Transport a.c. losses of (Bi,Pb)-2223 multifilamentary tapes with Ca-Cu-O as resistive barrier

By means of doping Ca2CuO3 powders into the Ag-sheathed (Bi,Pb)-2223 tape, we found that the Ca2CuO3 powder has little side effect on the J(c) values of the investigated tapes. So the Ca2CuO3 powder as resistive barriers betw een filaments was introduced into the (Bi,Pb)-2223 multifilamentary tape by powder-in-tube method. A rectangular deformation process by using a four-r ollers machine has been applied to prepare the wires. The results indicate that the transport a.c. losses were decreased by introduction of the resist ive barrier, while the J(c) of the tape with barriers was almost not deteri orated compared with the tape without barriers. (C) 2001 Elsevier Science B .V. All rights reserved.