BaCe_(1-x)Mn_xO_3材料的制备和电性能研究  

Investigation on Preparation and Electrical Properties of BaCe_(1-x)Mn_xO_3

作　　者：刘魁[1] 周会珠[2] 戴磊[2] 吴印林[2] 李跃华[2] 赵艳琴[2] 庄威伟 王岭[2] 

机构地区：[1]河北科技大学,石家庄050000 [2]河北理工大学,唐山063009

出　　处：《人工晶体学报》2009年第S1期155-158,163,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金资助项目(50772030)

摘　　要：采用高温固相法制备了BaCe1-xMnxO3-δ(x=0.05~0.30)。运用X射线衍射(XRD)和扫描电子显微镜(SEM)分别对BaCe1-xMnxO3-δ系列试样的物相结构和微观形貌进行了表征,并应用IM6e型电化学工作站测定了不同温度(250~800℃)下试样的交流阻抗谱。结果表明:x=0.05~0.10样品为钙钛矿型单相结构,x=0.10~0.30时样品中有第二相Ba2MnO3形成。在1500℃烧结的样品,随着Mn2+掺杂浓度的增大,试样的致密性有所提高,试样的电导率增大。当x=0.30时,BaCe0.7Mn0.3O3-δ试样在空气气氛800℃电导率达1.14×10-3S.cm-1。BaCe1-xMnxO3-δ(x=0.05-0.30) were prepared by high temperature solid state reaction method.The phase composition and microstructure of BaCe1-xMnxO3-δwere characterized by XRD and SEM.Ac impedance spectroscopy at fifferent temperature(250-800 ℃) was determined by IM6e electrochemical station.The experimental results showed that when x at the range of 0.05-0.10.The phase composition of samples are pure perovskite;when x is various from 0.10 to 0.30,the second phase Ba2MnO3 appeared.Density and electrical conductivity of samples sintered at 1500 ℃ increased as the dopant Mn2+ concentration increasing.The electrical conductivity of BaCe0.7Mn0.3O3-δ(x=0.3) sintered at 1500 ℃ could up to 1.14×10-3 S·cm-1 at 800 ℃.

关 键 词：BaCe1-xMnxO3 电导率 质子导体 混合导体 

分 类 号：O614.233[理学—无机化学]