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Phase Composition and Compatibilities at 930° to 950°C in the System Europium(III) Oxide‐Barium Oxide‐Copper(II) Oxide in Air
Author(s) -
Pleczulewski C. N.,
McAdams J. E.,
Mason T. O.
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb06722.x
Subject(s) - solid solution , europium , solubility , barium , oxide , phase (matter) , ternary operation , materials science , barium oxide , copper , inorganic chemistry , analytical chemistry (journal) , chemistry , luminescence , metallurgy , chromatography , optoelectronics , organic chemistry , computer science , programming language
Phase composition and compatibilites at 930° to 950°C were determined for the system Eu 2 O 3 –BaO–CuO in air. The binary compound Eu 2 CuO 4 dissolves Ba to the extent 0 x 0.02 in Eu 2‐x Ba x CuO 4 , whereas the other binary compounds, Eu 2 BaO 4 and BaCuO 2 , do not exhibit solid solubility. Three ternary compounds were obtained, Eu 2 BaCuO 5 and two solid solution phases. The first contains the 90 K ‘123’ superconductor and has solubility limits represented by Eu 1+x Ba 2‐x Cu 3 O 7±y , where 0 x 0.5. The second has a solubility limit represented as Eu 1+x Ba 8‐x Cu 4 O y , 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 Y 2 O 3 ‐BaO‐CuO system.