Title

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

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.

Meeting Name

Materials for Energy Storage, Generation and Transport (2002: Apr. 2-4, San Francisco, CA)

Department(s)

Materials Science and Engineering

Keywords and Phrases

Composition; Doping (additives); Electric conductivity; Electric resistance; Grain boundaries; Grain size and shape; Ions; Spectroscopic analysis; Impedance spectra; Cerium compounds

International Standard Serial Number (ISSN)

2729172

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2002 Cambridge University Press, All rights reserved.

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