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    • 33. 发明授权
    • Exhaust gas sensor and method of producing the same
    • 废气传感器及其制造方法
    • US5423973A
    • 1995-06-13
    • US211083
    • 1994-06-20
    • Karl-Hermann FrieseHans-Martin WiedenmannHelmut Weyl
    • Karl-Hermann FrieseHans-Martin WiedenmannHelmut Weyl
    • G01N27/12G01N27/407G01N27/409G01N27/41G01N27/26
    • G01N27/4075
    • An exhaust gas sensor which is exposed to exhaust gas, includes a measuring electrode; and a porous ceramic coating provided on the measuring electrode and comprised of at least two layers, a first porous ceramic layer which is provided on the measuring electrode and at least a second porous ceramic layer which is provided on the first porous ceramic layer and which is directly exposed to the exhaust gas, wherein the first porous ceramic layer contains getter substances for removal of substances that are harmful to the measuring electrode, and wherein the second porous ceramic layer is provided with one of a diffusion resistance or a catalytic effect relative to exhaust gas constituents such that, at the boundary of the first and second porous ceramic layers, a gas composition is present in use which is comprised of one of oxidizable or reducible gas constituents and which sets a control position for the exhaust gas sensor.
    • PCT No.PCT / DE92 / 00714 Sec。 371日期:1994年6月20日 102(e)日期1994年6月20日PCT提交1992年8月27日PCT公布。 公开号WO93 / 06472 日本1997年4月1日。一种暴露于废气的排气传感器,包括测量电极; 以及设置在所述测量电极上并且包括至少两层的多孔陶瓷涂层,设置在所述测量电极上的第一多孔陶瓷层和设置在所述第一多孔陶瓷层上的至少第二多孔陶瓷层, 直接暴露于废气中,其中第一多孔陶瓷层含有用于除去对测量电极有害的物质的吸气剂物质,并且其中第二多孔陶瓷层具有相对于排气的扩散阻力或催化作用之一 气体成分,使得在第一和第二多孔陶瓷层的边界处,存在使用中的气体组合物,其由可氧化或可还原的气体成分之一组成,并且设置用于排气传感器的控制位置。
    • 35. 发明授权
    • Shielded, heated electrochemical gas sensor
    • 屏蔽,加热电化学气体传感器
    • US4400260A
    • 1983-08-23
    • US367276
    • 1982-04-12
    • Roland StahlHans-Martin Wiedenmann
    • Roland StahlHans-Martin Wiedenmann
    • G01N27/41G01N27/406G01N27/407G01N27/409G01N27/416H05B3/14G01N27/46
    • G01N27/4071G01N27/4067
    • To extend temperature range of solid electrolyte ion conductive-type gas sensors, particularly for the exhaust gases from internal combustion engines, and to prevent leakage currents between a heater element and the solid electrolyte body at temperatures just above the response temperature of the sensor, but below its normal operating temperatures, that is, even in the range of between 250.degree. C. to 400.degree. C., a layer-like shielding electrode (18,29) is provided, positioned between the solid electrolyte body (11,25) and the insulating layer (17,31). The shielding electrode is galvanically connected to the return line (21,33) of the heating element. In accordance with one embodiment, the shielding electrode and one of the operating electrodes, for example, the sensing electrode (29), can be the same metallic film or element applied to the sensor, with an additional electrical insulation layer (32) interposed in the region between the film electrode (29) and the solid electrolyte body (25), the heater element (16,30) being positioned with the interposition of the electrical insulating layer over the film electrode in that region. Preferably, the width of the respective insulating layers decreases in a direction away from solid electrolyte body.The system is applicable both to potentiometric, as well as polarographic-type sensors, of, selectively, closed tubular or plate-like construction, with electrodes exposed either to a reference gas or having, respectively, different catalytic activity.
    • 为了扩展固体电解质离子传导型气体传感器的温度范围,特别是用于来自内燃机的废气,并且在刚好高于传感器的响应温度的温度下防止加热器元件和固体电解质体之间的漏电流,但是 低于其正常工作温度,即即使在250℃至400℃的范围内,也提供了位于固体电解质体(11,25)之间的层状屏蔽电极(18,29) 和绝缘层(17,31)。 屏蔽电极电连接到加热元件的返回线(21,33)。 根据一个实施例,屏蔽电极和操作电极中的一个,例如感测电极(29)可以是与传感器相同的金属膜或元件,其中插入有另外的电绝缘层(32) 在薄膜电极(29)和固体电解质体(25)之间的区域中,加热器元件(16,30)定位成在该区域中在电极上插入电绝缘层。 优选地,各绝缘层的宽度在远离固体电解质体的方向上减小。 该系统适用于电位计和极谱法传感器,选择性地,封闭的管状或板状结构,电极暴露于参考气体或分别具有不同的催化活性。