Grain-boundary conduction in solid oxide electrolyte

Jong Heun Lee

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Grain-boundary conduction in the fluorite-structure solid oxide electrolytes such as acceptor-doped zirconia and ceria were reviewed. The siliceous impurity, even several hundreds ppm, affects the ionic conduction across grain boundary to a great extent. Various approaches to improve grain-boundary conduction in fluorite-structure oxide electrolytes have been investigated, which include (1) the scavenging of siliceous phase by the reaction with second phase, (2) the gathering of intergranular siliceous phase into a discrete configuration and (3) the dewetting of intergranular liquid phase by post-sintering heat treatmtent.

    Original languageEnglish
    Pages (from-to)683-689
    Number of pages7
    JournalJournal of the Korean Ceramic Society
    Volume44
    Issue number12
    DOIs
    Publication statusPublished - 2007 Dec 31

    Keywords

    • Grain-boundary conduction
    • Irnpedance spectroscopy
    • Scavenging
    • Solid oxide electrolyte
    • Solide oxide fuel cell

    ASJC Scopus subject areas

    • Ceramics and Composites

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