Title :
Processing issues for high critical current density in BSCCO-2212 composites
Author :
Marken, Kenneth R., Jr. ; Miao, Hanping ; Sowa, Joseph M. ; Parrell, Jeffrey A. ; Hong, Seung
Author_Institution :
Oxford Superconducting Technol., Carteret, NJ, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
Issues for controlling the critical current density (Jc) in long tapes and wires include homogeneity of the starting powders, optimization of the ceramic size and shape, uniformity of the deformation or coating processes, and control of the heat treatment parameters. This range of issues is discussed for both multilayer dip-coated and multifilamentary powder-in-tube composites. In particular, Jc is shown to depend strongly on ceramic size and shape. Continuing efforts to correlate Jc with processing issues are presented. Progress toward applications in high field coils is described
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; multifilamentary superconductors; strontium compounds; superconducting magnets; superconducting tapes; BSCCO-2212 composites; Bi2Sr2CaCu2O8; ceramic size; coating processes; deformation; heat treatment parameters; high critical current density; high field coils; high temperature superconductors; homogeneity; long tapes; multifilamentary powder-in-tube composites; multilayer dip-coated composites; processing issues; shape; starting powders; wires; Ceramics; Coatings; Critical current density; Heat treatment; Powders; Process control; Shape control; Size control; Temperature control; Wires;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
