La_(0.2)Ba_(0.8)Co_(0.8)Fe_(0.2-x)Zr_xO_(3-δ)陶瓷的相组成与导电性能  

Phase Compositions and Electrical Properties of La_(0.2)Ba_(0.8)Co_(0.8)Fe_(0.2-x)Zr_xO_(3-δ) Ceramics

作　　者：吴日铭[1] 樊传刚[1] 朱思伟[1] 刘邦武[2] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]北京科技大学材料物理与化学系,北京100083

出　　处：《安徽工业大学学报（自然科学版）》2009年第1期49-52,共4页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金重点项目(50332040)

摘　　要：用固相反应法制备了La0.2Ba0.8Co0.8Fe0.2-xZrxO3-δ(x≤0.10)系列陶瓷样品(简称LBCFZ),对其相组成和电性能进行了表征。研究表明,常温下的LBCFZ为立方钙钛矿相结构,且当0≤x≤0.08时,其晶胞常数随着Zr掺杂量的增加而线性增大。LBCFZ陶瓷样品的电导率随温度的变化存在明显的转变温度(Tp):当温度低于Tp时,样品的电导率随着温度升高而增大;当温度高于Tp时,样品的电导率随着温度升高而减小。另外,LBCFZ样品(x=0.02的样品例外)随着Zr含量的增加,电导率减小,转变温度Tp降低。The ceramic samples of La0.2Ba0.8Co0.8Fe0.2-xZrxO3-δ（LBCFZ,x≤ 0.10） were prepared by solid state reaction route, and their phase compositions and electrical properties were characterized. It was found that the obtained LBCFZ ceramic samples present a cubic perovskite structure, whose lattice parameters increase linearly with the content of Zr dopant. There exists an apparent abrupt changing temperature （Tp） in the relationship of electrical conductivity （σ） versus the temperature in the measuring region. The σ values increase with the elevated temperatures in the temperature range lower than Tp, and decrease in the temperature range higher than Tp. The o＂ and Tp of the resulting LBCFZ samples except the sample of x=0.02 decrease with the increase in Zr content.

关 键 词：混合导电 钙钛矿型氧化物 相组成 固相反应 电导 

分 类 号：TQ174[化学工程—陶瓷工业]