Measuring sensor for determining the oxygen content of gas mixtures
    5.
    发明授权
    Measuring sensor for determining the oxygen content of gas mixtures 失效
    用于测定气体混合物氧含量的测量传感器

    公开(公告)号:US5702580A

    公开(公告)日:1997-12-30

    申请号:US617873

    申请日:1996-03-21

    CPC分类号: G01N27/417

    摘要: A measuring sensor for determining oxygen content in a gas mixture including exhaust gases of internal combustion engines, includes a base substrate which is comprised of a base material and which is electrically insulating; and an electrochemical measuring probe and an electrochemical reference probe arranged separate from each other on the base substrate. The measuring probe includes at least one internal electrode; at least one solid electrolyte island; and at least one external electrode. The measuring probe additionally includes a diffusion barrier. Further base material layers composed of the base material are provided so as to embed at least the diffusion barrier, the at least one internal electrodes for the measuring probe and the internal electrode for the reference probe. A diffusion hole is defined between the measuring probe and the reference probe which extends from the base substrate through the diffusion barrier and respective base material layers, and out to the gas mixture to be measured. Thermal stress and the accompanying tendency to cracking is reduced by providing the solid electrolyte as islands. Separate disposition of the measuring probe and the reference probe, i.e., without a common electrode, permits construction as individual layers using, for example, screen printing.

    摘要翻译: PCT No.PCT / DE95 / 01305 Sec。 371日期1996年3月21日 102(e)日期1996年3月21日PCT提交1995年9月22日PCT公布。 公开号WO96 / 11394 日期1996年04月18日用于测定包括内燃机废气的气体混合物中的氧含量的测量传感器包括由基材构成并且是电绝缘的基底, 以及在基底基板上彼此分离设置的电化学测量探针和电化学参考探针。 测量探头包括至少一个内部电极; 至少一个固体电解质岛; 和至少一个外部电极。 测量探头还包括扩散阻挡层。 提供由基材构成的其他基材层,以便至少嵌入扩散阻挡层,至少一个用于测量探针的内部电极和用于参考探针的内部电极。 在测量探针和参考探针之间限定了扩散孔,该探针从基底基底通过扩散阻挡层和相应的基底层层延伸出来,并且进入待测量的气体混合物。 通过提供固体电解质作为岛来减少热应力和伴随的开裂倾向。 测量探针和参考探针的单独布置,即没有公共电极,可以使用例如丝网印刷将结构设计为单独的层。