Effect of partial substitution of in by Zr, Ti and Hf on protonic conductivity of BaInO2.5

Naoki Hideshima, Kenichi Hashizume

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    The effect of partial substitution of In by Zr, Ti and Hf in BaInO 2.5 has been studied in order to improve its protonic conductivity. The isotope effect of H and D on the protonic conductivity has also been studied, which indicates that hydrogen diffusion is a rate-limiting process for the protonic conduction. Although the contents of substituting elements do not correlate well with the variation of the protonic conductivity, a 'free volume', which is usually introduced to interpret changes of the conductivity of oxide ion conductors, can do well. This suggests the free volume could be used as a figure of merit to improve the protonic conductivity in BaInO2.5 based oxides.

    Original languageEnglish
    Pages (from-to)1659-1664
    Number of pages6
    JournalSolid State Ionics
    Volume181
    Issue number37-38
    DOIs
    Publication statusPublished - Dec 13 2010

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

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