Paper Title:
Microstructure Control and Phase Structure Study of Porous Alumina Membrane
  Abstract

A two-step anodization process was used to fabricate wide-range highly ordered porous anodic alumina membrane (PAA) in the electrolyte of oxalic acid through different anodic voltages. The effect of anodic voltage, pretreatments and pore-expanding time on the microstruture of PAA membrane was also studied in the process of two-step anodization. In a certain range, with the increase of anodic voltage, the pore diameter almost increases linearly while the pore density almost decreases linearly. The PAA template with anneal and electropolishing process has better regularity. In a certain time range, the pore diameter increases obviously with the pore-expanding time. It was demonstrated by XRD that the crystal constitution of the PAA without heat treatment was polycrystalline structure which contained Baehmite phase (Al2O3.H2O), Gibbsite phase (Al2O3.3H2O) and θ-Al2O3 phase. After heat treatment at 500°C for 0.5h, only the θ-Al2O3 phase was retained.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
2232-2234
DOI
10.4028/www.scientific.net/KEM.336-338.2232
Citation
Y. M. Tian, M. X. Xu, X. Z. Liu, L. Ge, P. Zhang, "Microstructure Control and Phase Structure Study of Porous Alumina Membrane", Key Engineering Materials, Vols. 336-338, pp. 2232-2234, 2007
Online since
April 2007
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$32.00
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