提出了一套系统选择具有高透氧能力、结构稳定性及热化学稳定性的钙钛矿型混合氧离子电子导体透氧膜材料的策略，在此策略指导下开发出了若干新的导体膜材料．采用了标准陶瓷法、络合法等对材料进行了合成，采用色谱法及Ｘ射线粉末衍射法分别对其透氧性能与稳定性进行了测定与表征，并将其与几种典型透氧膜材料进行了比较．结果表明此系列新材料确实具有预期的透氧性能与结构和热化学稳定性．典型材料，Ｂａ０．5Ｓｒ０．５Ｃｏ０．８Ｆｅ０．２Ｏ３－δ导体膜在８５０℃下透氧量达１．１６ｍＬ［ＳＴＰ］·ｃｍ－２·ｍｉｎ－１，并在长达１０００多小时的测定中保持稳定的透氧能力．
A strategy for the systematic selection of perovskite-type mixed conducting membranes with high oxygen
permeability, phase stability and thermo-chemical stability was developed. Several promising membrane materials were then pointed out. Some of the
materials were synthesized by using standard ceramic method and complexing method, their oxygen permeability and stability were investigated and
compared with several typical conducting membranes such as SrCo0.8Fe0.2O3-δ and SrCo0.5FeO3.25 etc. The results show that the new materials indeed possess the expected properties.
The permeability of a typical material, Ba0.5Sr0.5Co0.8Fe0.2O3-δ membrane at 850℃ reaches 1.16mL[STP]·cm-2·min-1, higher than that of SrCo0.8Fe0.2O3-δ
membrane under similar operation conditions, the permeation flux can keep stable more than 1000h’s operation.
参考文献
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