Critical-current density of Pb-doped Bi-Sr-Ca-Cu-O superconductors synthesized by a hot-press method.

Synthetic conditions of Pb-dopet Bi-Sr-Ca-Cu-O oxide superconductors produced by a techniqueof a uniaxial hot-press method were investigated.The quality of samples was evaluated by mean of X-ray, SEM, density and magnetic measurements.The transport Jc observed by resistive transition at 77.3K was 7,000A/cm2 at H=10 Oe for the hot-pressed sample.