Suppression of field crystallization of anodic niobia by oxygen

H. Habazaki, T. Ogasawara, H. Konno, K. Shimizu, S. Nagata, K. Asami, K. Takayama, P. Skeldon, G. E. Thompson

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)B173-B177
JournalJournal of the Electrochemical Society
Volume153
Issue number5
DOIs
Publication statusPublished - 2006 Apr 17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Suppression of field crystallization of anodic niobia by oxygen'. Together they form a unique fingerprint.

  • Cite this

    Habazaki, H., Ogasawara, T., Konno, H., Shimizu, K., Nagata, S., Asami, K., Takayama, K., Skeldon, P., & Thompson, G. E. (2006). Suppression of field crystallization of anodic niobia by oxygen. Journal of the Electrochemical Society, 153(5), B173-B177. https://doi.org/10.1149/1.2184909