TiO_2:Nb_2O_5混合晶体响应TMA气体敏感特性研究  

Sensitivity of TiO_2:Nb_2O_5 composite crystall oid to trimethylamine

作　　者：裴素华[1] 黄萍[1] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014

出　　处：《功能材料与器件学报》2006年第3期233-236,共4页Journal of Functional Materials and Devices

基　　金：国家自然科学基金(No.69976019)资助项目

摘　　要：利用X射线衍(XRD)、扫描电子显微镜(SEM)和器件测试等方法对TiO2:Nb2O5混合晶体结构、表面形貌及敏感机理进行分析与讨论。结果认为:Nb2O5为10%的富钛敏感材料含有大量氧空位,晶粒之间的空隙增大,显著提高了电导率和气敏特性;使器件阻值Ra降低和灵敏度K提高得到统一优化效果;为动物食品测鲜传感器研究开辟了一条新途径。The structure, morphology and sensing mechanism of TiO2 ： Nb2O5 composite crystalloid were analyzed by using X- ray diffraction （XRD） and scanning electron microscopy（SEM）. The results show that the titanium rich sample with 10% niobium has large amount of oxide vacancy and intergrain porosity augment, that enhances electrical conductivity and gas sensitivity of the material. Resistance Ra and sensitivity K of the sample are improved simultaneously. It may serve as a new way for measuring the freshness of meat and fish.

关 键 词：TiO2:Nb2O5混合晶体结构 敏感材料 TMA 

分 类 号：TN304.92[电子电信—物理电子学]