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 |
| Item ID: | 21289 |
| Date Deposited: | 17 Nov 2006 |
| Last Modified: | 02 Mar 2012 11:45 |
| Contributors: | Fisher, S.J. (Author) Al-Mosawi, M.K. (Author) Beduz, C. (Author) Yang, Y. (Author) |
| Date: | 1997 |
| Additional Information: | Paper presented at Low Temperature Engineering and Cryogenics Conference 1996 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/21289 |
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