Effect of precursor phase composition on 2223 phase formation in Ag-sheathed tapes

Metastable phase states of BPSCCO 2223 precursor were studied as a function of annealing temperature, time, and oxygen partial pressure. Reproducible, but path-dependent changes in precursor phase composition during annealing are mostly governed by changes in Pb solubility in the (Bi,Pb)2212 phase....

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.2499-2502
Hauptverfasser:	Rikel, M.O., Wolf, A., Arsac, S., Zimmer, M., Bock, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	2223 formation kinetics Annealing ANNEALING PROCESSES ANNEALING TEMPERATURE Applied sciences BPSCCO precursor Conducting materials Conductors Customers Electrical engineering. Electrical power engineering Electronics Exact sciences and technology Fabrication HEAT TREATING Heat treatment Kinetic theory Materials Metastasis Phase composition phase equilibria PHASES Powders Precursors Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Silver Superconducting devices Superconducting tapes SUPERCONDUCTIVITY SUPERCONDUCTORS TAPE Temperature
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Zusammenfassung:	Metastable phase states of BPSCCO 2223 precursor were studied as a function of annealing temperature, time, and oxygen partial pressure. Reproducible, but path-dependent changes in precursor phase composition during annealing are mostly governed by changes in Pb solubility in the (Bi,Pb)2212 phase. Studying phase formation upon heat treatment of tapes made by Nexans customers, we found that BPSCCO phase composition affects melting behavior of (Bi,Pb)2223/Ag tapes, phase recrystallization upon heating, and early stages of Bi2223 phase formation.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2005.847503