The effect of core density on the formation of the 2223 phase in (Pb/Bi)2Sr2Ca2Cu3Ox superconducting tapes


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), 593-596. (doi:10.1016/S0011-2275(97)00051-9).

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Description/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.

Item Type: Article
Additional Information: Paper presented at Low Temperature Engineering and Cryogenics Conference 1996
ISSNs: 0011-2275 (print)
Related URLs:
Keywords: Bi-2223, core density, incubation period, formation rate, grain size, heating rate
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 21289
Date Deposited: 17 Nov 2006
Last Modified: 27 Mar 2014 18:10
URI: http://eprints.soton.ac.uk/id/eprint/21289

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