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Please use this identifier to cite or link to this item: https://libeldoc.bsuir.by/handle/123456789/46250
Title: Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth
Authors: Позняк, А. А.
Плиговка, А. Н.
Ларин, Т. Д.
Keywords: публикации ученых;sulphuric acid;galvanostatic anodizing;dissociation;X-ray diffraction;current efficiency;anodic aluminum oxide;aluminum foil;Pilling–Bedworth ratio;low current density
Issue Date: 2021
Publisher: MDPI
Citation: Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth / A. Poznyak [et. al.] // MDPI Materials. – 2021. – № 14 (767). – P. 1–16. – DOI : 10.3390/ma14040767.
Abstract: The volumetric growth, composition, and morphology of porous alumina films fabricated by reduced temperature 280 K galvanostatic anodizing of aluminum foil in 0.4, 1.0, and 2.0 M aqueous sulfuric acid with 0.5–10 mA•cm−2 current densities were investigated. It appeared that an increase in the solution concentration from 0.4 to 2 M has no significant effect on the anodizing rate, but leads to an increase in the porous alumina film growth. The volumetric growth coefficient increases from 1.26 to 1.67 with increasing current density from 0.5 to 10 mA•cm−2 and decreases with increasing solution concentration from 0.4 to 2.0 M. In addition, in the anodized samples, metallic aluminum phases are identified, and a tendency towards a decrease in the aluminum content with an increase in solution concentration is observed. Anodizing at 0.5 mA•cm−2 in 2.0 M sulfuric acid leads to formation of a non-typical nanostructured porous alumina film, consisting of ordered hemispheres containing radially diverging pores.
URI: https://libeldoc.bsuir.by/handle/123456789/46250
Appears in Collections:Публикации в зарубежных изданиях

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