CO气体传感器的研究  

Study on CO gas sensor

作　　者：周明[1] 田彦文[2] 王常珍[2] 

机构地区：[1]吉林师范大学计算机学院,吉林四平136000 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《传感器与微系统》2009年第10期49-51,共3页Transducer and Microsystem Technologies

摘　　要：为检测空气中CO的体积分数,以LaF3(掺杂5%CaF2)单晶作为固体电解质,CaCO3,CaO作为参比电极,不同CO体积分数的空气为待测电极构成敏感浓差电池。在不同温度和不同CO体积分数条件下,对电池两极电动势(EMF)进行测量。实验发现,电池EMF与CO体积分数对数呈线性关系;电池的响应时间小于15 s。从测量得到的阻抗谱图,发现LaF3(掺杂5%CaF2)单晶具有较高的离子电导率。To measure the volume fraction of CO in the air , a electrolyte sensor is prepared with CaCO3 , CaO as the reference electrode,single-crystal LaF3 （5 % CaF2 ） as the electrolyte and the air with CO as the sensitive electrode. The electro-motive force（EMF） experiments about the sensor is carried out under lower temperature. At given temperature, the relationship between EMF and logarithmic transformation of volume fraction of CO is better linear. The response time of the sensor is shorter than 15 s. It can be seen from the Z-PLOT that single-crystal LaF3 （5 % CaF2 ） has a high ion conductivity.

关 键 词：LAF3 CO 气体传感器 阻抗谱 离子电导率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]