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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

La2NiO4+δ透氧膜材料的结构特点与性能

张华1; 金江1; 余桂郁1; 杨南如1; 施剑林2; 冯景伟2   

  1. 1. 南京化工大学材料学院, 南京 210009; 2. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2000-05-08 修回日期:2000-06-19 出版日期:2001-05-20 网络出版日期:2001-05-20

Structure and Properties of La2NiO4+δ Oxygen Permeation Membranes

ZHANG Hua1; JIN Jiang1; YU Gui-Yu1; YANG Nan-Ru1; SHI Jian-Ling2; FENG Jing-Wei 2   

  1. 1.College of Materials Science and Engineering; Nanjing University of Chemical Technology; Nanjing 210009 China; 2. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050, China
  • Received:2000-05-08 Revised:2000-06-19 Published:2001-05-20 Online:2001-05-20

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摘要： 讨论了Ｌａ２ＮｉＯ４＋δ透氧膜材料的结构特点及氧渗透性能．对Ｌａ２ＮｉＯ４＋δ试样电子衍射谱的分析表明，其结构中由于填隙氧离子的存在及其有序化，出现了超结构现象，并根据此结构对衍射谱进行了指标化，同时探讨了结构特点与透氧机制之间的关系．

关键词: La2NiO4＋δ, 透氧膜, 晶体结构, 混合导电性, 氧渗透性能

Abstract: The structure and the permeability of La2NiO4+δ oxygen permeating membranes were discussed. TEM studies of La2NiO4+δ show that La2NiO4+δ
contains a large amount of interstitial oxygen and exhibits a superstructure behavior owing to long range ordering of interstitial oxygen. The oxygen permeation
flux through La2NiO4+δ was determined and the relationship between mechanism of oxygen permeability and structure was discussed. The results indicate
that the oxygen transportation by interstitial mechanism is easier than that by vacancy mechanism.

Key words: La2NiO4+δ, oxygen permeating membrane, crystalline structure, mixed conductivity, oxygen permeability

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