The influence of heat treatment on electric properties of bulk (Bi,Pb): 2223 superconductor

摘要

The (Bi,Pb)(Sr,Ba):2223 samples were prepared using different sintering temperatures. The electrical properties were investigated by electrical resistance and V-I characteristics measurements. The increase of sintering temperature induces the decrease of transition width and the increase of intergranular critical current density J(cj) and phase purity. The critical current density from electrical measurement agrees with the results obtained from complex magnetic susceptibility measurements function of temperature and AC field amplitude. [References: 10]