具有LSM致密扩散障碍层的片式极限电流型氧传感器  

Limiting Current Oxygen Sensors with LSM as Dense Diffusion Barrier

作　　者：夏晖[1] 李福燊[1] 吴卫江[1] 杨媚[1] 李丽芬[1] 

机构地区：[1]北京科技大学无机非金属材料系,北京100083

出　　处：《无机材料学报》2004年第2期411-416,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50272009)

摘　　要：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.

关 键 词：固体电解质 氧传感器 极限电流 致密扩散障碍层 空燃比 La0.8Sr0.2MnO3混合导体材料 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]