Journal
SCRIPTA MATERIALIA
Volume 65, Issue 2, Pages 96-101Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.09.019
Keywords
Ionic conductors; Nanostructured materials; Oxygen vacancies; Grain boundaries; Electrical resistivity/conductivity
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Works on nanostructured ZrO2, including nanocrystalline ceramics, polycrystalline and epitaxial thin films, and heterostructures, are evaluated. Lower total conductivity has been achieved for nanocrystalline ceramics and polycrystalline thin films. Higher conductivity was reported for epitaxial films, but this might be an artefact of the substrate. The colossal ionic conductivity that was claimed for heterostructures has now been demonstrated to be electronic in origin. However, distinctively different properties may appear in ZrO2 for grain sizes <5 nm. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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