Preparation of defect free ceramic/Ti composite membranes by surface modification and in situ oxidation

来源期刊:中南大学学报(英文版)2019年第12期

论文作者:张栋强 杨平 吴见洋 赵静 陈彦安

文章页码:3295 - 3304

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

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.

Cite this article as: ZHANG Dong-qiang, YANG Ping, WU Jian-yang, ZHAO Jing, CHEN Yan-an. Preparation of defect free ceramic/Ti composite membranes by surface modification and in situ oxidation [J]. Journal of Central South University, 2019, 26(12): 3295-3304. DOI: https://doi.org/10.1007/s11771-019-4253-x.

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