Phase relations and conductivity in ZrO2-Sc2O3-La2O3 system

Akihiko Yamaji, Takao Ishii, Masami Kanzaki

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


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 languageEnglish
Pages (from-to)335-337
Number of pages3
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1994
Externally publishedYes
EventProceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA
Duration: Apr 4 1994Apr 8 1994

ASJC Scopus subject areas

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


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