Title :
Advances in fabrication of Ag-clad Bi-2223 superconductors
Author :
Balachandran, U. ; Lelovic, M. ; Prorok, B.C. ; Eror, N.G. ; Selvamanickam, V. ; Haldar, P.
Author_Institution :
Argonne Nat. Lab., IL, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
Powder-in-tube (PIT) processing was used to fabricate multifilamentary Ag-clad Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub y/ (Bi-2223) superconductors for various electric power applications. The transport current properties of long lengths of multifilament tapes were enhanced by increasing the packing density of the precursor powder, improving the mechanical deformation, and adjusting the cooling rate. The dependence of the critical current density on magnetic field and temperature for the optimally processed tapes was measured. J/sub c/ was >10/sup 4/ A/cm/sup 2/ at 20 K in magnetic fields up to 3 T and parallel to the c-axis, which is of interest for use in refrigerator-cooled magnets.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; multifilamentary superconductors; powder technology; silver; strontium compounds; superconducting magnets; superconducting tapes; 0 to 3 T; 20 K; Ag-clad Bi-2223 superconductors; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O-Ag; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub y/; cooling rate; critical current density; electric power applications; fabrication advances; high temperature superconductors; mechanical deformation; multifilament tapes; multifilamentary superconductors; optimally processed tapes; packing density; powder-in-tube processing; precursor powder; refrigerator-cooled magnets; transport current; Bismuth; Cooling; Critical current density; Fabrication; Magnetic field measurement; Mechanical factors; Multifilamentary superconductors; Powders; Strontium; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
