抄録
Superconducting properties of hot-pressed BiPbSrCaCuO (2223 phase) were studied. The bulk density was obtained to be -6.2 g/cm3 with pressure of 250 kg/cm2 and independent from hot-pressing temperature. The critical current density Jc at 77K was measured by a four-probe method and the value of 2, 600 A/cm2 was obtained. From the magnetization measurements ( by using VSM ), it was supposed that there is a certain correlation between transport properties and grain-growth process. The magnetic shielding effect was improved by using of hot-press method. Furthermore, it turned out that the shielding effect was more improvable by annealing after hot-pressing.
