Defects and Conductivity in Ceria-based Oxides
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| 1) Department of Materials, Imperial College, London |
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(Received August 4, 2008)
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The electrical conductivity of ceria solid solutions has been extensively investigated for many years, and many theories have been advanced to explain the differences seen in ostensibly identical materials. This short review looks at some recent theoretical and experimental evidence which has thrown new light onto the complex interplay between the cation and anion sublattice in these technologically important materials. |
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| This short review looks at some recent theoretical and experimental evidence which has thrown new light onto the complex interplay between the defects that form on the cation and anion sublattice in doped CeO2. These defect interactions give rise to the type of behavior shown in the figure, and recent insight into their nature has indicated ways in which the ionic conductivity might be optimized by novel substitution schemes. |
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