摘要
通过柠檬酸-EDTA络合法合成了不同的A位Sr取代的LSCF系钙钛矿型粉体材料La0.1Sr0.9Co0.8Fe0.2O3-δ、La0.3Sr0.7Co0.8Fe0.2O3-δ、La0.5Sr0.5Co0.8Fe0.2O3-δ和La0.8Sr0.2Co0.8Fe0.2O3-δ,采用XRD测试手段对粉体及膜片的晶体结构进行了表征。用静压片法制备透氧膜,并测定了LSCF系钙钛矿膜的透氧量,分析了温度和A位Sr不同掺杂量等因素对膜透氧性能的影响。结果表明,该系列膜的透氧量均随着温度升高而增大,随着Sr掺杂量的增加而增大。并在850℃下对透氧膜100h透氧稳定性进行实验研究,结果表明,膜片的透氧量随时间没有明显变化,表现出良好的稳定性。
Perovskite-type LSCF oxide ceramic materials with different quantity Sr partial substitution ot A site were synthesized by the EDTA-nitric complexation method. The perovskite structure of the powder and membrane were confirmed by XRD results, Dense membranes were prepared by uniaxial pressing method using LSCF podwer. The effect of temperature and different quantity substitution of A site on the oxygen permeation properties was investigated. The results show that the oxygen permeation rates of membranes enhanced with the increasing temperature and quantity of Sr doping. The oxygen permeation stability was also studied by the permeation measurements during 100h at the temperature of 850℃. It is shown that the oxygen permeation rates of membranes were stable as result of no changing evidently with the operation time.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第2期173-176,共4页
Journal of Materials Science and Engineering
基金
广东省自然科学基金资助项目(06025657)
关键词
钙钛矿
透氧膜
透氧性能
perovskite
dense membrane
oxygen permeation
