采用了一种新的有效工艺,制备出了以8mol％Y2O3稳定的ZrO2为固体电解质基体材料,以La0.8Sr0.2MnO3混合导体材料为致密扩散障碍层的极限电流型氧传感器,避免了YSZ和LSM两种材料在烧结时收缩率不匹配的问题,且能够很好给出全范围空燃比的极限电流.该传感器与以往的极限电流型传感器相比具有结构简单,响应更快,工作稳定,成本低廉等优点,有很好的应用前景.
A new type of limiting current oxygen sensor using yttria (8mol%) stabilized zirconia (YSZ) as oxygen ion
conducting solid electrolytes and La0.8Sr0.2MnO3 (LSM) as diffusion barrier was developed successfully through a new and effective technology.
This new technology avoids the problem that the sintering shrinkage percentages of YSZ and LSM are different with each other. The oxygen sensor
made by this technology displays excellent characteristics from 0% oxygen concentration to ambient air oxygen partial pressure, and offers a
simpler design, a shorter response time, a long term working stability and a potentially lower cost than existing limiting current oxygen sensors.
参考文献
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