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Effect of electrolyte temperature on the formation of self-organized anodic niobium oxide microcones in hot phosphate–glycerol electrolyte

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Title: Effect of electrolyte temperature on the formation of self-organized anodic niobium oxide microcones in hot phosphate–glycerol electrolyte
Authors: Yang, S. Browse this author
Aoki, Y. Browse this author
Habazaki, H. Browse this author
Keywords: Anodizing
Anodic oxide
Nanoporous film
Self-organization
Organic electrolyte
Issue Date: 15-Jul-2011
Publisher: Elsevier
Journal Title: Applied Surface Science
Volume: 257
Issue: 19
Start Page: 8190
End Page: 8195
Publisher DOI: 10.1016/j.apsusc.2011.01.041
Abstract: Nanoporous niobium oxide films with microcone-type surface morphology were formed by anodizing at 10 V in glycerol electrolyte containing 0.6 mol dm−3 K2HPO4 and 0.2 mol dm−3 K3PO4 in a temperature range of 428–453 K. The microcones appeared after prolonged anodizing, but the required time was largely reduced by increasing electrolyte temperature. The anodic oxide was initially amorphous at all temperatures, but crystalline oxide nucleated during anodizing. The anodic oxide microcones, which were crystalline, appeared on surface as a consequence of preferential chemical dissolution of initially formed amorphous oxide. The chemical dissolution of an initially formed amorphous layer was accelerated by increasing the electrolyte temperature, with negligible influence of the temperature on the morphology of microcones up to 448 K.
Type: article (author version)
URI: http://hdl.handle.net/2115/47410
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 幅崎 浩樹

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