AG (BI, PB)-SR-CA-CU-O SUPERCONDUCTING TAPE PROCESSING - SOLID-STATE CHEMISTRY ASPECTS/

Different preparation methods have been used to obtain starting powder s used in the fabrication of composite tapes by the powder-in-tube met hod. The effect of these distinct starting powders on the superconduct ing properties of Ag/Bi-Sr-Ca-Cu-O monofilament tapes has been investi gated. The changes in the physical properties, including the critical current density at 77 K and ac magnetic susceptibility, and microstruc ture, using optical and electronic microscopy, have been analyzed in r elation to the solid state reactions involved in the Bi2Sr2CaCu2O8+del ta and Bi2Sr2Ca2Cu3O10+delta phase transformations.