La_2NiO_(4+δ)透氧膜材料的结构特点与性能  

Structure and Properties of La_2NiO_(4+δ) Oxygen Permeation Membranes

作　　者：张华[1] 金江[1] 余桂郁[1] 杨南如[1] 施剑林[2] 冯景伟[2] 

机构地区：[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

出　　处：《无机材料学报》2001年第3期442-446,共5页Journal of Inorganic Materials

基　　金：中科院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室资助项目

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．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.

关 键 词：透氧膜 晶体结构 混合导电性 氧渗透性能 膜分离 镍酸镧 膜材料 制备 

分 类 号：TQ028.8[化学工程] O484[理学—固体物理]