多孔γ-Al_2O_3过渡膜的结构与性能研究  

Structure and Performance of Porous 7-alumina Transition Layers

作　　者：于云[1] 何超[1] 陈新彪[1] 王振红[1] 胡行方[1] LARBOTAndré 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]Institut Europeendes Membranes,Campus CNRS

出　　处：《无机材料学报》2002年第6期1277-1282,共6页Journal of Inorganic Materials

基　　金：中法先进研究合作计划(PRA MX00-04)

摘　　要：采用溶胶-凝胶技术,在多孔Al2O3载体上制备了一层适合于涂覆分离膜的γ-Al2O3多孔过渡膜.通过XRD与DTA-TG等测试手段研究了γ-Al2O3凝胶膜在热处理过程中的物理化学变化;通过TEM、SEM分析与泡点法研究了多孔膜的微观结构.实验结果表明:实验中制备的γ-Al2O3膜具有择优取向的特点;γ-Al2O3过渡膜的最可几孔径为0.38μm左右,厚度为4μm.薄膜的渗透性能测试结果表明,材料对H2与N2气的最大分离系数α=3.30.Porous γ-alumina transition membranes with a most probable pore size of 0.38μm and thickness of 4μm were successfully synthesized via sol-gel route on the porous alumina substrates with pore size of 0.9μm. The physical chemistry transformation and microstructure of the as-prepared membranes were systematically characterized by using DTA-TG, FTIR, XRD and SEM. The results indicate that the transition membranes fabricated in the work are smooth without any crack. Also, As-prepared membrane has the characteristic of preferred oritation. The separation coefficient for H2-N2 is about 3.30.

关 键 词：多孔γ-Al2O3过渡膜 溶胶-凝胶工艺 微观结构 性能 氧化铝 无机分离膜 膜分离 

分 类 号：TQ028.8[化学工程] O484[理学—固体物理]