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

doi:10.1016/j.matlet.2010.01.031

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

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Abstract

The effect of hydrogen on the phase stability of both SrCe_0.95Yb_0.05O_{3 - 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 language	English
Pages (from-to)	833-835
Number of pages	3
Journal	Materials Letters
Volume	64
Issue number	7
DOIs	https://doi.org/10.1016/j.matlet.2010.01.031
Publication status	Published - Apr 15 2010

All Science Journal Classification (ASJC) codes

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

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Matsuka, M., Sakai, T., Matsumoto, H., Braddock, R. D., Agranovski, I. E., & Ishihara, T. (2010). Effects of hydrogen on phase stability of ytterbium doped strontium cerates. Materials Letters, 64(7), 833-835. https://doi.org/10.1016/j.matlet.2010.01.031

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title = "Effects of hydrogen on phase stability of ytterbium doped strontium cerates",

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.",

author = "Maki Matsuka and Takaaki Sakai and Hiroshige Matsumoto and Braddock, {Roger D.} and Agranovski, {Igor E.} and Tatsumi Ishihara",

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AU - Matsuka, Maki

AU - Sakai, Takaaki

AU - Matsumoto, Hiroshige

AU - Braddock, Roger D.

AU - Agranovski, Igor E.

AU - Ishihara, Tatsumi

PY - 2010/4/15

Y1 - 2010/4/15

N2 - 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.

AB - 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.

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