Effects of hydrogen on phase stability of ytterbium doped strontium cerates

Maki Matsuka, Takaaki Sakai, Hiroshige Matsumoto, Roger D. Braddock, Igor E. Agranovski, Tatsumi Ishihara

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The effect of hydrogen on the phase stability of both SrCe0.95Yb0.05O3 - α, (SCYb-5) powder and disk samples in both dry and wet hydrogen atmospheres was investigated. It was found that decomposition of the perovskite phase was especially evident in the disk samples treated in a dry hydrogen atmosphere, probably due to reduction of the tetravalent cerium ions to trivalent cerium ions in the sample. It was interesting to find that the extent of the decomposition of the perovskite phase was most influenced by the status (i.e. either disk or powder form) of the SCYb-5 samples, rather than the temperature or the extent of the reducing atmospheres. The findings of this study indicate that relaxation kinetics may play an important role in the phase stability of perovskite materials.

Original languageEnglish
Pages (from-to)833-835
Number of pages3
JournalMaterials Letters
Volume64
Issue number7
DOIs
Publication statusPublished - Apr 15 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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