Interpore Distance Dependence of Anodic Aluminium Oxide Films on High-Purity Aluminium Sheet Surface Roughness Controlled By Electropolishing
Author of the article:JIANG Yongjun;XU Gangqian;WANG Yalan
Author's Workplace：School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China
Key Words：AAO membranes surface roughness interpore distances electric field
Abstract：
Anodic alumina template was prepared by using high-purity aluminum foil with different roughness in 0.3 M oxalic acid, and two-dimensional model was established by finite element numerical analysis method to study the influence of roughness on oxidation electric field. The results show that as the roughness increases from 5 nm to 50 nm, the spacing of template holes decreases from 80 nm to 70 nm. Microirregularities on the surface of aluminum foil cause a reverse electric field. The increase of roughness enhances the reverse electric field and weakens the average electric field in the membrane, thus reducing the spacing of template holes.
