一种基于双固体电解质的CO_2传感器  

A New Carbon Dioxide Gas Sensor Based on Solid Bielectrolyte

作　　者：周会珠[1] 王岭[1] 王福先[2] 戴磊[1] 洪彦若[3] 

机构地区：[1]河北理工大学,河北唐山063009 [2]河北宣化钢铁公司焦化厂,河北宣化075000 [3]北京科技大学材料学院,北京100083

出　　处：《稀有金属材料与工程》2007年第A02期209-212,共4页Rare Metal Materials and Engineering

基　　金：国家自然基金(50572024);教育部归国人员基金;唐山市科技局资助项目(04364001B-10)

摘　　要：以Nasicon结合的Na-β-alumina作为固体电解质,BaCO_3-Na_2CO_3(44:56)作为辅助电极制备了CO_2传感器并检验了其性能。结果表明:在618～947 K范围内测得的传感器电动势与CO_2浓度之间成良好的线性关系,符合能斯特关系,反应的电子转移数接近2。实验了水蒸汽,O_2,NO_2和SO_2对CO_2测定的影响,结果表明,O_2、水蒸汽对CO_2传感器性能没有明显的影响:低于100×10^(-6)NO_2对传感器响应也没有造成干扰;当共存SO_2高于1.7×10^(-6)时由于在辅助电极和电解质表面生成Na_2SO_4而严重影响其性能。A CO2 gas sensor using Nasicon interfaced Na-β-alumina as solid electrolyte and BaCOa-Na2CO3 （weight ratio 44：56） as the auxiliary phase has been prepared and its properties were tested. The results show that the measured emf in CO2-air atmosphere is consistent with Nernstian law. In this paper further work has been carried out to investigate cross-sensitivity to humidity, O2, NO2 and SO2. Results have shown that humidity has no significant influence on the sensor performance. NO2 lower than 100 ppm hardly affects the sensor signal. The CO2 sensor can resist any effects from SO2 only up to a concentration of 1.7 ppm. The sensing ability is greatly limited by Na2SO4 formation on sensing electrode and surface of electrolyte when SO2 gas is in coexistence with CO2

关 键 词：CO2 固体电解质 气体传感器 干扰 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]