ALPHA-Al203 PHASE ANODIC ALUMINUM OXIDE AND PREPARATION METHOD THEREFOR

Abstract: an anodic aluminum oxide preparation method comprises the steps of: anodizing aluminum in an electrolyte containing oxalic acid, thereby preparing anodic aluminum oxide having upper pores; applying a water-repellent coating to the upper pores of the anodic aluminum oxide; etching the lower part of the anodic aluminum oxide having the upper pores to which the water-repellent coating has been applied, thereby forming lower pores; immersing the anodic aluminum oxide in a pore-widening solution, thereby widening the diameter of the lower pores such that the diameter of the lower pores becomes equal to the diameter of the upper pores; and heat-treating the anodic aluminum oxide in which the upper pores and the lower pores have the same diameter.

Inventor(s): Yong Ho CHOA, Jae Ho YI, Ji Young PARK, Hai Shan SHEN

CPC Classification: C25D11/10 (PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR)

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