中文摘要：

以Nasicon结合的Na-β-alumina作为固体电解质，BaCO3-Na2CO3（44：56）作为辅助电极制备了CO2传感器并检验了其性能。结果表明：在618-947K范围内测得的传感器电动势与CO2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，O2，NO2和SO2对CO2测定的影响，结果表明，O2、水蒸汽对CO2传感器性能没有明显的影响：低于100×10^-6 NO2对传感器响应也没有造成干扰：当共存SO2高于1．7×10^-6时由于在辅助电极和电解质表面生成Na2SO4而严重影响其性能。

英文摘要：

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