Abstract:DTA and XRD measurements were carried Out with reactive precursors taken from the YO 1.5-BaO--CuO system in order to investigate mechanisms of YBa2Cu307_ x formation. The reactions taking place depend strongly on phase composition, phase purity, powder size and heating rate. Among the examined reactive precursors a mixture of 7Y203+22BaCuO2+10CuO turned out as the most suited for melt-processing.
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