Abstract
AbstractPhase equilibria in the ½ Sm2O3–BaO–½ Fe2O3 system were systematically studied at 1100°C in air. Two individual compounds: Sm1.875Ba3.125Fe5O15‐δ and Ba3SmFe2O7.5+δ have been detected in the studied system at 1100°C in air. One more complex oxide with double perovskite structure SmBaFe2O5+w has been obtained under reduced oxygen partial pressure. Thermodynamic stability of SmBaFe2O5+w and its thermal stability in metastable state in air were determined. The subsolidus phase diagram for the ½ Sm2O3 – BaO – ½ Fe2O3 system at 1100°C in air has been constructed.
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