一千千兆欧姆的改善的介电强度和分流电阻,以便减少火花塞的分流,从而提高火花塞的质量 由火花塞产生的火花。