Electrochemical Formation of Thin Ceramic Mixed Conduction Membranes for Oxygen Separation

该计划解决了薄发展的需要， 用于实现可靠的氧气分离的陶瓷膜 高温 技术力量将被引导 向常温电解发展 薄膜陶瓷混合离子的制备方法 和用作氧分离的电子导体（MIEC） 膜。 这些膜将基于以下钙钛矿： 组成RE 1-xAxCo 1-yByO 3-a（其中稀土金属（RE）将选自 La、Nd、Sm、Gd、Dy、Er、Y B; A来自Ba、Sr和Ca，B来自 Fe、Ni、Ag和Cu。 这将由最初的 制备碳和氧化钇的带铸导电金属陶瓷， 石墨和YSZ粉末混合稳定的氧化锆（YSZ） 接着在惰性气氛下烧结该混合物 例如氩气或氮气。 这座建筑将为两个 目的：首先将导电基底提供到 可以进行渗透膜的电沉积， 其次，将金属陶瓷和电沉积膜 在空气中加热到700-900摄氏度，石墨就会燃烧， 留下高度多孔的YSZ结构， Pervasive Film支持。 性能特征 的MIEC膜支撑在多孔YSZ分离， 高温下的大气氧气 确定。//

This program addresses the need for development of thin ceramic membranes for achieving reliable oxygen separation at elevated temperatures. Technical effort will be directed towards development of ambient temperature electrolytic technique for the preparation of thin film ceramic mixed ionic and electronic conductors (MIEC) for use as oxygen separation membranes. These membranes will be based on perovskites of compositions RE1-xAxCo 1-yByO3-a (where the rare earth metal (RE) will be selected from La, Nd, Sm, Gd, Dy, Er, Yb; A from Ba, Sr, and Ca and B from Fe, Ni, Ag and Cu. This will be performed by initially preparing a tape cast conductive cermet of carbon and yttria stabilized zirconia (YSZ) by mixing graphite and YSZ powder followed by sintering the mixture under an inert atmosphere such as argon or nitrogen. This structure will serve two purposes: first it will provide a conductive substrate onto which electrodeposition of pervskite films can be performed, and secondly by taking the cermet and electrodeposited film up to 700-900 degrees celsius under air the graphite will burn out leaving a highly porous YSZ structure onto which the pervskite film is supported. The performance characteristics of MIEC membranes supported on porous YSZ for separation of atmospheric oxygen at elevated temperatures will be determined.//