Phase composition and compatibilities at 930°C to 950°C in the system europium (III) oxide-barium oxide-copper(II) oxide in air

C. N. Pieczulewski, J. E. McAdams, Thomas O Mason

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Phase composition and compatibilities at 930° to 950°C were determined for the system Eu2O3-BaO-CuO in air. The binary compound Eu2CuO4 dissolves Ba to the extent 0 ≤ x ≤ 0.02 in Eu2-xBaxCuO4, whereas the other binary compounds, Eu2BaO4 and BaCuO2, do not exhibit solid solubility. Three ternary compounds were obtained, Eu2BaCuO5 and two solid solution phases. The first contains the 90 K '123' superconductor and has solubility limits represented by Eu1+xBa2-xCu3O7±y, where 0 ≤ x ≤ 0.5. The second has a solubility limit represented as Eu1+xBa8-xCu4Oy, where 0 ≤ x ≤ 0.44. The limited solid solution range of this phase provides insight concerning the probable solid solution range of the analogous phase in the Y2O3-BaO-CuO system.

Original languageEnglish
Pages (from-to)3088-3090
Number of pages3
JournalJournal of the American Ceramic Society
Issue number10
Publication statusPublished - Oct 1990


ASJC Scopus subject areas

  • Ceramics and Composites

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