Abstract
Silver-sheathed (Bi,Pb) 2Sr 2Ca 2Cu 3O 10 superconducting tapes with critical current density up to 40,000 A/cm 2 at 77K and 0T have been successfully fabricated through the combination of powder-in-tube technique and a repeated pressing and annealing process. The obtained tapes were characterised in terms of phase analyses, microstructural observations and electrical measurements. The results indicate that pure high-T c phase, high degree of grain alignment and intimate connection between grains are essential for achieving a high current carrying capacity in the Bi-Pb-Sr-Ca-Cu-O superconducting tapes. J c development during the process of heat treatment was related to the high-T c phase formation and microstructural evolution of tapes.
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