Phase Formation and Electrical Conductivity of Ba-Doped LaScO3
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概要
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Phase formation and conduction behavior in BaO-doped LaScO3 with the perovskite structure have been investigated. The structures of La1-xBaxScO3-δ were analyzed to be cubic for La0.6Ba0.4ScO3-δ and La0.5Ba0.5ScO3-δ, a mixture of cubic and orthorhombic for La0.9Ba0.1ScO3-δ, La0.8Ba0.2ScO3-δ and La0.7Ba0.3ScO3-δ, and orthorhombic for La0.95Ba0.05ScO3-δ. La1-xBaxScO3-δ showed a pure oxide-ion conduction below intermediate oxygen partial pressures under dry atmosphere. At high oxygen partial pressures, it exhibited mixed oxide-ion and p-type electronic conduction. In the presence of water vapor, proton conduction was observed due to the formation of protonic defects and the bulk conductivity by protons was highest in the composition of La0.5Ba0.5ScO2.75. The apparent activation energy for proton conduction was almost the same in each compound, 0.66–0.68 eV, despite the differences in crystal structure and A-site dopant concentration.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-07-15
著者
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Lee Kyu
Deparment Of Obstetrics & Gynecology College Of Medicine Pusan National University
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KIM Shin
R&D Center, SEBIT Co., Ltd.
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Kim Hye
Department Of Anesthesiology And Pain Medicine Konkuk University Chungju-hospital
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Lee Hong
Department Of Bio-resources And Pnu-special Animal Biotechnology Center College Of Natural Resources & Life Science Pusan National University
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Lee Hong
Department of Ceramic Engineering, Yonsei University, Seoul 120-749, Korea
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Kim Shin
R&D Center, SEBIT Co., Ltd., 30-7 Daewha-Ri, Sungnam-Myun, Chonan-Shi, Chungnam-Do 330-816, Korea
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