NASICON固体电解质NH_3传感器的研制  

NH_3 Gas Sensor based on NASICON Solid-electrolyte

作　　者：梁喜双[1] 钟铁钢[1] 刘凤敏[1] 全宝富[1] 

机构地区：[1]集成光电子国家重点实验室吉林大学实验区吉林大学电子科学与工程学院,长春130012

出　　处：《功能材料与器件学报》2009年第4期355-359,共5页Journal of Functional Materials and Devices

基　　金：国家自然科学基金资助项目(60574096);吉林大学"985工程"研究生创新基金资助项目(20080221)

摘　　要：本文介绍了一种管式结构的固体电解质NH3传感器。该传感器是将溶胶-凝胶法制备的NASICON为导电层材料,以掺杂C的Cr2O3为辅助电极材料制得的。当工作温度在250～450℃时,器件对浓度为(50-500)×10-6的NH3表现出了良好的气敏性能,器件电动势EMF值与NH3浓度的对数表现出了很好的线性关系,在350℃时,器件的灵敏度为89 mV/decade。同时,器件表现出较快的响应恢复速度,对50×10-6的NH3的响应恢复时间分别为30 s和60 s,且有较好的选择性。A compact tubular sensor based on NASICON （sodium super ionic conductor） and carbon - doped Cr2O3 sensing electrode was designed for the detection of ammonia. The sensor gave excellent sensing properties to 50 - 500 ×10^-6 ammonia in air at 250 - 450℃. The EMF value of the sensor was almost proportional to the logarithm of ammonia concentration, the sensitivity （slope） was 89 mV/decade at 350℃. The sensor had speedy response kinetics to ammonia, the 90% response time to 50 ×10^-6 ammonia was 30 s, and the recovery time was 60 s. It was also seen that the sensor showed a good selectivity to ammonia.

关 键 词：NH3 NASICON CR2O3 气体传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]