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, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 2006

Fingerprint

Phase equilibria
Oxides
Gallium
Oxygen
gallium
oxides
oxygen
Perovskite
X ray powder diffraction
Temperature
Phase diagrams
Raman scattering
Substitution reactions
Iron
Doping (additives)
phase diagrams
substitutes
Raman spectra
iron
conductivity

Keywords

  • Conductivity
  • Oxygen content
  • Phase diagrams
  • Strontium ferrite

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

High-temperature phase equilibria in the oxide systems SrFe 1-xGaxO2.5-SrFe1- xGaxO3 (x = 0, 0.1, 0.2). / Leonidov, I. A.; Patrakeev, M. V.; Bahteeva, J. A.; Mitberg, E. B.; Kozhevnikov, V. L.; Colomban, P.; Poeppelmeier, Kenneth R.

In: Journal of Solid State Chemistry, Vol. 179, No. 4, 04.2006, p. 1093-1099.

Research output: Contribution to journalArticle

Leonidov, I. A. ; Patrakeev, M. V. ; Bahteeva, J. A. ; Mitberg, E. B. ; Kozhevnikov, V. L. ; Colomban, P. ; Poeppelmeier, Kenneth R. / High-temperature phase equilibria in the oxide systems SrFe 1-xGaxO2.5-SrFe1- xGaxO3 (x = 0, 0.1, 0.2). In: Journal of Solid State Chemistry. 2006 ; Vol. 179, No. 4. pp. 1093-1099.
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AU - Leonidov, I. A.

AU - Patrakeev, M. V.

AU - Bahteeva, J. A.

AU - Mitberg, E. B.

AU - Kozhevnikov, V. L.

AU - Colomban, P.

AU - Poeppelmeier, Kenneth R

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AB - 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.

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