The confirmation of phase equilibria in the system ZrOCeO2 below 1400°C

Masahiro Yoshimura, Eiji Tani, Shigeyuki Somiya

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22 Citations (Scopus)


Critical review of the phase diagrams proposed previously suggested incomplete establishment of the phse equilibria in the system ZrO2CeO2 below 1400°C. Application of hydrothermal techniques enabled us to attain the equilibria in this system. The tetragonal SS (solid solution) was no longer stable below 1000°C, where it decomposed into the stable monoclinic SS and cubic SS. The solubility limit of the tetragonal or cubic SS was 23 wt%(18 mol%) CeO2 or 79 wt%(73 mol%) CeO2, respectively at 1400°C. That of the monoclinic or cubic SS was 5 wt%(3.5 mol%) CeO2 or 96 wt%(95 mol%) CeO2, respectively at 800°C. Thermochemical calculation appears to make it possible to predict true equilibria in this system.

Original languageEnglish
Pages (from-to)477-481
Number of pages5
JournalSolid State Ionics
Issue numberC
Publication statusPublished - 1981 Aug

All Science Journal Classification (ASJC) codes

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


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