【摘要】 采用浸渍法在Ce0.9Gd0.1O1.95(CGO)固体电解质骨架中制备敏感材料SnO2,并组装成氢气传感器。利用XRD、SEM对氢气传感器的相组成及微观形貌进行表征,采用IM6e型电化学工作站对传感器气敏性能进行测试。结果表明浸渍法制备的敏感材料SnO2颗粒细小,约为400nm左右;在400~550℃时,传感器阻抗值随氢浓度的增加而减小,且传感器信号与氢气浓度表现出非常良好的线性关系。随着温度升高,传感器的信号响应速度逐渐增加,在550℃、氢浓度为1.0×10-3时,其90%的响应时间为170s。更多还原

【Abstract】 The sensing material SnO2 was made in the framework of the solid electrolyte Ce0.9Gd0.1O1.95(CGO) by using the infiltrating way,and hydrogen sensors were fabricated.The morphology and phase composition of hydrogen sensors were observed by XRD and SEM.The gas sensing properties of the sensors were measured by IM6e electrochemical workstation.The results showed that the particle size of sensing material SnO2 was about 400nm.The impedances of sensors obviously were decreasing with increasing H2 concentrations at 400-550℃.The sensors response and H2 concentrations showed good linear relationship.The response signal rate of sensors was gradually promoting with increasing temperatures.At 550℃,90% response time of sensors signal was about 170s with H2 concentrations at 1.0×10-3.更多还原