Subsolidus phase relations of the SrO-Ta2O5-CuO system at 900 °C in air

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    The subsolidus phase relations of the SrO–Ta2O5–CuO system were investigated in air. The samples were equilibrated at 900 °C. The ternary oxide Sr3Ta2CuO9 compound is stable under these conditions. This phase presents a solid solution range, its actual composition being Sr3Ta2−xCu1+xO9+δ with 0.0 ≤ x ≤ 0.2. Up to about 5 at.% Cu can be incorporated in the Sr3−xTa1+xO5.5+δ phase. Similarities with the SrO–Nb2O5–CuO system are discussed.
    Original languageEnglish
    JournalJournal of Alloys and Compounds
    Issue number1-2
    Pages (from-to)815-818
    Publication statusPublished - 2009


    • Materials research
    • Superconducting materials for the energy sector


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