FABRICATION OF (BIGAPB)2SR2CA2CA2CU3O10-CERAMIC SUPERCONDUCTOR RODS(YGLASS)

Glass samples with a nominal composition of B1.2Ga0.4Pb0.4Sr2Ca2Cu3O10 +y were prepared as rods having a diameter of 13mm and 20cm long by me lt casting technique. Sintering process was performed by applying a di rect current to the glass rods. Three different current application st ages were used and crystallisation of the glass rods were obtained. Th e XRD studies of the material showed that crystallised grains were pre ferably c-axis oriented. The best T-c was obtained at 107K and T-zero was obtained at 101K. These results were also confirmed by the D.C. Su sceptibility measurements. After the optimum processing condition the maximum transport current density was found to be 9700 A/cm(2) at 4.2K .