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

Karlsson, Maths LU ; Ahmed, Istaq; Matic, Aleksandar and Eriksson, Sten G. (2010) 14th International Conference on Solid State Protonic Conductors (SSPC-14) In Solid State Ionics 181(3-4). p.126-129
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Raman spectroscopy, Proton-conducting, Perovskite, Infrared spectroscopy
in
Solid State Ionics
volume
181
issue
3-4
pages
126 - 129
publisher
Elsevier
conference name
14th International Conference on Solid State Protonic Conductors (SSPC-14)
external identifiers
  • wos:000276706600007
  • scopus:77649182337
ISSN
1872-7689
0167-2738
DOI
10.1016/j.ssi.2009.03.020
language
English
LU publication?
yes
id
65286720-6032-411f-96e0-1b8f6d801624 (old id 1601939)
date added to LUP
2010-05-19 11:08:34
date last changed
2018-07-15 03:19:00
@inproceedings{65286720-6032-411f-96e0-1b8f6d801624,
  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.},
  author       = {Karlsson, Maths and Ahmed, Istaq and Matic, Aleksandar and Eriksson, Sten G.},
  booktitle    = {Solid State Ionics},
  issn         = {1872-7689},
  keyword      = {Raman spectroscopy,Proton-conducting,Perovskite,Infrared spectroscopy},
  language     = {eng},
  number       = {3-4},
  pages        = {126--129},
  publisher    = {Elsevier},
  title        = {Short-range structure of proton-conducting BaM0.10Zr0.90O2.95 (M = Y, In, Sc and Ga) investigated with vibrational spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.ssi.2009.03.020},
  volume       = {181},
  year         = {2010},
}