固体电解质硫化氢气体传感器的特性研究

采用溶胶-凝胶法制备NASICON(钠离子导体)固体电解质及镍/钛复合氧化物材料。并以NASICON为离子导电层,镍/钛复合氧化物为敏感电极制作固体电解质硫化氢气体传感器。在260-380℃温度范围内,以镍/钛复合氧化物为敏感电极制作的器件对1.10-6～100.10-6硫化氢具有良好的敏感特性。在320℃时器件的灵敏度(斜率)为-72.4mV/decade。并且器件具有良好的选择性、抗湿性及响应恢复特性。器件对5.10-6,50.10-6硫化氢的响应时间为10s,4s和20s,40s。最后对器件的敏感机理做了分析。

Study on characteristics of NASICON solid-electrolyte H2S gas sensor

NASICON (sodium super ionic conductor) solid-electrolyte and Ni/Ti compound oxide materials were prepared by sol-gel method. And solid-electrolyte H2S gas sensor was fabricated with NASICON as the ion electric layer and Ni/Ti compound oxide as the sensing electrode. The sensor using Ni/Ti compound oxide as the sensing electrode exhibited well sensing performances to (1-100)/ 10-6 H2S at 260-380 °C. The sensitivity (slope) of the sensor was -72.4 mV/decade at 320 °C. Also the sensor exhibited well selectivity, resistance against water humidity and response-recovery characteristics. The response and recovery time of the sensor to (5, 50)/10-6 H2S were 10 ,4 s and 20 ,40 s, respectively. At last the sensing mechanism of the sensor was investigated.