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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 12    December 2019

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Preparation of defect free ceramic/Ti composite membranes by surface modification and in situ oxidation
ZHANG Dong-qiang(张栋强), YANG Ping(杨平), WU Jian-yang(吴见洋), ZHAO Jing(赵静), CHEN Yan-an(陈彦安)

College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China

Abstract:Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support, in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes on this basis. In situ oxidation conditions experimental results show that the best condition for preparing the TiO2-Al2O3/Ti composite membrane is under 800 °C for 2 h, and the microstructure and pore sizes of the TiO2-Al2O3/Ti composite membranes are affected obviously. The thickness and composition of the TiO2/Ti composite membranes are determined by SEM and XRD completely. The pore size distribution of the composite membrane is measured by bubble pressure method, the most probable aperture is about 3.12 μm, while the average pore size of defect free TiO2-Al2O3/Ti is about 3.23 μm. After ultrasonic treatment, the slight weight change of membranes reveals no observable change, which indicates that TiO2-Al2O3/Ti composite membranes maintain a good stability.

 

Key words: porous Ti; ceramic; TiO2 layer; in situ oxidation; composite membrane; surface modification

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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