Title :
Effect of Filament Configuration on Critical Current Density of Bi2212/Ag Wires With Low Ag Ratio
Author :
Kim, Sang-Cheol ; Ha, Dong-Woo ; Oh, Sang-Soo ; Han, Il-Yong ; Oh, Jae-Geun ; Sohn, Ho-Sang
Author_Institution :
Nexans Korea Ltd., Cheongwon
fDate :
6/1/2008 12:00:00 AM
Abstract :
Effect of filament configuration and heat treatment of Bi2212/Ag round wire with low Ag ratio on the engineering critical current density (Je) was reported. We have fabricated 557, 85 7, and 121 7 wires with different Ag ratio and evaluated at various wire diameters. We have also changed the parameters of heat treatment. The effects of maximum process temperature (Tmax)and soaking time at Tmax and average filament diameter on the Je were also studied. 121 7 wire of 0.95 mm diameter heat-treated at showed Je of 858mm2 at 4.2K, 0 T.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); heat treatment; high-temperature superconductors; lead compounds; silver; strontium compounds; Bi2212/Ag wires; BiPbSr2Ca2Cu3O10-Ag; critical current density; filament configuration; heat treatment; magnetic flux density 0 T; maximum process temperature; soaking time; temperature 4.2 K; Bi2212/Ag wire; critical current density; multi-filamentary wire; powder-in-tube;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2008.920765