Grain Size and Chemical Composition Effects on the Grain Boundary Resistance of Ceria
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.
X. Zhou et al., "Grain Size and Chemical Composition Effects on the Grain Boundary Resistance of Ceria," Proceedings of the Materials for Energy Storage, Generation and Transport (2002, San Francisco, CA), vol. 730, pp. 99-104, Cambridge University Press, Apr 2002.
The definitive version is available at http://dx.doi.org/10.1557/PROC-730-V4.4
Materials for Energy Storage, Generation and Transport (2002: Apr. 2-4, San Francisco, CA)
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)
Article - Conference proceedings
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