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无机材料学报

无机材料学报

• 研究论文 • 上一篇    

以无机盐为原料制备钇稳定的氧化锆超滤膜

夏长荣; 高建峰; 彭定坤; 孟广耀   

  1. 中国科学技术大学材料科学与工程系, 合肥 230026
  • 收稿日期:2000-01-14 修回日期:2000-02-29 出版日期:2001-01-20 网络出版日期:2001-01-20

Preparation of Yttria Stabilized Zirconia Ultrafiltration Membranes with Inorganic Precursors

XIA Chang-Rong; GAO Jian-Feng; PENG Ding-Kun; MENG Guang-Yao   

  1. Department of Materials Science and Engineering; University of Science and Technology of China; Hefei 230026; China
  • Received:2000-01-14 Revised:2000-02-29 Published:2001-01-20 Online:2001-01-20

PDF (PC)

932

被引次数

24

摘要： 用无机盐ＺｒＯＣｌ２·８Ｈ２Ｏ和Ｙ（ＮＯ３）３·６Ｈ２Ｏ为原料，以溶胶－凝胶技术路线，在多孔氧化铝支撑体上成功地制备了记稳定的氧化锆（ＹＳＺ）陶瓷膜．扫描电子显微镜（ＳＥＭ）分析表明，用沉淀、胶溶、成膜的溶胶－凝胶技术，不能制备表面无龟裂的ＹＳＺ膜．沉淀用共沸蒸馏法干燥，得到高分散性的ＹＳＺ粉体，再用超声法制备ＹＳＺ氧化物胶体，通过浸渍成膜，ＳＥＭ分析证明，ＹＳＺ膜表面无明显缺陷．室温氮气渗透实验进一步证明，膜结构完整．用等温氮吸附实验测定了无支撑体膜的孔径大小和分布，平均孔径约为６ｎｍ．用激光散射技术测定ＹＳＺ胶体粒子平均半径为１１６ｎｍ，透射电子显微镜观察表明，胶体粒子由大小约为２０ｎｍ的晶粒组成．

关键词: 氧化锆, 陶瓷膜, YSZ, 溶胶凝胶

Abstract: Yttria stabilized zirconia (YSZ, 8% mol Y2O3) membranes with expected composition were coated on porous alumina substrates by a dip-coating process
with YSZ sol, which was prepared by sonicated dispersing YSZ powder in ethanol. The YSZ powder was synthesized by co-precipitation from inorganic aqueous solutions
of ZrOCl2·8H2O and Y(NO3)3·6H2O, followed by azeotropic distillation and sintered at 600℃ for 2h. Crystalline structure of the
YSZ powder was characterized by X-ray diffraction. Particle size of the sol was determined by laser scattering measurement. The mean pore diameter of an unsupported
YSZ membrane was about 6nm as investigated by nitrogen isothermal desorption measurement. Investigation with scanning electron microscopy and nitrogen permeation testing
showed that the membranes were crack-free.

Key words: ceramic membrane, YSZ, zirconia, sol-gel

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