氧化铈掺杂SrCoO_(3-δ)的结构与电导性能  

Structure and electrical properties of SrCoO_ ( 3-δ)doped with CeO_2

作　　者：魏楸桐[1] 郭瑞松[1] 王凤华[1] 陈玉如[1] 刘文西[1] 

机构地区：[1]天津大学先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《兵器材料科学与工程》2004年第2期36-38,42,共4页Ordnance Material Science and Engineering

基　　金：8 63项目 2 0 0 1AA3 2 3 0 90和 2 0 0 2AA5 170 13资助

摘　　要：采用固相反应法合成了Sr1-xCexCoO3 -δ(x =0 .0 5～ 0 .2 )阴极材料 ,并研究了其结构和电导性能。XRD图谱表明SrCoO3 -δ体系中CeO2 固溶量为 10 %～ 15 % (质量分数 ) ,且随着氧化铈含量的增加体系稳定性略有降低 ,晶胞出现收缩。当氧化铈的掺杂量为 15 %时的电导率高于其它固溶量的组分 ,在 35 0～ 4 0 0℃达到最高值 ,超过了5 0 0S/cm ,满足了作为低温SOFC阴极材料的电学性能的要求。Sr 1-xCe xCoO 3-δ(x = 0.05～0.2) cathode materials were synthesized by solid reaction method. Their structure and electrically conducting performances were investigated. The solution content of CeO 2 in SrCoO 3-δwas 10%～15% as demonstrated by XRD. It was also shown that the stability of Sr 1-xCe xCoO 3-δ decreased slightly and crystal cell volume calculated from the XRD data contracted with increasing amount of CeO 2 dopant. The electrical conductivity over 500 S/cm was obtained at x = 0.15, which was higher than that of other compositions. It meant that this material could fulfill the requirements in electrical properties applied to lower temperature SOFC.

关 键 词：SrCoO3-δ 阴极材料 固相反应 相结构 电导率 Ce02掺杂 

分 类 号：TM911.4[电气工程—电力电子与电力传动]