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

Elena Konysheva, John Thomas Sirr Irvine, Astrid Besmehn

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1432-1435
Number of pages4
JournalSolid State Ionics
Volume179
Issue number27-32
Early online date10 Mar 2008
DOIs
Publication statusPublished - 30 Sept 2008

Keywords

  • perovskites
  • electrical conductivity
  • solid oxide fuel cell
  • semiconducting-metallic transition
  • STRUCTURE REFINEMENT
  • CATHODE MATERIAL
  • PHASE
  • STABILITY
  • POWDER

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