Abstract
High quality stoichiometric Bi-2212 precursors purchased from commercial producers where analysed and samples partial melt processed thereof. The critical current densities ( j c) achieved were between 3000 and 5000 A/cm 2, despite identical processing sequence including the peritectic decomposition to the high temperature phases and consequent crystallization to Bi 2Sr 2Ca 1Cu 2O 8+ δ (Bi-2212). A series of powder properties that influence j c in the final product were found. The heating rate in the temperature range 550–850 °C, when heating to the partial melt state, has a strong influence on the j c of the fully processed material. This behaviour could be correlated to particle growth and the reduction of precursor imperfections that acting as nuclei for the peritectic decomposition.
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