Progress in BSCCO-2212/silver composite tape conductors

Ceramic-silver composite conductors have been fabricated in lengths greater than 200 meters using both powder-in-tube and dip-coated methods. Progress has been made in conductor uniformity through control of process steps including powder packing, tape coating, deformation, and heat treatment. Critical current density (J(c)) in lengths up to 100 meters has been evaluated by measuring end to end current in coils, both pancake wound and solenoid wound. These coils mere made using a wind-and-react technique. J(c) values greater than 10(5) A/cm(2) have been attained over 17 m lengths of conductor in these coils in self field at 4.2 K. The magnetic field dependence of 4.2 K J(c) in fields as high as 17 T will be reported for these coils. Microstructural factors affecting J(c) are discussed.