Journal
SCRIPTA MATERIALIA
Volume 65, Issue 2, Pages 102-107Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.12.034
Keywords
Proton-conducting oxides; Barium zirconate; Water uptake; Defect chemistry; Fuel cells
Categories
Funding
- Gordon and Betty Moore Foundation
- National Science Foundation through the Caltech Center for the Science and Engineering of Materials, a Materials Research Science and Engineering Center
- [DMR-052056]
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A review of the experimental literature documenting water uptake in yttrium-doped barium zirconate in combination with new results obtained here show that much of the observed scatter can be explained in terms of barium deficiency, which furthermore induces a lowering in cell volume. In addition, through a comparison of weight changes under regular and heavy water vapor pressure, strong evidence is found for bulk oxidation of the oxide by water simultaneous with hydration. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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