Manufacture of Bi, Pb-Sr-Ca-Cu-O pellet disc using wet method

Abstract

Abstract.A confirmation of favorable properties of pellet disc of HTSBPSCCO is required in order to optimally do subsequent process of powder-in-tube (PIT) fabricated intosuperconductor wires. Wet method is a simple method in fabricating superconductor wire when it comes to mass production. In order to optimize this method, temperature parameter holds a decisive role in the formation of the 2223 phase of BPSCCO. We have synthesized two samples using wet method with the sintering temperature of 855 0 C and 865 0 C for 90 hours in air atmosphere.XRD analysis points out the formation of Bi-2223 phase of the sample with the sintering temperature of 855°C, whereas Bi-2212 phase is detected in the one with the sintering temperature of 865 0 C. The surface morphology of both samples are layers-like. According to temperature dependence of resistivity measurement results, both samples have superconductivity behavior below critical temperature (Tc). The former one (T sintering = 855 0 C ) has conductive-like behavior above Tcof whichits resistivity starts to drop at 112K and reaches zero resistivity at 78K, and the latter one (T sintering = 865 0 C )has semiconductor-like behavior of whichits resistivity starts to drop at 82K and then reaches zero resistivity at 48K.