Electrical conductivity and structure of solid solutions formed in the La0.8Sr0.2MnO3-La0.95Ni0.6Fe0.4O3 system

摘要：

The transport properties and structure of the solid solutions formed in the (100-x) La0.8Sr0.2MnO3 (LSM)-x La0.95Ni0.6Fe0.4O3 (LNF) system were studied for the first time. The parent LSM and LNF perovskites and the solid solutions formed in the concentration ranges x < 30 and 70 ≤ X ≤ 100 exhibited a rhombohedral structure. The unit cell volume of these solid solutions decreases with increasing LNF content. Formation of a new phase with an orthorhombic symmetry was observed in the concentration range 35 ≤ x ≤ 70. Lower transport properties of the (100-x) LSM-xLNF, 43 ≤ x ≤ 53, compositions as compared to the parent LSM and LNF perovskites can be explained with the formation of a new phase with orthorhombic structure. The (100-x)LSM-xLNF single phase perovskites possess metallic type of conductivity in a narrow concentration and temperature range.

关键词： Perovskites Electrical conductivity Solid ozide fuel cell Semiconducting-metallic transition

作者: Elena Konysheva John T.S.Irvine Astrid Besmehn

作者单位: School of Chemistry, University of St Andrews, St Andrews, Fife, KY 16 9ST, UK Central Division of Analytical Chemistry, Research Centre Juelich, 52425 Juelich, Germany

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 1432-1435

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）