Dimensional instability of doped lanthanum chromite

Timothy R. Armstrong, Jeffry W. Stevenson, Larry R. Pederson, Paige E. Raney

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    99 Citations (Scopus)

    Abstract

    Lattice expansion, phase stability, and dimensional stability of doped lanthanum chromites have been examined over a wide range of temperatures and oxygen partial pressures. Reduction of doped lanthanum chromite resulted in a linear expansion of the sample that was dependent on the acceptor (Sr, Ca) concentration, temperature, oxygen partial pressure, and oxygen content within the sample. Additional doping with aliovalent B-site additives significantly reduced lattice expansion in reducing environments. The lattice expansion in reducing environments was directly related to the loss of lattice oxygen and the simultaneous reduction of Cr4+ to Cr3+ to maintain electroneutrality.

    Original languageEnglish
    Pages (from-to)2919-2925
    Number of pages7
    JournalJournal of the Electrochemical Society
    Volume143
    Issue number9
    DOIs
    Publication statusPublished - Sep 1996

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    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Renewable Energy, Sustainability and the Environment
    • Surfaces, Coatings and Films
    • Electrochemistry
    • Materials Chemistry

    Cite this

    Armstrong, T. R., Stevenson, J. W., Pederson, L. R., & Raney, P. E. (1996). Dimensional instability of doped lanthanum chromite. Journal of the Electrochemical Society, 143(9), 2919-2925. https://doi.org/10.1149/1.1837127