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Suppression of Field Crystallization of Anodic Niobia by Oxygen

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Title: Suppression of Field Crystallization of Anodic Niobia by Oxygen
Authors: Habazaki, H.1 Browse this author →KAKEN DB
Ogasawara, T. Browse this author
Konno, H. Browse this author
Shimizu, K. Browse this author
Nagata, S. Browse this author
Asami, K. Browse this author
Takayama, K. Browse this author
Skeldon, P. Browse this author
Thompson, G. E. Browse this author
Authors(alt): 幅崎, 浩樹1
Issue Date: 27-Mar-2006
Publisher: Electrochemical Society
Journal Title: Journal of the Electrochemical Society
Volume: 153
Issue: 5
Start Page: B173
End Page: B177
Publisher DOI: 10.1149/1.2184909
Abstract: Solid-solution Nb–O films containing up to 50 atom % oxygen, prepared by magnetron sputtering, were used to investigate the influence of the oxygen on field crystallization during anodizing at 100 V in 0.1 mol dm(-3) ammonium pentaborate electrolyte at 333 K. The findings reveal that field crystallization is hindered dramatically by addition of 20 atom % oxygen to the substrate, while no crystallization occurs for a Nb–50 atom % O substrate. Prior thermal treatment accelerates field crystallization of niobium, but not the Nb–50 atom % O substrate. The thermal treatment is considered to promote generation of precursor sites for crystal nucleation. However, sufficient oxygen in the substrate may restrict precursor development and/or reduce the compressive stresses in the amorphous anodic niobia that can facilitate crystal growth.
Rights: Copyright © 2006 The Electrochemical Society
Type: article
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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