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Microstructure, nanochemistry and transport properties of Y-doped zirconia and Gd-doped ceria

Published online by Cambridge University Press:  11 February 2011

G. Petot-Ervas ,
C. Petot ,
J. M. Raulot ,
J. Kusinski ,
I. Sproule  and
M. Graham
G. Petot-Ervas
Affiliation:
CNRS-UMR 8580, SPMS, Ecole Centrale Paris, Grande voie des Vignes, 92295 Châtenay-Malabry, Cedex, (France)
C. Petot
Affiliation:
CNRS-UMR 8580, SPMS, Ecole Centrale Paris, Grande voie des Vignes, 92295 Châtenay-Malabry, Cedex, (France)
J. M. Raulot
Affiliation:
CNRS-UMR 8580, SPMS, Ecole Centrale Paris, Grande voie des Vignes, 92295 Châtenay-Malabry, Cedex, (France)
J. Kusinski
Affiliation:
Academy of Mining and Metallurgy, Krakow, Poland
I. Sproule
Affiliation:
CNRC, Ottawa, Canada
M. Graham
Affiliation:
CNRC, Ottawa, Canada
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Abstract

In this work we have shown the influence of the microstructure and nanochemistry on the transport properties of Y2O3-(9mol%) stabilized zirconia and Gd2O3 (10 mol%)-doped ceria. Zirconia (YSZ) samples show transport properties (DO, σgb) which increase with the grain size, while they decrease in ceria (GSC). This difference was attributed to the presence of glassy grain boundary precipitates in YSZ. On the other hand, it was shown that kinetic demixing processes during cooling, at the end of sintering, play an important role on the grain boundary properties of these oxides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE4.4
Copyright
Copyright © Materials Research Society 2003

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References

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