Technology development for obtaining a multilayer nanoporous aluminum oxide

Abstract

Experimental preparation of multilayer nanoporous alumina was carried out. The oxide was obtained from aluminum, purity 99.7%. Obtaining aluminum oxide was carried out in a complex electrolyte containing a mixture of acids. The method of mixed multipulse anodizing was applied, using constant current and constant voltage modes. SEM investigated the obtained nanoporous oxide. The geometrical characteristics were determined. A method for controlling the thickness is proposed based on the analysis of changes in the growth rates of anodic alumina.