摘要
采用溶胶-凝胶法合成NASICON固体电解质及ZnSnO3复合金属氧化物材料,并以NASICON为基体材料,ZnSnO3为敏感电极制作管式SO2气体传感器。研究表明,在325～430℃时,SO2浓度在(5～50)×10-6体积分数范围内,器件的EMF值与SO2浓度的对数呈现较好的线性关系。器件在375℃时对SO2的灵敏度达到255mV/decade,并且器件在此温度下表现出较好的选择性和响应恢复特性。最后对其敏感机理进行了分析。
NASICON solid electrolyte and ZnSnO3 compound metal oxide were synthesized by Sol-Gel method. A tubular SO2 gas sensor was designed with NASICON electrolyte and ZnSnO3 auxiliary electrode. The research showed that the EMF value of the sensor was almost proportional to the logarithm of the SO2 concentration with a range of SO2 volume ratio concentration from 5×10^-6 to 50×10^-6 at 325-430℃. The sensitivity of the sensor to SO2 was 255mV/decade at 375℃. Also the sensor exhibited better selectivity and response-recovery characteristics, Finally the sensing mechanism was proposed.
出处
《传感器世界》
2008年第6期14-17,共4页
Sensor World
基金
国家自然科学基金资助项目(项目编号:60574096)
