Synthesis and characterization of fine and homogeneous BSCCO-2223 precursor powder by spray pyrolysis process for PIT process

摘要

Homogeneous and fine BSCCO precursor powders were prepared by spray pyrolysis (SP) method starting from an aqueous solution of metal nitrates. The influence of solution concentration, furnace reaction temperature and types of spray on microstructure and average particle size were investigated. The synthesized precursor powders had a narrow particle size distribution and low carbon content. The reactivity of precursor powder by SP method is very high, attributed to the fine and narrow particle size distribution of precursor powders. The precursor powder by SP method promoted a very quick formation of the 2223 phase for short sintering time. The XRD result shows high possibility of reducing secondary phases such as large AEC and almost phase pure microstructure through more homogeneous reaction.