ELECTRICAL AND MAGNETIC CHARACTERIZATION OF HOT-EXTRUDED BSCCO TAPE SAMPLES

Ag/BSCCO-2223 phase tapes were prepared with a new plastic deformation cycle. Starting from the hot extrusion of composite billets, hundreds of metres of tape 0.15 x 3 mm were obtained by drawing and rolling th e extruded bars. The cross-section, monofilamentary with a central Ag insert, is quite regular along all the length. Samples from 30 cm to 1 00 cm in length were heat-treated at different temperatures between 83 0 degrees C and 480 degrees C in Ar + 10% O-2 atmosphere. Electrical-t ransport properties were tested at 77 K. J(c) of 3000 A/cm(2) were usu ally achieved after first heat treatment. The superconducting properti es were also tested by magnetic measurements using a vibrating sample magnetometer.