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Grain Size and Chemical Composition Effects on the Grain Boundary Resistance of Ceria

Published online by Cambridge University Press:  01 February 2011

Xiao-Dong Zhou ,
Harlan U. Anderson  and
Wayne Huebner
Xiao-Dong Zhou
Affiliation:
Electronic Materials Applied Research Center, Department of Ceramic Engineering University of Missouri-Rolla, Rolla, MO 65401, U. S. A.
Harlan U. Anderson
Affiliation:
Electronic Materials Applied Research Center, Department of Ceramic Engineering University of Missouri-Rolla, Rolla, MO 65401, U. S. A.
Wayne Huebner
Affiliation:
Electronic Materials Applied Research Center, Department of Ceramic Engineering University of Missouri-Rolla, Rolla, MO 65401, U. S. A.
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Abstract

Studies related to the effects of grain size (30nm – 5.0μm) on the electrical conductivity of undoped CeO2 and Ce0.90Gd0.10O1.95 were performed. A series of impedance spectra as a function of temperature and grain size were analyzed. It was found that the ratio of the grain boundary resistance to the total resistance became lower with decreasing grain size, increasing temperature or increasing Gd content. For the case of Gd doped CeO2, the source of the grain boundary resistance may be due to the trapping of oxygen ions in the grain boundary area.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 730: Symposium V – Materials for Energy Storage, Generation, and Transport , 2002 , V4.4
Copyright
Copyright © Materials Research Society 2002

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