Texturing of bulk Bi2212/MgO by melt processing in a high magnetic field and effect of post annealing on the critical current densities

Bulk Bi2212 containing 10 wt.% MgO was textured by magnetic melt processing (MMP). Hot forging (HF) applied after MMP slightly increased the critical current density (J(c)). Transport J(c) at 77 K was enhanced by post anneali ng in air and reached 1900 A/cm(2) after argon annealing. The magnetization at 4 K was slightly increased by annealing in air. Using the Bean model, a Jc(m) of 170 kA/cm(2) was calculated at 4 K. Further argon annealing decre ased this value. The strong intergranular junctions obtained by MMP and HF explained the high Jc(m) at 4 K.