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    • 67. 发明授权
    • Multilayered air-fuel ratio sensing element
    • 多层空燃比传感元件
    • US06258233B1
    • 2001-07-10
    • US09237918
    • 1999-01-27
    • Tomio SugiyamaMasahiro ShibataHiromi Sano
    • Tomio SugiyamaMasahiro ShibataHiromi Sano
    • G01N27409
    • G01N27/4073
    • A multilayered air-fuel ratio sensing element has a zirconic solid electrolytic body and a heat-generating portion including an alumina substrate located adjacent to the zirconic solid electrolytic body. The zirconic solid electrolytic body is made of a partially stabilized zirconia containing 5˜7 mol % yttria and having a mixed phase structure including a cubic phase, a monoclinic phase and a tetragonal phase. The zirconic solid electrolytic body has a relative density of 94˜100% with a mean sintered grain size RZR of 0.5˜3.0 &mgr;m. The alumina substrate has a relative density of 95˜100% with a mean sintered grain size RAL of 0.5˜4.0 &mgr;m. And, the partially stabilized zirconia has an M/C ratio in a range from 0.05 to 0.25.
    • 多层空燃比传感元件具有锆固体电解体和发热部,该发热部包括与锆固体电解体相邻的氧化铝基板。 锆固体电解体由含有5〜7摩尔%氧化钇的部分稳定的氧化锆制成,具有立方相,单斜晶相和四方晶相的混合相结构。 锆固体电解质的相对密度为94〜100%,平均烧结粒度RZR为0.5〜3.0μm。 氧化铝基板的相对密度为95〜100%,平均烧结晶粒尺寸RAL为0.5〜4.0μm。 而且,部分稳定的氧化锆的M / C比在0.05-0.25的范围内。