(Bi,Pb)SrCaCuO System에서 분말 소결 및 2차 성형의 영향

Effects of Powder Sintering and 2nd, Pressing in (Bi,Pb)SrCaCuO System

Effects of powder sintering and 2nd, pressing on the superconducting characteristics in the (Bi,Pb)SrCaCuO system have been studied. The sample prepared by the powder sintering process had a porous microstructure with a $T_c$ below 77 K, while the sample prepared by 2nd. pressing process had highly oriented microstructure with a $T_c$ above 100 K. The critical current density($J_c$) was relatively improved in the sample prepared by the 2nd. pressing process. But the value of $J_c$ is cosiderably low in practical use.