Effect of processing procedure on critical current density of Ag-sheathed (Bi, Pb) 2Sr2Ca2Cu3Ox superconducting tapes

Bi-system tapes were prepared using the powder-in-tube method. The tapes were processed to their final thickness by repeated rolling and pressing and by a combination rolling and pressing with intermediate heat treatment. The different processing techniques greatly affected the critical current density Jc of the tapes because the homogeneity of the ceramic core and the propensity for crack formation within the tapes mainly depended on the deformation process.