摘要
用稳态法研究了具有类钙钛矿结构的Y1-xLaxBa2Cu3O7-δ(x=0.1、0.3、0.5、 0.8和1.0)致密透氧膜在750—1000℃之间的透氧量.实验发现,透氧速率随着La替代Y的比例x的增加而增加;在大约875℃,氧空位的有序-无序转变导致透氧率有一个突然增加.透氧膜的两侧分别为He气氛和空气,当La完全替代Y时,厚1.0mm的LaBa2Cu3O7-δ膜的透氧量达到1.22μmol/s·cm2(1.64 mL/min·cm2).
Oxygen permeation fluxes through dense perovskite-related type Y1-xLaxBa2Cu3O7-δ (x=0.1, 0.3, 0.5, 0.8 and 1.0) membranes were investigated by the steady state permeation method in a temperature range from 750℃ to 1000℃. Oxygen permeation flux increases with the increase in La element substitution proportions, and increases sharply at about 875℃ due to an order- disorder transition of the oxygen vacancies in the membrane, oxygen flux of LaBa2Cu3O7-δ(x=1.0) membrane with thickness 1.0mm reaches 1.22 μmol/s·cm^2 (1.64 mL/min·cm^2) under air/He gradients at 1000℃.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期199-203,共5页
Journal of Inorganic Materials
基金
河南省教育厅基础研究项目(2004601061)