摘要
采用化学共沉淀法和浸渍法制备了不同金属或氧化物掺杂的ＴｉＯ２气敏材料，通过透射电镜、电子衍射和ｘ射线衍射对材料的结晶形态和物相进行了分析，用静态配气法测试了气敏材料的敏感特性．结果表明：这些材料的颗粒尺寸小于０．１μｍ，８００℃处理样品为金红石型ＴｉＯ２与锐钛矿型ＴｉＯ２的混合物．通过选择合适的添加剂和工作温度可分别获得选择性酒敏元件。
The gas sensing materials TiO 2 dope with metal (Au,Ag,Pd) or metal oxides (Sn,Sb,Fe,Zn,La,Ce,Pr etc.) are made by chemical coprecipitation.The structure composition,phisical phase,ceramic microstructure of the materials are analyzed with XRD,TEM and ED.The gas sensitivity of the materials is measured in static state.The results show that the particle size of TiO 2 ceramics is lower than 0.1 μm. The specimen calcined at 800℃ is a mixture of anatase and rutite.Inflammable gas sensor,CO gas sensor or selective C 2H 5OH gas sensor can be oblained by selecting proper additives,content of additives and working temperature.
出处
《郑州轻工业学院学报》
1996年第2期83-87,共5页
Journal of Zhengzhou Institute of Light Industry（Natural Science）
基金
河南省自然科学基金
关键词
气敏电阻器
氧化钛
添加剂
敏感特性
气敏陶瓷
gas sensitive resistors
titania
superfine powder
doping
chemical coprecipitation method
