Challenges to Fabricate Large Size-Controllable Submicron-Structured Anodic-Aluminum-Oxide Film

  • Jin Shyong Lin Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan
  • Shih Hsun Chen Department of Engineering Technology and Industrial Distribution, Texas A&M University, College Station, Texas 77845, USA
  • Ker Jer Huang Chung-Shan Institute of Science and Technology, Taoyuan 32546, Taiwan
  • Chien Wan Hun Department of Mechanical Engineering, National United University, Miaoli 30063, Taiwan
  • Chien Chon Chen Department of Energy Engineering, National United University, Miaoli 30063, Taiwan.
Keywords: Anodic aluminum oxide (AAO), Electrochemistry, Large pore size, Exothermal reaction, Mass production


Anodic aluminum oxide (AAO) is well known for its unique controllable structure and functional contributions in research and developments. However, before AAO can be widely used in the industry, some engineering problems should be overcome. In this study, we designed a novel electrochemical mold, which can resolve the exothermal problem for large-size aluminum sheets during high-voltage anodization process. AAO film with a large sample size of 11 x 11 cm2 in area, 148 μm in thickness and 450 nm in average pore diameter, decorated with ordered-pattern structure, was successfully obtained through a 200 V anodization process. It was noticed that the local heat was generated with increasing the anodizing voltage, resulting in undesired pits and burr defects on the AAO surface. In order to retain AAO’s quality and reduce the producing cost of the anodization process, a mass producing system combining with an overhead conveyor was proposed. The convenient anodization system, novel electrochemical mold and bath may help to fabricate high-quality AAO films efficiently.


Download data is not yet available.