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

Preparation and Oxygen Permeation Property of Pr_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Hollow Fiber Membranes

作　　者：张曙光[1] 李念泰[1] 谭小耀[1,2] 

机构地区：[1]山东理工大学化工学院,山东淄博255049 [2]天津工业大学环境与化学工程学院,天津300160

出　　处：《硅酸盐学报》2011年第7期1149-1154,共6页Journal of The Chinese Ceramic Society

基　　金：国家“863”计划(2006AA03Z464);国家自然科学基金(20976098);山东省自然科学基金(Y2007F18)资助项目

摘　　要：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1 300℃提高到1 350℃时,中空纤维膜的透氧速率急剧下降。A series of ceramic powders,Pr1-xSrxCo1-yFeyO3-δ（x = 0.2,0.4,0.6;y = 0.2,0.4,0.6,0.8）,were prepared by a modified sol-gels method.The ceramic hollow-fiber membranes of Pr0.6Sr0.4Co0.2Fe0.8O3-δ（PSCF6428） were manufactured by a combined phase-inversion/sintering technique.The prepared powders and the green and sintered hollow-fiber membranes were characterized by thermal analysis,X-ray diffraction,scanning electron microscopy and X-ray energy dispersive spectroscopy.The hollow-fiber mem-brane prepared had fingerlike structures located at the outer and inner walls of the fiber.The oxygen permeation fluxes of the hol-low-fiber membranes were measured at different temperatures.Sintering temperature of the hollow-fiber membranes had an effect on the oxygen permeation property.The oxygen permeation rate decreased when the sintering temperature increased from 1 300 to 1 350 ℃.

关 键 词：混合离子-电子导体 中空纤维膜 透氧 

分 类 号：TQ174[化学工程—陶瓷工业] TB383[化学工程—硅酸盐工业]