SnO_2湿敏陶瓷伏安特性分析及其导电机理  

Current-voltage Characteristic and Conductive Mechanism of SnO_2 Humidity-sensitive Ceramic

作　　者：胡素梅[1] 陈海波[1] 

机构地区：[1]广东石油化工学院物理系,广东茂名525000

出　　处：《材料科学与工程学报》2011年第3期355-357,404,共4页Journal of Materials Science and Engineering

基　　金：广东省育苗工程项目(棒状晶粒结构纳米湿敏陶瓷材料的制备及性能研究)资助项目(201179)

摘　　要：采用共沉淀法制备出SnO2-LiZnVO4系湿敏粉体,考察了液相掺杂LiZnVO4和环境的相对湿度(RH)对材料伏安特性的影响。实验结果表明,LiZnVO4的添加量和环境的相对湿度(RH)对材料伏安特性有较大影响。当LiZnVO4添加量为10mol%时,试样伏安特性的非线性最明显,对应的感湿灵敏度也最好。高湿和低湿时的伏安特性和直流充放电特性都表明,该材料在低湿区主要导电载流子是电子;在高湿区,其主要导电载流子是离子。SnO2-LiZnVO4 system powers were prepared by co-precipitation.The influence of the amount of LiZnVO4 and relative humidity（RH） on the current-voltage characteristic was studied.The experimental results showed that the current-voltage characteristic strongly depends on the amount of LiZnVO4 and relative humidity.A humidity-sensitive SnO2 with proper humidity sensitivity can be made by doping 10mol% LiZnVO4,which shows the most evident nonlinear in current-voltage characteristic.Both the current-voltage characteristic and DC charging and discharging currents characteristic showed that the conductance is electronic at low humidity but ionic at high humidity.

关 键 词：SnO2-LiZnVO4系 伏安特性 直流充放电特性 导电机理 

分 类 号：TN304[电子电信—物理电子学]