High-temperature ion transport in La1-xSrxFeO 3-δ

Julia A. Bahteeva, Ilia A. Leonidov, Mikhail V. Patrakeev, Edward B. Mitberg, Victor L. Kozhevnikov, Kenneth R. Poeppelmeier

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The conductivity of the entire solid solution La1-xSr xFeO3-δ, where x = 0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10-19 to 0.5 atm and temperatures between 750 and 950°C is reported. The analysis of the isothermal pressure dependences of the conductivity reveal that the lanthanum-strontium ferrites can be characterized as mixed ion-electron conductors in the low-oxygen pressure/high-oxygen deficiency limit. The partial contribution to conductivity from oxygen ions increases with strontium content and attains a maximal value at x = 0.5. Further increase in doping results in the development of oxygen vacancy ordering phenomena and deterioration of the conducting properties.

Original languageEnglish
Pages (from-to)578-584
Number of pages7
JournalJournal of Solid State Electrochemistry
Volume8
Issue number9
Publication statusPublished - Aug 1 2004

Keywords

  • Electron conductivity
  • Lanthanum-strontium ferrite
  • Oxygen conductivity
  • Oxygen-vacancy ordering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

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