Short-range structure of proton-conducting BaM0.10Zr0.90O2.95 (M = Y, In, Sc and Ga) investigated with vibrational spectroscopy

Maths Karlsson, Istaq Ahmed, Aleksandar Matic, Sten G. Eriksson

    Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

    Abstract

    The short-range structures of hydrated and dry samples of the proton-conducting, cubic-structured, acceptor-doped perovskites BaM0.10Zr0.90O2.95 (M=Y, In, Sc and Ga), and, for comparison, BaZrO3, have been investigated using infrared and Raman spectroscopy. The results show that the acceptor-doping leads to local structural distortions of the average cubic structure, most likely related to tilts of (M/Zr)O-6 octahedra, and that the distortions are most pronounced in the Ga-doped material for which we also find additional distortions upon hydration. For the Y-, In- and Sc-doped equivalents the distortions are somewhat weaker and hydration is found to have a reversed, although weak, effect. A comparison of the spectroscopic results to the reported proton diffusivities of the investigated materials would suggest that the much lower proton diffusivity in the Ga-doped material is associated to its stronger structural distortions. (C) 2009 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Title of host publicationSolid State Ionics
    PublisherElsevier
    Pages126-129
    Volume181
    DOIs
    Publication statusPublished - 2010
    Event14th International Conference on Solid State Protonic Conductors (SSPC-14) - Kyoto, Japan
    Duration: 2008 Sept 72008 Sept 11

    Publication series

    Name
    Number3-4
    Volume181
    ISSN (Print)1872-7689
    ISSN (Electronic)0167-2738

    Conference

    Conference14th International Conference on Solid State Protonic Conductors (SSPC-14)
    Country/TerritoryJapan
    CityKyoto
    Period2008/09/072008/09/11

    Subject classification (UKÄ)

    • Natural Sciences
    • Physical Sciences

    Free keywords

    • Raman spectroscopy
    • Proton-conducting
    • Perovskite
    • Infrared spectroscopy

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