Role of space charge in the grain boundary blocking effect in doped zirconia

Guo, X.; Sigle, W.; Fleig, J.; Maier, J.

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Role of space charge in the grain boundary blocking effect in doped zirconia

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

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Sigle, W.
Scientific Facility Stuttgart Center for Electron Microscopy (Peter A. van Aken), Max Planck Institute for Solid State Research, Max Planck Society;

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Fleig, J.
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

Guo, X., Sigle, W., Fleig, J., & Maier, J. (2002). Role of space charge in the grain boundary blocking effect in doped zirconia. Solid State Ionics, 154-155, 555-561.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F223-9

Abstract

Although the presence of siliceous phases is a major cause of
the grain boundary blocking effect in doped zirconia (ZrO2),
the grain boundary resistivity also appears to be significantly
influenced by space charges. The ionic transport across the
grain boundaries occurs solely through direct grain-to-grain
contacts which are themselves blocking in nature. Such a
blocking effect can be consistently accounted for by the oxygen
vacancy depletion in the grain boundary space charge layer. The
Al2O3 addition markedly modified the grain boundary properties,
which are also consistently explained by the space charge
effect. (C) 2002 Elsevier Science B.V. All rights reserved.