Abstract: The Bi-2223/Ag tapes were prepared with spray-died powders,which are of different particle sizes and phase assemblages by varing the annealing time in pure oxygen.Longer time annenling degraded the reactivity of precursor powder,which in turn resulted in an incomplete cinversion from precursors to Bi-2223,porosity core and misaligned grains in fully processed tapes.The best Jc in short pressed samples varied from29.7 to 47kA/cm^2 for the tapcs made from different powders.

Key words: Bi-2223/Ag tape, precursor powder, critical current density,