Defect chemistry and thermodynamic properties of proton dissolution into BaZr0.9Y0.1O3 − δ

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    Abstract

    Proton concentration in BaZr0.9Y0.1O3 − δ was measured by highly-accurate thermogravimetry as functions of temperature and p(H2O), and thermodynamic properties of the proton dissolution were discussed. Apparent Gibbs free energy change of the proton dissolution reaction changes with proton concentration even at a constant temperature. This means the proton dissolution in BaZr0.9Y0.1O3 − δ is not ideal-solution-like. The deviation from the ideal solution became more significant with increasing temperature i.e. decreasing the proton concentration. This indicated the interaction between oxygen vacancies or electron hole, dopant-defect interaction, or lattice deformation may cause the proton dissolution in BaZr0.9Y0.1O3 − δ especially at higher temperature.

    Original languageEnglish
    Pages (from-to)12-15
    Number of pages4
    JournalSolid State Ionics
    Volume303
    DOIs
    Publication statusPublished - 2017 May 1

    ASJC Scopus subject areas

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

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