Hydrogen permeability in Ce0.8Yb0.2O1.9 at high temperatures

Y. Nigara, K. Kawamura, T. Kawada, J. Mizusaki

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

It was found that hydrogen permeated Ce0.8Yb0.2O1.9 (fluorite-type) at 1800-1000 K, which was sintered at 1970 K in air. The tube shaped two specimens were used to measure the hydrogen permeability, JH. Log(JH/mol h-1 cm-1) decreases with reducing temperature and is proportional to reverse temperature at 1800-1500, 1500-1300 and 1200-1000/K. The activation energies were 0.92±0.06, 1.10±0.06 and 0.58±0.05/eV, respectively. Ce0.8Yb0.2O1.9 would be an electron-proton mixed conductor under H2-H2O atmosphere at high temperature.

Original languageEnglish
Pages (from-to)215-221
Number of pages7
JournalSolid State Ionics
Volume136-137
DOIs
Publication statusPublished - 2000 Nov 2

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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