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Comparison between Y-doped ceria and Ho-doped ceria: Electrical conduction and microstructures |
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| Authors: | Ding Rong Ou Toshiyuki Mori Fei Ye Jin Zou John Drennan |
| Affiliation: | aFuel Cell Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;bSchool of Engineering, The University of Queensland, St. Lucia, Qld 4072, Australia;cCentre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Qld 4072, Australia |
| Abstract: | The electrical conduction and microstructure in Y-doped ceria and Ho-doped ceria were investigated. Visible differences between the two doped ceria were observed. The plots of conductivity of Y-doped ceria are well fit to the Arrhenius behavior, while curvature and kinks were observed on the plots of Ho-doped ceria. Such deviation from the Arrhenius behavior could be related to the existence of precipitates in Ho-doped ceria. It indicates that the electrolytic conductivity of doped ceria could be significantly influenced by microstructure features. |
| Keywords: | Microstructure Electrical properties Rare-earth oxides Solid electrolyte Fuel cell TEM |
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