Effect of pelletization pressure on structural properties and critical current hysteresis of ceramic superconducting Bi1.7Pb0.3Sr2Ca2Cu3O y

The effect of pelletization pressures on structural properties and critical current hysteresis of Bi1.7Pb0.3Sr2Ca2Cu3Oy samples was investigated. The samples used in this study were prepared by classical solid-state reaction at the pressures from 100 up to 500 MPa. The obtained samples were characterized by resistance vs. temperature, (R-T), critical current density vs. applied magnetic field, (Jc-H), material density vs. pressure, (?-P), XRD, SEM, and ED AX. The results of this study showed that the quality of electrical and structural properties of Bi-2223 bulk superconductors strongly depends on the pelletization pressure. Pressing of bulk samples at 400 MPa produces textured grain alignment and associates micro- structural modifications in order to enhance flux pinning and thus increases current carrying capacities.