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High-temperature ion transport in La1−x Sr x FeO3−δ

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Abstract

The conductivity of the entire solid solution La1−x Sr x FeO3−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.

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Acknowledgements

The work was carried out under contract 01-03-96519 with the Russian Foundation for Basic Research (RFBR). The authors appreciate partial support of this study by the NATO SfP Program under award 978002. One of us (K.R.P) is grateful to the EMSI program of the National Science Foundation and the U.S. Department of Energy Office of Science (CHE-9810378) at the Northwestern University Institute for Environmental Catalysis.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Branch of RAS, Pervomaiskaia 91, 620219, Ekaterinburg , Russia

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

  2. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL , 60208, USA

    Kenneth R. Poeppelmeier

Authors
  1. Julia A. Bahteeva
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  2. Ilia A. Leonidov
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  3. Mikhail V. Patrakeev
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  4. Edward B. Mitberg
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  5. Victor L. Kozhevnikov
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  6. Kenneth R. Poeppelmeier
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Corresponding author

Correspondence to Victor L. Kozhevnikov.

Additional information

Presented at the OSSEP Workshop “Ionic and Mixed Conductors: Methods and Processes”, Aveiro, Portugal, 10–12 April 2003

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Bahteeva, J.A., Leonidov, I.A., Patrakeev, M.V. et al. High-temperature ion transport in La1−x Sr x FeO3−δ . J Solid State Electrochem 8, 578–584 (2004). https://doi.org/10.1007/s10008-003-0486-5

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  • DOI: https://doi.org/10.1007/s10008-003-0486-5

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