Fabrication of Ag/Bi2223 multilayer tapes by the ''jelly roll'' method

Multilayered (laminated) tapes consisting of Ag and the Bi2223 phase were prepared by a jelly roll method. The highly oriented structure of the Bi2223 phase is obtained over the whole region of the tape. The J(c) of 8200 A/cm(2), corresponding to an I-c of 14 A, is obtained for rather thick tapes with a thickness of 0.25 mm, which enables easy handling. The thermomechanical treatment enhances J(c) and the maximum value reaches 17200 A/cm(2), corresponding to an I-c of 29.2 A. Therefore, the multilayered microstructure fabricated by the jelly roll method is useful for the production of high J(c) and I-c tapes with the added feature of being easily handled without damage.