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    • 7. 发明授权
    • Oxygen sensor
    • 氧传感器
    • US4762605A
    • 1988-08-09
    • US008655
    • 1987-01-30
    • Takeo TanakaKeisuke SugimotoYuji SugiyamaHideo ShiraishiTeizo TakahamaMasahiko Masuda
    • Takeo TanakaKeisuke SugimotoYuji SugiyamaHideo ShiraishiTeizo TakahamaMasahiko Masuda
    • C04B35/48C04B35/64G01N27/407G01N27/409G01N27/413G01N27/416H05B3/18G01N27/58
    • G01N27/4071G01N27/4072
    • A limited current type oxygen sensor comprises a solid electrolyte element formed from material having high oxygen-ion conductivity such as yittria-stabilized zirconia. Electrodes are provided on the top surface and the bottom surface of the element and are formed by calcining a mixture of small ceramic particles that are relatively sinter-retardant as compared with oxygen-ion conducting ceramics, of 200 .ANG. in average particle size fine precious metal particles, and a binder. A cover is provided over the second electrode and the cover includes at least one diffusion orifice that permits ambient gas to diffuse toward the second electrode. The dry-gas-based and humid-gas-based oxygen content of the gas is determined by applying a first voltage less than the theoretical water decomposition voltage and a second voltage greater than the theoretical water decomposition voltage to the electrodes to generate corresponding currents associated with the oxygen-ions which flow through the electrolyte element between the first electrode and the second electrode. A heater may be buried in the electrolyte element to increase the flow rate of oxygen ions between the electrodes.
    • 有限电流型氧传感器包括由具有高氧离子传导性的材料形成的固体电解质元件,例如氧化钇稳定的氧化锆。 电极设置在元件的顶表面和底表面上,通过煅烧与氧离子传导陶瓷相比具有相对阻燃性的小陶瓷颗粒的混合物形成,平均粒度细的贵金属为200埃 颗粒和粘合剂。 覆盖物设置在第二电极上方,并且盖包括允许环境气体朝向第二电极扩散的至少一个扩散孔。 通过向电极施加小于理论水分解电压的第一电压和大于理论水分解电压的第二电压来确定气体的干气基和湿气基氧含量,以产生相应的电流 其中氧离子在第一电极和第二电极之间流过电解质元件。 加热器可以被埋在电解质元件中以增加电极之间的氧离子的流速。