Article

Rapid synthesis of the Bi(Pb)-2223 110 K superconductor by the EDTA sol-gel method

University of Caen
Journal of Materials Science (impact factor: 2.02). 12/1995; 31(13):3387-3390. DOI:10.1007/BF00360738

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.

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Keywords

2223 phase kinetics formation
 
consecutive
 
heat-treatment optimization
 
precursor solution
 
short total duration
 
sintering