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Journal Article

Partial electronic and ionic conduction in nanocrystalline ceria: role of space charge

MPS-Authors
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Kim,  S.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Maier,  J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kim, S., & Maier, J. (2004). Partial electronic and ionic conduction in nanocrystalline ceria: role of space charge. Journal of the European Ceramic Society, 24(6), 1919-1923.


Cite as: https://hdl.handle.net/21.11116/0000-000E-F605-7
Abstract
The total electrical conductivities of Gd-doped (0.15 mol%) and
nominally pure nanocrystalline CeO2-x ceramics (similar to 30 nm grain
size) were measured by impedance spectroscopy as a function of
temperature and oxygen partial pressure. Careful separation of the
partial ionic and electronic contributions using an electronically
blocking cell allowed for a clear distinction between potential
explanations. It is shown that unlike competing models the space charge
model explains all the experimental features not only qualitatively but
also quantitatively. (C) 2003 Elsevier Ltd. All rights reserved.