Bi2V 0.9 Cu 0.1-x Sn x O 5.5-δ 氧离子导体的烧结行为、微结构与输运性能研究

无机材料学报, 2006, 21(6): 1423-1428. doi: 10.3724/SP.J.1077.2006.01423

Bi₂V _0.9 Cu _0.1-x Sn _xO _5.5-δ 氧离子导体的烧结行为、微结构与输运性能研究

Laboratory of Advanced Functional Materials and Devices, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China>

关键词： Bi2V0.9Cu0.1-xSnxO5.5-δ , electrical conductivity , microstructure , oxygen permeation

Sintering Behavior, Microstructure and Transport Properties of Bi₂V_0.9Cu_0.1-x Sn_xO _5.5-δ Oxygen-ion Conductor

WU Xiu-Sheng , FANG Shu-Min , JIANG Guo-Shun , CHEN Chu-Sheng , LIU Wei

Keywords： Bi2V0.9Cu0.1-xSnxO5.5-δ , 氧离子导体 , 微结构 , 氧输运性能

采用固相反应法合成了Bi ₂V_0.9 Cu_0.1-x Sn_x O _5.5-δ (0≤ x≤0.75)系列化合物. X-ray粉末衍射分析表明所制样品均是四方γ相. 实验研究表明: Sn的掺入未能进一步改善体系的电学性质, 但掺Sn有利于优化材料的微结构及材料力学性能的提高; 氧渗透测量数据分析得到Bi ₂V _0.9 Cu _0.05 Sn _0.05 O _5.5-δ陶瓷致密膜中氧的渗透输运过程主要是由表面氧交换控制的.

The samples of Bi ₂ V _0.9 Cu_0.1-x Sn _xO_5.5-δ (0≤ x ≤0.75) were prepared by solid-state reaction. Room temperature powder X-ray diffraction (XRD) indicates that the synthesized compounds present the tetragonal γ-phase structure. The measurement results show that doped-Sn benefits to the control of microstructure of the sample and favor its mechanic property though it doesn’t further improve the electrical conductivity of the system. The oxygen permeation measurement result indicates oxygen transport in Bi ₂V _0.9 Cu _0.1-x Sn _xO_5.5-δ system is controlled mainly by the process of surface oxygen exchange.

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