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Proton Diffusion in Hydrated Acceptor-Doped Barium Zirconate

Published online by Cambridge University Press:  26 February 2011

Dirk Wilmer ,
Tilo Seydel  and
Klaus-Dieter Kreuer
Dirk Wilmer
Affiliation:
wilmer@uni-muenster.de, University of Münster, Institute of Physical Chemistry, Corrensstr. 30, Münster, 48149, Germany
Tilo Seydel
Affiliation:
seydel@ill.fr, Institut Laue-Langevin, Grenoble, 38042, France
Klaus-Dieter Kreuer
Affiliation:
k.-d.kreuer@fkf.mpg.de, Max-Planck-Institute for Solid State Research, Stuttgart, 70569, Germany
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Abstract

Quasielastic neutron scattering experiments have been performed on proton-conducting hydrated Y-doped BaZrO3 at temperatures between 473 K and 673 K. Quasielastic broadening is observed at all temperatures, but only at the higher ones the scattering exhibits the characteristics of the proton transport process. Attempts to interpret our data in the framework of the two-state model yield unconvincing results. A simpler approach using the isotropic Chudley-Elliott model yields reasonable values for the proton self-diffusivities but also unusually high values for the jump distance which are close to the mean distance between dopants.

Keywords

neutron scatteringceramicdiffusion
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA01-04
Copyright
Copyright © Materials Research Society 2007

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