Unraveling the defect chemistry and proton uptake of yttrium-doped barium zirconate

作者：Yamazaki Yoshihiro; Yang Chih Kai; Haile Sossina M^*

来源：Scripta Materialia, 2011, 65(2): 102-107.

DOI：10.1016/j.scriptamat.2010.12.034

• Proton-conducting oxides
• Barium zirconate
• Water uptake
• Defect chemistry
• Fuel cells

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.

• 出版日期2011-7