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

Tatsumi Ishihara; Keiji Sato; Yukako Mizuhara; Yusaku Takita

doi:10.1016/0167-2738(92)90223-C

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

Tatsumi Ishihara, Keiji Sato, Yukako Mizuhara, Yusaku Takita

Research output: Contribution to journal › Article

12 Citations (Scopus)

Abstract

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 P_O2 = 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 language	English
Pages (from-to)	227-231
Number of pages	5
Journal	Solid State Ionics
Volume	50
Issue number	3-4
DOIs	https://doi.org/10.1016/0167-2738(92)90223-C
Publication status	Published - Jan 1 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/0167-2738(92)90223-C

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Ishihara, T., Sato, K., Mizuhara, Y., & Takita, Y. (1992). Oxygen ion conductivity of yttria-niobia mixed oxide with fluoride related structure. Solid State Ionics, 50(3-4), 227-231. https://doi.org/10.1016/0167-2738(92)90223-C

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abstract = "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.",

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AU - Ishihara, Tatsumi

AU - Sato, Keiji

AU - Mizuhara, Yukako

AU - Takita, Yusaku

PY - 1992/1/1

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N2 - 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.

AB - 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.

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