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

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

Structural Studies of the Distorted Perovskite Proton Conductors Sr₃Ca_1+xNb_2-xO_9-d

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

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	749-757
Number of pages	9
Journal	Solid State Ionics
Volume	152-153
Publication status	Published - Dec 2002

Keywords

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

Cite this

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title = "Structural Studies of the Distorted Perovskite Proton Conductors Sr3Ca1+xNb2-xO9-d",

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.",

keywords = "perovskite, Sr3Ca1-xNb2-xO9-delta, conductors, OXIDES, CERATE, BACEO3, SRCEO3, ION",

author = "Irvine, {John Thomas Sirr} and DJD Corcoran and J Canales-V{\'a}zquez",

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T1 - Structural Studies of the Distorted Perovskite Proton Conductors Sr3Ca1+xNb2-xO9-d

AU - Irvine, John Thomas Sirr

AU - Corcoran, DJD

AU - Canales-Vázquez, J

PY - 2002/12

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N2 - 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.

AB - 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.

KW - perovskite

KW - Sr3Ca1-xNb2-xO9-delta

KW - conductors

KW - OXIDES

KW - CERATE

KW - BACEO3

KW - SRCEO3

KW - ION

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M3 - Article

SN - 0167-2738

VL - 152-153

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JO - Solid State Ionics

JF - Solid State Ionics

ER -

Structural Studies of the Distorted Perovskite Proton Conductors Sr₃Ca_1+xNb_2-xO_9-d

Abstract

Keywords

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