Development of Tl-1223 conductors for 77 K HTS applications

Tl-1223 conductors have been fabricated by the powder-in-tube (PIT) and surface-coated conductor (thick film) techniques. Current densities (J/sub c/) of 20,000 A/cm/sup 2/ and 12,000 A/cm/sup 2/ have been achieved at 77 K in short monofilament tapes and meter-long 37-filament tapes respectively. A...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 1997-06, Vol.7 (2), p.1953-1956
Hauptverfasser:	Selvamanickam, V., Pfaffenbach, K., Kirchoff, D., Cardner, K.M., Hazelton, D.W., Haldar, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Coils Conductive films Conductors Critical current Critical current density Current density Electric connection. Cables. Wiring Electrical engineering. Electrical power engineering Exact sciences and technology High temperature superconductors Materials Superconducting transition temperature Testing Thick films Various equipment and components
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Beschreibung
Zusammenfassung:	Tl-1223 conductors have been fabricated by the powder-in-tube (PIT) and surface-coated conductor (thick film) techniques. Current densities (J/sub c/) of 20,000 A/cm/sup 2/ and 12,000 A/cm/sup 2/ have been achieved at 77 K in short monofilament tapes and meter-long 37-filament tapes respectively. A large diameter test pancake coil was successfully fabricated with 17 m long PIT tapes. A new process has been developed to achieve grain alignment in PIT Tl-1223. Critical currents of 18 A and a J/sub c/ of 19000 A/cm/sup 2/ has been achieved at 77 K in surface-coated Tl-1223 conductor fabricated by an industrial process.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/77.620969