Investigation of novel zir-conium based perovskite-type mixed conducting membranes for oxygen separation  

作　　者：Jianhua Tong Weishen Yang Zongping Shao Guoxing Xiong Liwu Lin 

出　　处：《Chinese Science Bulletin》2001年第6期473-477,共5页

基　　金：the National Advanced Materials Committee (Grant No.715-006-0122), the Ministry of Science and Technology of China (Grant No. 1999022401) and the National Natural Science Foundation of China (Grant No. 59789201).

摘　　要：A series of BaZr0.2Co0.8-χFeχO3-σ materials for oxygen separation were synthesized through a citric and EDTA acid combined complexing method, and their crystal structures, oxygen permeabilities, sintering and sealing abilities were investigated. The results showed that the cubic perovskite structure was formed for materials in the composition range investigated. Oxygen permeation flux and stability, as well as sintering and sealing abilities of the synthesized materials were increased or improved apparently due to the introduction of zirconium. For example, the oxygen permeation flux reached 0.8 mL/min · cm2 when χ = 0.2 or 0.3 at 950℃, and a stable time-related oxygen permeation flux was found for the BaZr0.2Co0.3Fe0.5O3-σ membrane at 800℃.A series of BaZr0.2Co0.8?xFexO3?δ materials for oxygen separation were synthesized through a citric and ED-TA acid combined complexing method, and their crystal structures, oxygen permeabilities, sintering and sealing abilities were investigated. The results showed that the cubic perovskite structure was formed for materials in the composition range investigated. Oxygen permeation flux and stability, as well as sintering and sealing abilities of the synthesized materials were increased or improved apparently due to the introduction of zirconium. For example, the oxygen permeation flux reached 0.8 mL/min · cm2 whenx = 0.2 or 0.3 at 950 C, and a stable time-related oxygen permeation flux was found for the BaZr0.2Co0.3Fe0.5O3?δ membrane at 800 °C.

关 键 词：perovskite MIXED conductor oxygen PERMEATION mem- BRANE zirconium. 

分 类 号：TQ028[化学工程]