Oxygen ion conductivity of yttria-niobia mixed oxide with fluoride related structure

Tatsumi Ishihara, Keiji Sato, Yukako Mizuhara, Yusaku Takita

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The oxygen ion conductivity of Y2O3Nb2O5 with a fluorite-like structure was studied. Substitutional solid solutions of Nb2 O5 in Y2O3 lattice formed the defect fluorite phase and remarkably enhanced the oxygen ion conductivity. Doping with tetravalent cations, especially Ti4+ or Ce4+, in yttria-niobia oxide is effective in enhancing the oxygen ion conductivity. Although the n-type semiconducting property appeared below PO2 = 10-18 atm at 1243 K, the yttria-niobia mixed oxide doped with Ce4+, Ti4+, and Zr4+ stably exhibited oxygen-ion conduction in the wide range of oxygen partial pressures studied.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalSolid State Ionics
Issue number3-4
Publication statusPublished - Feb 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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