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Influence of the secondary phases and post-annealing on the transport current density of sinter-forged (Bi, Pb)-2223 ceramics*

Published online by Cambridge University Press:  15 May 1998

V. Rouessac ,
G. Poullain ,
J. Provost ,
M. Gomina  and
G. Desgardin
V. Rouessac
Affiliation:
ISMRA, CRISMAT (CNRS UMR 6508), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France ISMRA, LERMAT (CNRS UPRES-A 6004), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
G. Poullain
Affiliation:
ISMRA, CRISMAT (CNRS UMR 6508), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
J. Provost
Affiliation:
ISMRA, CRISMAT (CNRS UMR 6508), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
M. Gomina
Affiliation:
ISMRA, LERMAT (CNRS UPRES-A 6004), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
G. Desgardin
Affiliation:
ISMRA, CRISMAT (CNRS UMR 6508), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
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Abstract

Transport critical current measurements were performed at 77 K on bulk silver-less (Bi, Pb)2Sr2Ca2Cu3O10+x ceramics textured by slow sinter-forging process. The influences of the 85 K superconductive 2212 phase and non-superconductive secondary phases (SrxCa1−x)2PbO4, (Sr,Ca)14Cu24Oy and (SrxCa1−x)2CuO3, are discussed in terms of their amounts, their grain sizes and shapes and their distribution among the 2223 matrix. The importance of the temperature profile and the atmosphere the annealing that follows the sinter-forging process is clearly demonstrated.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 2 , Issue 2 , May 1998 , pp. 145 - 149
Copyright
© EDP Sciences, 1998

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Footnotes

*

This paper was presented at the "4es journées d'études SEE: matériaux superconducteur à haute Tc", held at Caen, the 26 and 27 March 1997.

References

* This paper was presented at the "4es journées d'études SEE: matériaux superconducteur à haute T c", held at Caen, the 26 and 27 March 1997.