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Application of the metallurgical route for synthesis of 110 K Bi-Pb(Sb)-Sr-Ca-Cu-O superconducting oxides

Published online by Cambridge University Press:  03 March 2011

K. Konstantinov ,
D. Michel  and
P. Ochin
K. Konstantinov
Affiliation:
C.N.R.S., C.E.C.M., 94407 Vitry/Seine, France
D. Michel
Affiliation:
C.N.R.S., C.E.C.M., 94407 Vitry/Seine, France
P. Ochin
Affiliation:
C.N.R.S., C.E.C.M., 94407 Vitry/Seine, France
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Abstract

Bulk nearly single phase Bi-2223 materials doped with Pb and Sb were prepared using the metallurgical route. Li-doped samples were also synthesized, but Li leads to the 2212 phase and prevents the formation of the 2223 phase. The dependence of the sintering conditions on the phases obtained was studied and the influence of different factors on the melting temperature and the temperature required for the formation of the 2223 phase is discussed. For the materials with nominal composition Bi1.5Pb0.3Sb0.1Sr2Ca2Cu3Sy, Tc(zero) = 111 K was achieved. It was found that the Sb-rich phase segregates on the surface of the superconducting grains.

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Type
Articles
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Journal of Materials Research , Volume 9 , Issue 11 , November 1994 , pp. 2764 - 2770
Copyright
Copyright © Materials Research Society 1994

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References

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