SPARK PLUG
    2.
    发明申请
    SPARK PLUG 有权
    SPARK插头

    公开(公告)号:US20150047880A1

    公开(公告)日:2015-02-19

    申请号:US14377306

    申请日:2012-11-29

    IPC分类号: H01T13/38

    摘要: A spark plug exhibiting excellent withstand voltage characteristics and mechanical strength at high temperature, which are comparable to those at ambient temperature. The spark plug having an insulator formed of an alumina-based sintered material containing: an Al component, an Si component, a Group 2 element component, and a rare earth element component. The amounts of such components satisfy a condition (1): 0.25≦ oxide-reduced amount (mass %) of the Si component ≦1.25, and a condition (2): 1.35≦[(oxide-reduced amount of the Si component)/((oxide-reduced amount of the Group 2 element component)/(oxide-reduced amount of the rare earth element component))]≦7.5. The alumina-based sintered material includes alumina grains, and a glass phase including a crystal phase that satisfies a condition (3) that the crystal phase includes at least one of an aluminate crystal phase and a silicate crystal phase, each having a grain size of 20 to 350 nm.

    摘要翻译: 具有优异的耐高压特性和高温下的机械强度的火花塞,与环境温度相当。 所述火花塞具有绝缘体,所述绝缘体由包含Al组分,Si组分,第2族元素组分和稀土元素组分的氧化铝基烧结材料形成。 这些组分的量满足条件(1):0.25≦̸ Si成分的氧化物还原量(质量%):1.25,条件(2):1.35≦̸ [(Si成分的氧化物还原量)/((第2族元素成分的氧化物还原量 )/(氧化物还原量的稀土元素成分))]≦̸ 7.5。 所述氧化铝系烧结体包含氧化铝粒子,以及含有结晶相的玻璃相,所述结晶相满足以下条件(3):所述结晶相包含铝酸盐结晶相和硅酸盐结晶相中的至少一种, 20〜350nm。