Rapid synthesis of the Bi(Pb)-2223 110 K superconductor by the EDTA sol-gel method
ABSTRACT EDTA sol-gel methods have previously been employed successfully to synthesize Bi(Pb)-2223 phase. But heat-treatment optimization to transform the precursor solution into the final 2223 powder seems to have been neglected, leading to long heat-treatment times as in the classical powder method. In this paper, a route is proposed to accelerate 2223 phase kinetics formation, by improving calcination, sintering and intermediate grindings. Thus a nearly pure 2223 powder is obtained consecutive to a relatively short total duration of heat treatment.