Title :
Microstructures and DC critical currents in textured Y-Ba-Cu-oxides
Author :
Orehotsky, J. ; Wisemann, H. ; Moodenbaugh, A.R. ; Suenaga, M. ; Wang, H.-G. ; Herman, H.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
Sintered bars of Y-Ba-Cu oxide were partially melted using a quartz halogen lamp zone heating apparatus. The resulting multiphase samples showed varying degrees of melt texturing. It was found that the addition of YBa2CuO5 powders to the sintered YBa 2Cu3O7 prior to the zone melting process enhanced the growth of large textured grains. The best value of the critical current density was ~103 A/cm2 at 1.0 T and 77 K for the starting composition of YBa2Cu3O7-(0.2)Y2BaCuO5
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; sintering; yttrium compounds; DC critical currents; YBa2Cu3O7; YBa2CuO5; critical current density; high temperature superconductor; melt texturing; multiphase samples; partially melted; sintered; zone melting process; Bars; Cooling; Critical current; Critical current density; Grain boundaries; Heating; Lamps; Microstructure; Powders; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
