| 3. | It is well known that wo3 is a conductance - type semiconductor gas sensing material , but the research on fish freshness detector with wo3 - based gas sensor to trimethylamine is still at a beginning stage . in this project , the wo3 - based gas sensors to trimethylamine are made , and their gas sensing performance are researched , especially at low temperature , the results are as follows : 1 . the nano - sized wo3 powder is prepared by sol - gel method of sodium tungstate and hydrochloric acid , and its microstructure is analyzed by using xrd , sem and tem , for material ’ s microstructure is closely related to gas sensing performance
本课题制备了wo3材料,并以它为基材,制作了三甲胺气敏传感器,研究了其对三甲胺的气敏性能,尤其是低工作温度下的气敏性能,得到结果如下: 1 、本课题以钨酸钠和浓盐酸为反应物,用溶胶凝胶法制备了纳米wo3材料,并采用x射线衍射分析仪( xrd ) ,扫描电镜( sem ) ,透射电镜( tem )对该材料进行结构分析和形貌观察,研究发现材料的微观结构与气敏性能紧密相关。 |
