Title :
Fabrication and characterisation of superconducting Bi-2223/Ag tapes with high critical current densities in km lengths
Author :
Han, Z. ; Bodin, P. ; Wang, W.G. ; Bentzon, M.D. ; Skov-Hansen, P. ; Goul, J. ; Vase, P.
Author_Institution :
Nordic Supercond. Technol., Brondby, Denmark
fDate :
6/1/1999 12:00:00 AM
Abstract :
Long length Bi-2223/Ag tapes with high critical current densities are needed for large-scale applications. In this paper, recent results from NST are being presented, describing recent results reaching critical current densities of 23 kA/cm/sup 2/ and engineering critical current densities of 5.2 kA/cm/sup 2/ at 77 K over the whole length of a 1250 metre long Bi-2223/Ag tape. To our knowledge this is the highest critical current density reported for Bi-2223/Ag tapes longer than 1 km. The approach for improving the homogeneity and the considerations of processing and handling the long length tape are presented. Various Ag alloy sheathed Bi-2223 tapes have been made by our standard production line. The properties of these tapes are compared.
Keywords :
bismuth compounds; calcium compounds; ceramics; composite superconductors; critical current density (superconductivity); high-temperature superconductors; lead compounds; materials preparation; scanning electron microscopy; silver; strontium compounds; superconducting tapes; (BiPb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O-Ag; 1250 m; 77 K; fabrication; high critical current densities; homogeneity; large-scale applications; superconducting Bi-2223/Ag tapes; Critical current; Critical current density; Fabrication; Laboratories; Large-scale systems; Powders; Production; Scanning electron microscopy; Superconducting films; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
