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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

多孔γ-Al2O3过渡膜的结构与性能研究

于云1; 何超1; 陈新彪1; 王振红1; 胡行方1; LARBOTAndré2   

  1. 1. 中国科学院上海硅酸盐研究所, 上海 200050; 2. Institut Europeendes Membranes; Campus CNRS ; 1919; Route de Mende; Mende-34293 Montpellier Cedex 5; France
  • 收稿日期:2001-10-15 修回日期:2002-01-22 出版日期:2002-11-20 网络出版日期:2002-11-20

Structure and Performance of Porous 7-alumina Transition Layers

YU Yun1; HE Chao1; CHEN Xin-Biao1; WANG Zhen-Hong1; HU Xing-Fang1; LARBOT Andre2   

  1. 1. Research and Development Center of Special Inorganic Materials of Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; 2. Institut Europeendes Membranes; Campus CNRS 1919; Route de Mende-34293 Montpellier Cedex 5; France
  • Received:2001-10-15 Revised:2002-01-22 Published:2002-11-20 Online:2002-11-20

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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.

关键词: 溶胶-凝胶工艺, γ-Al2O3过渡膜, 微观结构, 性能

Abstract: 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.

Key words: sol-gel method, 7-alumina transition membrane, microstructure, performance

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