Räth, S.; Woodall, L.; Lehmann, M.; Gerards, M.; Schmahl, Wolfgang W.
XRD Rietveld-analysis of PBSCCO-2223 precursor powders used in OPIT processing: Pb2+ solubility in 2212.
In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 III: pp. 2858-2861
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The phase assemblage in PBSCCO precursor powders for 2223-OPIT production has been investigated in a quantitative way with Rietveld analysis of x-ray powder diffractograms. The investigated precursors were made by spray pyrolysis of solutions of the appropriate bulk chemical composition of Pb0.33Bi1.80Sr1.87Ca2.00Cu3.00O10+δ, and subsequent calcination to remove volatile elements and to form a suitable precursor phase assemblage at temperatures between 800°C and 820°C, in air or under reducing conditions. The influence of temperature and atmosphere on the powder quality was investigated with regard to different minor phases, and the Pb-content of the 2212-phase.