Study of calcination and sintering repetition of Pb-doped Bismuth-based high Tc superconductors by structural analyses

In this work, we present XRD and SEM analyses of the superconducting Bi1.7Pb0.3Sr2Ca2Cu3Oy samples prepared by the conventional solid state reaction method in four different preparation regimes involving combinations of once and twice calcining in 800 °C with a duration of 20 hours and once and twice sintering in 850 °C with a duration of 150 hours. We determine the volume fraction of the desired high Tc phases in the bulk samples and discuss the effects of repetition of calcination and sintering in these four regimes by these structural analyses.In this work, we present XRD and SEM analyses of the superconducting Bi1.7Pb0.3Sr2Ca2Cu3Oy samples prepared by the conventional solid state reaction method in four different preparation regimes involving combinations of once and twice calcining in 800 °C with a duration of 20 hours and once and twice sintering in 850 °C with a duration of 150 hours. We determine the volume fraction of the desired high Tc phases in the bulk samples and discuss the effects of repetition of calcination and sintering in these four regimes by these structural analyses.