SILVER-SHEATHED BI-2223 TAPES - THE STATE-OF-THE-ART

At present, rolled multifilamentary Bi-2223/Ag tapes exhibiting J(c) > 50 kA cm(-2) at 77 K are fabricated, making them the most favourable candidates for the fabrication of high-temperature superconductor (HTS ) conductors for power applications. In this paper the fabrication pro cess of long Bi-2223/Ag tapes by the powder-in-tube technique is prese nted and discussed with the aim of surveying the influence of some sel ected process parameters on the properties of final conductors. J(c) l imitations in HTSs are discussed and some of the possible applications of Bi-2223/Ag or Bi-2212/Ag tapes are briefly presented.