【摘要】 采用气相反应法,以纯钨丝为原料,制备了WO3粉末,又以此WO3粉末为基材,掺用溶胶--凝胶制成的TiO2,制作了H2S气敏传感元件。在性能测试中发现,该元件对浓度为10×10-6H2S的灵敏,有较高的灵敏度和较好的响应-恢复特性。文中从材料的微观结构入手,对材料的敏感机理作了分析。更多还原

【Abstract】 Using gas-state reaction,Nanometer WO₃ was synthesized by gasstate reaction with tungsten filament, WO₃ mixed with TiO₂ made by Sol-gel method was made up into gas-sensor to H₂S.The gas-sensing measurement results revealed that these sensors with a certain sensitivity put into H₂S gas of density （ about 10 -6 ） and present good response-recovery characteristics.By analyzing micro-structure of the material, the mechanism of these sensors was discussed.更多还原