Abstract
Among the superconducting phases of bismuth-based Bi–Sr–Ca–Cu–O, compound Bi2Sr2Ca2Cu3O10+δ (Bi-2223) is the most interesting because of its relatively high critical temperature (T C =95–110 K) and numerous applications. However, this phase is also known for its low stability and the difficulty of purifying parasites phases including the Bi-2212. To this end, the Pb used in relatively high proportions can stabilize, purify, and improve the further enhancement of T C . The influence of Pb on structural, superconducting and magnetic properties has been extensively investigated in polycrystalline Bi2−x Pb x Sr2Ca2Cu3O10+δ ceramics (0<x<1). For low Pb amounts, structural analysis shows that the Bi-2223 phase is difficult to achieve without the Bi-2212 phase, and for high Pb content a large fraction of secondary phases containing Pb is detected. Our results confirm that the optimal Pb content for obtaining a Bi-2223 single phase is x=0.3, 0.4.
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Mahtali, M., Chamekh, S. Superconductive and Magnetic Properties of Bi2Sr2Ca2Cu3O10+δ Ceramics Doped by Pb. J Supercond Nov Magn 24, 351–355 (2011). https://doi.org/10.1007/s10948-010-1008-1
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DOI: https://doi.org/10.1007/s10948-010-1008-1