Eur. Phys. J. AP
Volume 2, Number 2, May 1998
|Page(s)||145 - 149|
|Published online||15 May 1998|
Influence of the secondary phases and post-annealing on the transport current density of sinter-forged (Bi, Pb)-2223 ceramics*
ISMRA, CRISMAT (CNRS UMR 6508),
6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
2 ISMRA, LERMAT (CNRS UPRES-A 6004), 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
Corresponding author: email@example.com
Accepted: 26 January 1998
Published online: 15 May 1998
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.
PACS: 74.60.Jg – Critical currents / 74.72.Hs – Bi-based cuprates / 81.40. Rs – Electrical and magnetic properties (related to treatment conditions)
© EDP Sciences, 1998
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