Structure Analysis of Beta–alumina Synthesized by Solid State Reaction

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摘要 The crystal structure of a solid electrolyte, beta-Al₂O₃, was investigated by XRD analysis and demonstrated by Diamond software. Its chemical formula was verified by the Ag ion molten salt exchange method and X-ray fluorescence analysis (XRF). The chemical formula of β-Al₂O₃ is Na₂O·8.52Al₂O₃, and its crystal is of hexagonal, space group P6₃/mmc, with a = 5.5941 Å and c = 22.5300 Å. The chemical formula ofβ΄΄-Al₂O is Na₂O·6.03Al₂O₃, and its crystal is of trigonal, space group R m, with α = 5.6017 Å and c = 33.6219 Å. The maximum span in the sodion migration of β''-phase (2.4283 Å) is only about a third of that for the β''-phase (6.9037 Å), so the β''-phase has higher ionic conductivity than the β-phase.

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	吉光辉
	朱承飞
	常凤真

关键词 ： beta-Al₂O₃, structure analysis, solid state reaction

Abstract：The crystal structure of a solid electrolyte, beta-Al₂O₃, was investigated by XRD analysis and demonstrated by Diamond software. Its chemical formula was verified by the Ag ion molten salt exchange method and X-ray fluorescence analysis (XRF). The chemical formula of β-Al₂O₃ is Na₂O·8.52Al₂O₃, and its crystal is of hexagonal, space group P6₃/mmc, with a = 5.5941 Å and c = 22.5300 Å. The chemical formula ofβ΄΄-Al₂O is Na₂O·6.03Al₂O₃, and its crystal is of trigonal, space group R m, with α = 5.6017 Å and c = 33.6219 Å. The maximum span in the sodion migration of β''-phase (2.4283 Å) is only about a third of that for the β''-phase (6.9037 Å), so the β''-phase has higher ionic conductivity than the β-phase.

Key words： beta-Al₂O₃ structure analysis solid state

收稿日期: 2014-01-23 出版日期: 2014-04-23

基金资助:This project was supported by NSFC projects (21203095), China Postdoctoral Science Foundation Projects (2012M511261) and Jiangsu Colleges and Universities Advantage Discipline Construction projects

通讯作者: 吉光辉: zhucf@njtech.edu.cn E-mail: 610612406@qq.com

作者简介: 吉光辉: zhucf@njtech.edu.cn

引用本文:

吉光辉;朱承飞;常凤真. Structure Analysis of Beta–alumina Synthesized by Solid State Reaction[J]. 结构化学, 2014, 33(8): 1227-1233.
JI Guang-Hui;ZHU Cheng-Fei;CHANG Feng-Zhen. Structure Analysis of Beta–alumina Synthesized by Solid State Reaction. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2014, 33(8): 1227-1233.

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http://manu30.magtech.com.cn/jghx/CN/ 或 http://manu30.magtech.com.cn/jghx/CN/Y2014/V33/I8/1227

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