发明授权
- 专利标题： Oxygen sensor for preventing silicon poisoning
- 专利标题（中）： 用于防止硅中毒的氧传感器
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申请号： US408132申请日： 1995-03-21
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公开(公告)号： US5849165A公开(公告)日： 1998-12-15
- 发明人: Takao Kojima , Hiroyuki Ishiguro , Masaru Yamano , Toshiki Sawada , Kazuo Taguchi , Masahiko Yamada , Noriaki Kondo
- 申请人： Takao Kojima , Hiroyuki Ishiguro , Masaru Yamano , Toshiki Sawada , Kazuo Taguchi , Masahiko Yamada , Noriaki Kondo
- 申请人地址： JPX Nogoya
- 专利权人： NGK Spark Plug Co. Ltd.
- 当前专利权人： NGK Spark Plug Co. Ltd.
- 当前专利权人地址： JPX Nogoya
- 优先权： JPX63-276743 19881101; JPX63-276744 19881101; JPX63-276302 19881102; JPX63-328993 19881228; JPX1-63942 19890317; JPX1-252025 19890929
- 主分类号： G01N27/407
- IPC分类号： G01N27/407 ; G01N27/416 ; G01N27/12 ; G01N27/409 ; G01N27/41
摘要：
Oxygen sensor element (ZrO.sub.2 solid electrolyte etc) for detecting oxygen concentration in an exhaust gas has a protective layer which is made of a heat-resistant metal oxide and which carries a component of a IIa subgroup element (Ca, Mg etc) on the side exposed to the exhaust gas of the sensor element, at least a part of the protective layer being present as a nonstoichiometric compound (Ti oxide etc) with respect to the heat-resistant metal oxide. Si-poisoning is prevented. Heater for heating the sensor element is provided for preventing Si-poisoning at low temperatures.
公开/授权文献
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