THE COMBINATION OF THE POLYMERIC SOLUTION-SOL-GEL PROCESS AND COMBUSTION SYNTHESIS TO MANUFACTURE BIPBSRCACUO POWDER

The polymeric solution-sol-gel (SSG) process has been greatly improved by combination of the high homogeneity of SSG and the high efficiency of combustion synthesis to manufacture BiPbSrCaCuO powder with high h omogeneity, ultrafine particles and low carbon content for fabrication of high-J(c) silver-sheathed bismuth-based 2223 superconducting tape. The improved SSG, termed solution-sol-gel-SHS (SSGS), is realized by ignition of homogeneous wet gel derived from polymeric SSG. X-ray diff raction (XRD), scanning electron microscopy (SEM) and Fourier transfor m infared spectroscopy (FTIR) are used to optimize the SSG process and investigate the mechanism of the SSG transition.