Subsolidus Phase Relations of the CaO-REOx-CuO Systems (RE = Eu, Tb, Dy, Ho, Er, Lu and Sc) at 900 °C in Air

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The subsolidus phase relations of the CaO-REOx-CuO systems (RE = Eu, Tb, Dy, Ho, Er, Lu and Sc) were investigated in air at 900 °C. The pseudo-ternary sections with RE = Tb, Dy, Ho, Er and Lu have a similar structure. They have in common with the RE = Eu system a solid solution of Ca0.833−xRExCuO2+y composition but the system with RE = Eu differs by the presence of an Eu2CuO4 phase instead of RE2Cu2O5 for RE = Tb, Dy, Ho, Er and Lu. In contrast, the CaO-ScO1.5-CuO section does not contain a Ca0.833−xScxCuO2+y solid solution and is dominated by the CaSc2O4 phase, which has no equivalent in the other systems at 900 °C in air.
Original languageEnglish
JournalJournal of Phase Equilibria and Diffusion
Issue number5
Pages (from-to)601-610
Number of pages10
Publication statusPublished - 2016


  • Air
  • CaO
  • CuO
  • Dy2O3
  • Er2O3
  • Eu2O3
  • Ho2O3
  • Lu2O3
  • Phase diagram
  • Phase equilibria
  • Sc2O3
  • Tb7O12

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