Influence of Bi₂O₃ on Microstructure and Properties of YSZ Solid Electrolyte Material

Abstract:

Different contents of bismuth oxide doped in 3YSZ material and the mixed powder formed. After press forming,the samples were sintered at 850°C, 900°C, 1000°C and 1100°C respectively. The electrical properties,the thermal shock resistance,the phase components and the microstructure morphology were analyzed to study the solid solution mechanism of Bi₂O₃-Y₂O₃-ZrO₂ three-phase system. It was found that the Bi₂O₃ can effectively reduce sintering temperature as a flux. Sintered at 1000°C, t-ZrO₂ can be induced into m-ZrO₂ by Bi₂O₃ doped. With the increasing of Bi₂O₃ content, system shock resistance decreases. The thermal shock resistance of the 2-3mol% Bi₂O₃-YSZ is the best. In the different content of Bi₂O₃ system, 3mol% doped materials has the highest conductivity.

• Periodical: Materials Science Forum (Volume 848)
• Pages: 377-382
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.848.377
• Online since: March 2016
• Authors: Jun Peng Luan, Jing De Zhang, Ya Lei Liu, Chag Ku Ding, Fei Li
• Keywords: Bi₂O₃, Electrical Conductivity, Structure, YSZ

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