Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ)混合导体材料的电子–离子阻抗行为  

Electronic–ionic Impedance Behavior of Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ) As Mixed Conductor

作　　者：单科[1,2] 翟凤瑞[1,2] 谢志鹏[3] 易中周[1,2] 

机构地区：[1]红河学院理学院,云南蒙自661199 [2]云南省高校"地方特色资源利用与新材料"重点实验室,云南蒙自661199 [3]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《硅酸盐学报》2016年第3期438-443,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51562009;51362011);云南省应用基础研究计划(C0120150498)资助

摘　　要：采用溶胶–凝胶法制备Y_0.08Sr_0.92Ti_1–xFe_xO_3–δx=0.2,0.3,0.4,0.5）混合导体材料,用X射线衍射（XRD）分析该材料的物相组成,采用交流阻抗法和电子阻塞电极法分别测定材料的总电导率与离子电导率,研究铁含量对Y_0.08Sr_0.92Ti_1–xFe_xO_3–δ合导体材料的结构、电性能及阻抗行为的影响。结果表明：样品均为单一立方相钙钛矿结构;在测试温度范围内,随Fe掺杂量增加,Y_0.08Sr_0.92Ti_1–xFe_xO_3–δ总电导率和离子电导率都随着温度的升高而增大。800℃以下,Y_0.08Sr_0.92Ti_1–xFe_xO_3–δx=0.2,0.3,0.4,0.5）的总电导率为0.017~0.110 S·cm–1,离子电导率为0.010~0.024 S·cm–1。A single phase perovskite ceramic of Y0.08Sr0.92Til0xFexO3-δ（x = 0.2, 0.3, 0.4, 0.5） was synthesized by a sol-gel method. The mixed ionic-electronic conductivity as a function of Fe content was investigated. The phase composition was analyzed by X-ray diffraction. The total electrical and oxygen ionic conductivities of Y0.08Sr0.92Ti1_xFexO3-δ ceramic were investigated by AC impedance spectroscopy and electron-blocking electrode, respectively. The total total electrical and ionic conductivities of Y0.08Sr0.92Ti1_xFex03-δ increase significantly with increasing Fe-doping amount and temperature. The total electrical conductivity and ionic conductivity of Y0.08Sr0.92Ti1-xFexO3-δ are 0.017-0.110 and 0.010-0.024 S·cm-1, respectively.

关 键 词：钛酸锶 电导率 离子电导率 阻抗 

分 类 号：TQ174[化学工程—陶瓷工业]