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Structural Studies of the Distorted Perovskite Proton Conductors Sr3Ca1+xNb2-xO9-d

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Author(s)

John Thomas Sirr Irvine, DJD Corcoran, J Canales-Vázquez

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Abstract

The family of perovskites Sr3Ca1 + xB2 - xO9 - delta (B = Zr, Ta, Nb...) offer considerable potential as proton-conducting electrolytes that are relatively resistant to carbonation. In this study, we discuss the important structural features of these oxides and demonstrate that the structures of hydrated proton-conducting oxides differ quite significantly from those of unhydrated samples. Subtle changes in unit cell symmetry due to octahedral tilting/distortion, oxygen vacancy filling/creation and cation displacements are all important features accompanying water uptake/loss and play an intrinsic role in the level of proton conduction and mechanism of proton transfer. (C) 2002 Elsevier Science B.V All rights reserved.

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Original languageEnglish
Pages (from-to)749-757
Number of pages9
JournalSolid State Ionics
Volume152-153
Publication statusPublished - Dec 2002

    Research areas

  • perovskite, Sr3Ca1-xNb2-xO9-delta, conductors, OXIDES, CERATE, BACEO3, SRCEO3, ION

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