期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 493, 期 1-2, 页码 288-293出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.12.082
关键词
Ceramics; Sintering; Solid state reactions; Microstructure; Ionic conduction; Fuel cells
资金
- National Natural Science Foundation of China [50872090]
The influences of CuO doping on the sintering behavior, phase formation and electrochemical properties of yttrium-doped barium zirconate were investigated in this study. Unmodified yttrium-doped barium zirconate was difficult to densify. 1-2 mol% CuO can markedly enhance the sinterability of yttrium-doped barium zirconate. No CuO was detected in the CuO-modified samples, which suggested that the CuO might dissolve into the perovskite lattice structure. The electrical conductivity of 1 mol% CuO-modified yttrium-doped barium zirconate was close to that of unmodified one at the testing temperatures ranging from 500 degrees C to 800 degrees C in moisture-saturated hydrogen. Electromotive force measurements under fuel cell conditions revealed that the ionic transport number of CuO-modified yttrium-doped barium zirconate was large enough to apply the material as electrolyte in solid oxide fuel cell. (C) 2009 Elsevier B.V. All rights reserved.
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