High-temperature phase equilibria in the oxide systems SrFe 1-xGaxO2.5-SrFe1- xGaxO3 (x = 0, 0.1, 0.2)

I. A. Leonidov, M. V. Patrakeev, J. A. Bahteeva, E. B. Mitberg, V. L. Kozhevnikov, P. Colomban, K. R. Poeppelmeier

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Abstract

X-ray powder diffraction, Raman scattering, equilibrium oxygen content and conductivity data are combined to construct high-temperature phase diagrams (T vs. δ) for the oxide systems SrFe1-xGa xO2.5-SrFe1-xGaxO 3, where x=0, 0.1, and 0.2. Depending on oxygen content and gallium doping, three different structural types are shown to exist at high temperatures including cubic perovskite-, cubic brownmillerite-, and orthorhombic brownmillerite-type structures. Substitution of gallium for iron is shown to extend the oxygen content and temperature limits where the cubic brownmillerite-type phase is stable.

Original languageEnglish
Pages (from-to)1093-1099
Number of pages7
JournalJournal of Solid State Chemistry
Volume179
Issue number4
DOIs
Publication statusPublished - Apr 1 2006

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Keywords

  • Conductivity
  • Oxygen content
  • Phase diagrams
  • Strontium ferrite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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