CO对氧化锆氧传感器的电性能和结构的影响  

Influences of CO Gas on the Electric Property and Construction of Zirconia Oxygen Concentration Sensor

作　　者：陈宗璋[1] 李素芳[1] 王昌贵[1] 张仲生[2] 

机构地区：[1]湖南大学化学化工系 [2]中国原子能研究院

出　　处：《湖南大学学报（自然科学版）》1992年第6期71-76,88,共7页Journal of Hunan University:Natural Sciences

摘　　要：本文用Lissajous图形法和DC电压降测阻法,分别测量了氧化锆氧传感器长时间处于700℃的CO气体中固体电解质的电导率和电极电导率的变化,实验结果表明CO气体使固体电解质的电导率和电极电导,率降低,但其变化在高温下具有可逆性.固体电解质的导电活化能增大,电极电导率与温度的关系偏离Arrhenius方程.CO影响后传感器的内壁铂和内壁锆的物相发生了变化,本文研究了CO气体影响传感器的机理,指出CO与ZrO_2基体及其电极Pt发生了反应.The changes of the solid electrolyte cond and electrode cond of Zirconia Oxygen Sensor are measured respectively by means of the Lissajous Figures method and Fall-off Potential method in CO gas for a long time at 700℃.It is shown that CO causes the deviation of the cond,but the changes are reversible at higt temperature CO also causes the activation energy increase of the solid electrolyte cond.The deviation of the relationship between the electrode cond and temperature from the Arrhenius equation,and the changes of the constituent construction of electrode and electrolyte at the inside of the cell.The mechanism of CO in- fluences on the sensor is presented,which claims that CO reacts with ZrO_2 electrolyte and Pt electrode at high temperature.

关 键 词：氧化锆 氧敏传感器 一氧化碳 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]