Phase relations and conductivity in ZrO2-Sc2O3-La2O3 system

Akihiko Yamaji; Takao Ishii; Masami Kanzaki

doi:10.1557/proc-346-335

Phase relations and conductivity in ZrO₂-Sc₂O₃-La₂O₃ system

Akihiko Yamaji, Takao Ishii, Masami Kanzaki

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

The oxygen-ion conductor 0.88ZrO₂-0.12Sc₂O₃ has a discontinuous change in ion conductivity at about 660 °C. This change accompanies the structural transition from rhombohedral to cubic phase. Since the high temperature cubic phase shows large ion conductivity, it is of interest to examine whether or not the cubic phase stabilizes in the low temperature region by another dopant. By adding only 0.005 mole % La₂O₃, the cubic phase is stabilized below about 500 °C without any loss of conductivity compared with 0.88ZrO₂-0.12Sc₂O₃. The ion conductivity of cubic stabilized ZrO₂-Sc₂O₃-La₂O₃ system is around 1×10^-1 S/cm at 800 °C. Cubic phase stabilization using second dopant in a ZrO₂-Sc₂O₃ system led to the finding of a fast oxygen-ion conductor in the ZrO₂-Sc₂O₃-La₂O₃ system.

Original language	English
Pages (from-to)	335-337
Number of pages	3
Journal	Materials Research Society Symposium - Proceedings
Volume	346
DOIs	https://doi.org/10.1557/proc-346-335
Publication status	Published - 1994
Externally published	Yes
Event	Proceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA Duration: Apr 4 1994 → Apr 8 1994

ASJC Scopus subject areas

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

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title = "Phase relations and conductivity in ZrO2-Sc2O3-La2O3 system",

abstract = "The oxygen-ion conductor 0.88ZrO2-0.12Sc2O3 has a discontinuous change in ion conductivity at about 660 °C. This change accompanies the structural transition from rhombohedral to cubic phase. Since the high temperature cubic phase shows large ion conductivity, it is of interest to examine whether or not the cubic phase stabilizes in the low temperature region by another dopant. By adding only 0.005 mole % La2O3, the cubic phase is stabilized below about 500 °C without any loss of conductivity compared with 0.88ZrO2-0.12Sc2O3. The ion conductivity of cubic stabilized ZrO2-Sc2O3-La2O3 system is around 1×10-1 S/cm at 800 °C. Cubic phase stabilization using second dopant in a ZrO2-Sc2O3 system led to the finding of a fast oxygen-ion conductor in the ZrO2-Sc2O3-La2O3 system.",

author = "Akihiko Yamaji and Takao Ishii and Masami Kanzaki",

year = "1994",

doi = "10.1557/proc-346-335",

language = "English",

volume = "346",

pages = "335--337",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1994 MRS Spring Meeting ; Conference date: 04-04-1994 Through 08-04-1994",

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TY - JOUR

T1 - Phase relations and conductivity in ZrO2-Sc2O3-La2O3 system

AU - Yamaji, Akihiko

AU - Ishii, Takao

AU - Kanzaki, Masami

PY - 1994

Y1 - 1994

N2 - The oxygen-ion conductor 0.88ZrO2-0.12Sc2O3 has a discontinuous change in ion conductivity at about 660 °C. This change accompanies the structural transition from rhombohedral to cubic phase. Since the high temperature cubic phase shows large ion conductivity, it is of interest to examine whether or not the cubic phase stabilizes in the low temperature region by another dopant. By adding only 0.005 mole % La2O3, the cubic phase is stabilized below about 500 °C without any loss of conductivity compared with 0.88ZrO2-0.12Sc2O3. The ion conductivity of cubic stabilized ZrO2-Sc2O3-La2O3 system is around 1×10-1 S/cm at 800 °C. Cubic phase stabilization using second dopant in a ZrO2-Sc2O3 system led to the finding of a fast oxygen-ion conductor in the ZrO2-Sc2O3-La2O3 system.

AB - The oxygen-ion conductor 0.88ZrO2-0.12Sc2O3 has a discontinuous change in ion conductivity at about 660 °C. This change accompanies the structural transition from rhombohedral to cubic phase. Since the high temperature cubic phase shows large ion conductivity, it is of interest to examine whether or not the cubic phase stabilizes in the low temperature region by another dopant. By adding only 0.005 mole % La2O3, the cubic phase is stabilized below about 500 °C without any loss of conductivity compared with 0.88ZrO2-0.12Sc2O3. The ion conductivity of cubic stabilized ZrO2-Sc2O3-La2O3 system is around 1×10-1 S/cm at 800 °C. Cubic phase stabilization using second dopant in a ZrO2-Sc2O3 system led to the finding of a fast oxygen-ion conductor in the ZrO2-Sc2O3-La2O3 system.

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DO - 10.1557/proc-346-335

M3 - Conference article

AN - SCOPUS:0028603189

SN - 0272-9172

VL - 346

SP - 335

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JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1994 MRS Spring Meeting

Y2 - 4 April 1994 through 8 April 1994

ER -

Phase relations and conductivity in ZrO₂-Sc₂O₃-La₂O₃ system

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