Study on the structural and electrical properties of Sr1-xCexMnO3-α (x = 0.1, 0.3) perovskite oxide

Shinichi Hashimoto, Hiroyasu Iwahara

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We found that the partial substitution of Ce for Sr in SrMnO3 could stabilize the perovskite-type structure and made the conductivity increase. In the present study, the structural and electrical properties of Sr0.9Ce0.1MnO3-α were investigated by referring to those of Sr0.7Ce0.3MnO3-α· Sr0.9Ce0.1MnO3-α showed the first-order transition from tetragonal to cubic at about 55°C, at which a drastic change in the conductivity occurred. Above this temperature, the conductivity became very high, about 450 S·cm-1 at 150°C and 270 S·cm-1 at 800°C. In contrast, Sr0.7Ce0.3MnO3-α did not exhibit a drastic phase transition like that in the case of Sr0.9Ce0.1MnO3-α. The thermal expansion rate of Sr0.9Ce0.1MnO3-α was influenced by the phase transition, but the displacement observed by thermo-mechanical analysis (TMA) was slight at the phase transition temperature. The chemical compatibility of Sr0.9Ce0.1MnO3-α with CeO2-based solid electrolyte was quite good at the fabrication temperature.

Original languageEnglish
Pages (from-to)2253-2262
Number of pages10
JournalMaterials Research Bulletin
Volume35
Issue number14-15
DOIs
Publication statusPublished - 2000 Jan 1

Keywords

  • A. Oxides
  • C. X-ray diffraction
  • D. Electrical properties
  • D. Phase transitions
  • D. Thermal expansion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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