The effect of core density on the formation of the 2223 phase in (Pb/Bi)2Sr2Ca2Cu3Ox superconducting tapes
The effect of core density on the formation of the 2223 phase in (Pb/Bi)2Sr2Ca2Cu3Ox superconducting tapes
The effect of core density on the processing of superconducting tapes has been investigated. Tapes were prepared with different ‘as-rolled’ densities, but all other mechanical and thermal parameters remained the same. The precursor powder used had a nominal stoichiometry of Bi1.84Pb0.34Sr1.34Ca2.03Cu3.06Ox, doped with 15% Ag by weight prepared by Merck Ltd. The ‘as-rolled’ tapes had Vickers' microhardness numbers, Hv, of 90 and 180 kg mm?2. The local 2223 phase formation across the thickness of the core was studied in tapes of these core densities by sintering them at 818 °C for various times in an atmosphere of 7.5% O2. XRD analysis revealed that low density tapes formed the 2223 phase considerably faster than high density tapes. For example, after 10 h of sintering, the low and high density tapes had a 45% and 3% 2223 phase content at the centre of the core, respectively.
Bi-2223, core density, incubation period, formation rate, grain size, heating rate
593-596
Fisher, S.J.
da3be166-e77b-4c73-8523-85b5614b8744
Al-Mosawi, M.K.
650b2475-f20f-4d8f-948c-1e28863b10dc
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
1997
Fisher, S.J.
da3be166-e77b-4c73-8523-85b5614b8744
Al-Mosawi, M.K.
650b2475-f20f-4d8f-948c-1e28863b10dc
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Fisher, S.J., Al-Mosawi, M.K., Beduz, C. and Yang, Y.
(1997)
The effect of core density on the formation of the 2223 phase in (Pb/Bi)2Sr2Ca2Cu3Ox superconducting tapes.
Cryogenics, 37 (10), .
(doi:10.1016/S0011-2275(97)00051-9).
Abstract
The effect of core density on the processing of superconducting tapes has been investigated. Tapes were prepared with different ‘as-rolled’ densities, but all other mechanical and thermal parameters remained the same. The precursor powder used had a nominal stoichiometry of Bi1.84Pb0.34Sr1.34Ca2.03Cu3.06Ox, doped with 15% Ag by weight prepared by Merck Ltd. The ‘as-rolled’ tapes had Vickers' microhardness numbers, Hv, of 90 and 180 kg mm?2. The local 2223 phase formation across the thickness of the core was studied in tapes of these core densities by sintering them at 818 °C for various times in an atmosphere of 7.5% O2. XRD analysis revealed that low density tapes formed the 2223 phase considerably faster than high density tapes. For example, after 10 h of sintering, the low and high density tapes had a 45% and 3% 2223 phase content at the centre of the core, respectively.
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Published date: 1997
Additional Information:
Paper presented at Low Temperature Engineering and Cryogenics Conference 1996
Keywords:
Bi-2223, core density, incubation period, formation rate, grain size, heating rate
Identifiers
Local EPrints ID: 21289
URI: http://eprints.soton.ac.uk/id/eprint/21289
ISSN: 0011-2275
PURE UUID: 6d5739e6-db3b-42ca-8c6e-d7e96432d453
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Date deposited: 17 Nov 2006
Last modified: 16 Mar 2024 02:44
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Contributors
Author:
S.J. Fisher
Author:
M.K. Al-Mosawi
Author:
C. Beduz
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