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The fabrication, microstructure and transport current study of BPSCCO 2223 multi-connected tapes

The fabrication, microstructure and transport current study of BPSCCO 2223 multi-connected tapes
The fabrication, microstructure and transport current study of BPSCCO 2223 multi-connected tapes
The properties of BPSCCO-2223 tapes produced by the oxide powder in tube (OPIT) method with a “multi-connected” core configuration are presented. By using large silver particles (not, vert, similar 80 ?m) up to 50 wt.% in the precursor BPSCCO powder, a multi-connected core with a homogeneous distribution of elongated and aligned silver platelets was obtained in the processed tapes. The samples were sintered at 832°C in air for different times with two intermediate cold-rolling processes and were characterised by transport critical current measurements at 77 K (0 T < B < 0.5 T), XRD, SEM, and optical microscopy. The effect of silver addition on the formation rate of the high-temperature BiPb(2223) phase is presented. The XRD analysis shows a saturation percentage of the BiPb(2223) phase within the core that is not affected by increased sintering time. Although the initial speed of conversion of the BiPb(2223) phase is seen to increase with increasing silver addition, the saturation percentage decreases. Local phase analysis shows a homogeneous distribution of the BiPb(2223) phase throughout the multi-connected tape, in contrast to the significant phase gradient observed in the control tapes without silver addition. For similar processing parameters, the critical current density increases with increasing silver addition (Jc = 20 kAcm?2 at 77 K (B = 0) with 50 wt.% added Ag, compared to Jc = 10 kA cm?2 without Ag).
0921-4534
45-52
Al-Mosawi, M.K.
650b2475-f20f-4d8f-948c-1e28863b10dc
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Sculock, R.G.
4bcfae01-a145-4f19-8683-392e2d7cddd5
Al-Mosawi, M.K.
650b2475-f20f-4d8f-948c-1e28863b10dc
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Sculock, R.G.
4bcfae01-a145-4f19-8683-392e2d7cddd5

Al-Mosawi, M.K., Beduz, C., Yang, Y. and Sculock, R.G. (1996) The fabrication, microstructure and transport current study of BPSCCO 2223 multi-connected tapes. Physica C: Superconductivity and its Applications, 267 (1-2), 45-52. (doi:10.1016/0921-4534(96)00319-X).

Record type: Article

Abstract

The properties of BPSCCO-2223 tapes produced by the oxide powder in tube (OPIT) method with a “multi-connected” core configuration are presented. By using large silver particles (not, vert, similar 80 ?m) up to 50 wt.% in the precursor BPSCCO powder, a multi-connected core with a homogeneous distribution of elongated and aligned silver platelets was obtained in the processed tapes. The samples were sintered at 832°C in air for different times with two intermediate cold-rolling processes and were characterised by transport critical current measurements at 77 K (0 T < B < 0.5 T), XRD, SEM, and optical microscopy. The effect of silver addition on the formation rate of the high-temperature BiPb(2223) phase is presented. The XRD analysis shows a saturation percentage of the BiPb(2223) phase within the core that is not affected by increased sintering time. Although the initial speed of conversion of the BiPb(2223) phase is seen to increase with increasing silver addition, the saturation percentage decreases. Local phase analysis shows a homogeneous distribution of the BiPb(2223) phase throughout the multi-connected tape, in contrast to the significant phase gradient observed in the control tapes without silver addition. For similar processing parameters, the critical current density increases with increasing silver addition (Jc = 20 kAcm?2 at 77 K (B = 0) with 50 wt.% added Ag, compared to Jc = 10 kA cm?2 without Ag).

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Published date: 1996

Identifiers

Local EPrints ID: 21657
URI: https://eprints.soton.ac.uk/id/eprint/21657
ISSN: 0921-4534
PURE UUID: 268394da-3517-4c80-be86-5d663f53470e
ORCID for Y. Yang: ORCID iD orcid.org/0000-0002-3874-6735

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Date deposited: 30 Jan 2007
Last modified: 29 Aug 2019 00:53

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Contributors

Author: M.K. Al-Mosawi
Author: C. Beduz
Author: Y. Yang ORCID iD
Author: R.G. Sculock

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