Processing and electrical properties of alkaline earth-doped lanthanum gallate

J. W. Stevenson, T. R. Armstrong, D. E. McCready, L. R. Pederson, W. J. Weber

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    Abstract

    Alkaline earth-doped lanthanum gallate powders were prepared by glycine/nitrate combustion synthesis. Compacts of powders synthesized under fuel-rich conditions were sintered to densities greater than 97% of theoretical. Appropriate doping with Sr or Ba on the A-site of the perovskite structure, and Mg on the B-site, resulted in oxygen ion conductivity higher than that of yttria-stabilized zirconia (YSZ), and high ionic transference numbers. Doping with Ca and Mg resulted in lower conductivity than YSZ. Thermal expansion coefficients of the doped gallates were higher than that of YSZ.

    Original languageEnglish
    Pages (from-to)3613-3620
    Number of pages8
    JournalJournal of the Electrochemical Society
    Volume144
    Issue number10
    DOIs
    Publication statusPublished - Oct 1997

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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

    Stevenson, J. W., Armstrong, T. R., McCready, D. E., Pederson, L. R., & Weber, W. J. (1997). Processing and electrical properties of alkaline earth-doped lanthanum gallate. Journal of the Electrochemical Society, 144(10), 3613-3620. https://doi.org/10.1149/1.1838057