SnO_2-K_2O-LiZnVO_4系材料湿敏性能及导电机理的研究  

Humidity sensitive properties and conductance mechanism of SnO_2-K_2O-LiZnVO_4 system material

作　　者：胡素梅[1] 陈海波[1] 傅刚[2] 

机构地区：[1]茂名学院技术物理系,茂名525000 [2]广州大学物理系,广州510405

出　　处：《功能材料与器件学报》2006年第4期357-360,共4页Journal of Functional Materials and Devices

基　　金：广东省科技计划项目(2002A1070304)

摘　　要：采用共沉淀法制备出SnO2-K2O-LiZnVO4系湿敏粉体,考察了液相掺杂K+对材料湿敏特性的影响,并用直流特性法对材料的导电机理进行了分析。实验结果表明,适当的K+液相掺杂可使材料具有低湿电阻小,灵敏度适中的特性。直流特性法分析表明,材料属电子-离子混合导电机制,且离子电导成分越多材料的湿敏特性越好。SnO2-K2O-LiZnVO4 system nanometer powers were prepared by co -precipitation. The influence of the liquid - doped K ^＋ on the humidity - sensitive characteristics was studied. The conductance mechanism of the material is analyzed by direct current. The experimental results show that a humidity - sensitive material with lower resistance at lower humidity and with proper humidity sensitivity can be made by appropriate liquid - doped K^＋. The analysis of the characteristics of direct current shows that the material conductance is electronics - ion and the properties of the material are better with more composition of ion conductance.

关 键 词：湿敏性能 导电机理 直流特性法 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]