Author:
Miao H.,Primo V.,Ibañez R.,Sapiña F.,Beltran A.,Beltran D.
Abstract
ABSTRACTA variation of the solid-state matrix technique has been developed as a
procedure for the preparation of 2223 bismuth superconducting phases
[(Bi,Pb)2Sr2Ca1-nCunO4+2n,
n=3]. The adequate processing of samples of nominal compositions 2223+x
0021, obtained both by this procedure and by the polymer matrix method, has
allowed the modification of the microstructure of the calcium copper excess,
with no noticeable change in that of the 2223 grains. The study of the phase
evolution in the processing of the samples has shown that the formation rate
of the 2223 phase is faster when the particle size of the calcium cuprate is
smaller. A dependence of the intergranular superconducting properties on the
secondary phase is observed, appearing as a maximum in
Jc0/μcer at x=0.2 and x=0.5 for samples prepared by
solid state matrix and polymer matrix methods, respectively.
Publisher
Springer Science and Business Media LLC
Reference10 articles.
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