Fabrication and properties of high-T/sub c/ tapes and coils made from silver-clad Bi-2223 superconductors

Long lengths of flexible silver-cell Bi-2223 high-T/sub c/ (critical temperature) superconductors have been fabricated by the powder-in-tube technique. By improving process conditions DC transport measurement at liquid helium (4.2 K) and hydrogen (20 K) temperatures yield J/sub c/'s (critical c...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1993-03, Vol.3 (1), p.1127-1130
Main Authors: Haldar, P., Hoehn, J.G., Rice, J.A., Motowidlo, L.R., Balachandran, U., Youngdahl, C.A., Tkaczyk, J.E., Bednarczyk, P.J.
Format: Article
Language:English
Subjects:
Coils
Critical current density
Current measurement
Density measurement
Fabrication
Hydrogen
Nitrogen
Superconductivity
Temperature
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Long lengths of flexible silver-cell Bi-2223 high-T/sub c/ (critical temperature) superconductors have been fabricated by the powder-in-tube technique. By improving process conditions DC transport measurement at liquid helium (4.2 K) and hydrogen (20 K) temperatures yield J/sub c/'s (critical current densities) greater than 10/sup 5/ A/cm/sup 2/ at zero field and exceed 3*10/sup 4/ A/cm/sup 2/ at liquid nitrogen (77 K) temperature in short tape samples. Detailed microstructural analysis and J/sub c/ measurements with applied fields up to 20 T are reported. Coils have been fabricated from 1-m lengths of conductor with J/sub c/'s at 77 K approaching 10/sup 4/ A/cm/sup 2/. Measurements on small pancake coils made from 10-m tapes are also reported.< >
ISSN:1051-8223
1558-2515
DOI:10.1109/77.233356