La_(0.68)Pb_(0.32)FeO_3纳米材料在低工作温度条件下对CO气体的气敏性研究  

Gas-sensing Properties of La_(0.68)Pb_(0.32)O_3 Nano-materials under Low Operating Temperature

作　　者：张玲[1] 胡季帆[1] 秦宏伟[1] 宋鹏[1] 蒋民华[1] 

机构地区：[1]山东大学晶体材料国家重点实验室和物理系,济南250100

出　　处：《无机材料学报》2005年第6期1385-1388,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(59772040)

摘　　要：采用sol-gel法制备了具有正交钙钛矿结构的La0.68Pb0.32FeO3和LaFeO3纳米粉体.用该粉体制成气敏元件,并测试了该粉体材料在CO气体中的气敏特性,测试结果表明: 与LaFeO3相比,La0.68Pb0.32FeO3具有更小的粒径、较大的电导值、对CO气体具有更好的气敏性能,特别是工作温度大大降低.与空气中相比,在CO气体中,材料La0.68Pb0.32FeO3 的导电激活能增大.The La0.68Pb0.32FeO3 sample with an orthogonal perovskite structure was prepared by using the sol-gel method. The gas-sensing properties were studied in CO gas. The experimental results reveal that the La0.68Pb0.32FeO3 sample shows smaller grain sizes, higher conductance and higher sensitivity to CO gas, especially the much lower operating temperature compared with LaFeO3 sample. The activation energy for La0.68Pb0.32FeO3 sample in CO gas is higher than that in air.

关 键 词：钙钛矿结构 纳米材料 气敏 

分 类 号：TB383[一般工业技术—材料科学与工程] TN304[电子电信—物理电子学]