Research on Anodic Porous Alumina Membranes

• Main Authors: Ju-mei Chiang, 姜如玫
• Other Authors: Chia-min Chao
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/eux98f

碩士 === 南華大學 === 環境管理研究所 === 94 === 　　The 99.46% aluminum sheet was anodized with 0.5 M oxalic electrolyte. We investigated the effects of voltages, anodic periods of time, temperature and the aluminum substrate thickness on the produced anodic porous alumina membranes. The anodic porous alumina membranes were characterized by scanning electron microscope. The maximum produced anodic alumina membrane thickness reaches 28.2μm, which is near half of the Whatman’s product. The maximum nanopore’s density is 1.2×10(10) /㎝ and the diameter ranges from 30 to 60 nm. We find that the anodic alumina layer thickness increases with increasing anodic treatment temperature and periods of time. When the applied voltages increases, the diameter of the nanopores increases but the density decreases. The nanopore’s density increases with decreasing anodic treatment temperature. The diameter and density of the nanopores decrease with decreasing the aluminum substrate thickness. The depth of the nanopore needs to be investigated by field emission scanning electron microscope. The roughness and purity of the aluminum affect the properties of the anodic porous alumina membranes significantly.