摘要
研究以单个SnO2 传感器为敏感元件对CO进行动态检测 ;讨论了SnO2 气体传感器动态检测方法的理论基础。结果表明 ,运用动态检测方法明显提高了SnO2 传感器对CO的选择性 ,动态检测方法是建立在半导体电导率温度依赖特性基础上的。
The gas sensing behavior of a single SnO_2 sensor was investigated in detecting carbon monoxide gas based on a dynamic measurement method in which temperature was modulated by heating waveform and frequency. The set of devices of detecting carbon monoxide gas and the whole operating processing was illuminated. The selectivity to carbon monoxide detecting of the SnO_2 gas sensor was raised by the dynamic measurement method. Finally, the mechanism of dynamic measurement was given based on the relation between electric conductivity of semiconductor material and concentration and mobility of charge carrier (electron and hole).
出处
《传感技术学报》
CAS
CSCD
北大核心
2005年第1期53-56,62,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金 (6 0 2 74 0 6 1)
安徽省自然科学基金 (0 10 4 14 0 4 )资助项目
