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Pr0.6Sr0.4Co0.2Fe0.8O3-δ中空纤维陶瓷膜的制备及其透氧性能

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Abstract:

采用改进的溶胶-凝胶法制备了一系列陶瓷粉体Pr1-xSrxCo1-yFeyO3-δ(x=0.2、0.4、0.6;y=0.2、0.4、0.6、0.8)。运用相转化/烧结技术制造出了Pr0.6Sr0.4Co0.2Fe0.8O3-δ(PSCF6428)中空陶瓷纤维膜。用热分析、X射线衍射仪、扫描电镜、X射线能谱等技术对制备的粉体、烧结前后的中空纤维膜进行了表征。结果表明所制备的中空纤维膜内外壁部分均为指状孔结构,中间为海绵状致密层。运用气相色谱仪在线测定了中空纤维膜透氧通量随温度变化的关系。结果表明膜烧结温度对其透氧性能具有相当大的影响,当烧结温度从1300℃提高到1350℃时,中空纤维膜的透氧速率急剧下降。

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