Nattasamon Petchsang. The effect of various factors on the fabrication of anodized aluminum oxide . Master's Degree(Physics). Mahidol University. : Mahidol University, 2006.
The effect of various factors on the fabrication of anodized aluminum oxide
Abstract:
Anodization is a process to produce a thick oxide layer on the surface of metal
by inducing an ionic current through the layer. A two-step anodization is used to
fabricate the anodic aluminum oxide template. This process occurs under suitable
conditions, such as 0.3M oxalic acid with a voltage of 40 volts applied across the cell.
However, it is not know what combination of temperature and current strength is the
most suitable. In this study the anodization was done at 16 °C, 21 °C and 26 °C and
with the currents of 50 mA, 70 mA, 90 mA, and 110 mA. The morphologies of
anodized aluminum oxide in various conditions were obtained diameters of the holes
on the surface of anodized aluminum oxide in order to ascertain which combination of
temperature and current produced the best results.
The quality of the anodized aluminum oxide at 16 °C and 90 mA was the
highest but only marginally more than other combinations. The initial temperature was
seen to have the greatest effect on the size of holes’ diameters. The sizes of holes’
diameters did not show any correlation with the current. Current densities decreased
when the temperature decreased. The current densities at the equilibrium points were
the same when the same temperature was used.