用La2MoWO9作固体电解质的极限电流型氧传感器  

Limiting current type oxygen sensors with La_2MoWO_9 as solid electrolyte

作　　者：李丹[1] 李相虎[1] 方前锋[2] 

机构地区：[1]武汉工业学院数理科学系,湖北武汉430023 [2]中国科学院固体物理研究所材料物理重点实验室,安徽合肥230031

出　　处：《电子元件与材料》2009年第3期4-6,共3页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.50672100)

摘　　要：采用固相反应法，制备了氧离子导体La2MoWO9和混合导体La0.6Sr0.4Fe0.8Co0.2O3，并分别作为基体材料，制成了极限电流型氧传感器。利用两端子法，对氧传感器在500℃时不同氧分压下（PO2为（0～2．12）×10^4Pa）电流与电压的关系进行了测量。结果表明：用La2MoWO9作为氧传感器的固体电解质材料是可行的，即可以得到极限电流平台（PO2为1．70×10^4Pa，1为1．5mA），且极限电流与氧分压戍线性关系。The oxygen ion conductor La2MoWO9 and mixed conductor La0.6Sr0.4Fe0.8Co0.2O3 were prepared through solid phase reaction method. The limiting current type oxygen sensor was fabricated using them respectively as matrix materials. The relationship between the current and the voltage at different oxygen partial pressure （PO2 = （0-2.12）× 10^4 Pa） was measured at 500 ℃ using the standard two-probe method. The results indicate： it is feasible that the oxygen ion conductor La2MoWO9 is used as solid electrolytes of the limiting current oxygen sensors, that is, the limiting current （PO2= 1.70×10^4pa, I = 1.5 mA） can be achieved, and the relationship between the limiting current and the oxygen partial pressure is linear.

关 键 词：氧传感器 固体电解质 极限电流 氧分压 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]