Abstract
The effect of Pb content cariation on microstructure, phase evolution, Bi-2223 grain growth and critical current density (J c) of silver sheathed Bi-2223 tapes has been studied. The results indicate that high Pb content samples have higher conversion rate of Bi-2212 to Bi-2223 than low Pb content samples. However, too high Bi-2223 formation rate is not beneficial to Bi-2223 grain growth and thus the achieved critical current density in the tapes. The influence of coarse particles in precursor powder on the phase formation has also been investigated.
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