MANUFACTURE OF SPECIFIC BSCCO POWDER COMPOSITIONS BY COPRECIPITATION

A co-precipitation process for large-scale manufacture of bismuth-base d HTSC powders has been demonstrated. Powders manufactured by this pro cess have a high phase purity and precisely reproducible stoichiometry . Controlled time and temperature variations are used to convert precu rsors to HTSC compounds and to obtain specific particle-size distribut ions. The process has been demonstrated for a variety of compositions in the BSCCO system. Electron microscopy, X-ray diffraction, inductive ly coupled plasma spectroscopy and magnetic-susceptibility measurement s are used to characterize the powders.