Jc Performance of Ag Sheathed Bi-2223 HTS Composite Conductors
High critical current densities in the commercially interesting Ag sheathed Bi-2223 HTS composite conductors have been achieved using the powder-in-tube (PIT) technique. At 77 K and self-field, average Jc performance of 50,000, 45,500, and 39,700 A/cm2 has been obtained for pressed monofilament, pressed multifilament, and rolled multifilament conductors, respectively. The electrical performance of both rolled and pressed multifilament tapes has been characterized in magnetic fields up to 7 T (B ⊥ tape-plane and B ‖ tape-plane) and in a temperature range from 50 to 85 K. Both samples show conventional exponential magnetic field dependence in the high-field regime. The decrease of Jc with increasing magnetic field for B ‖ tape-plane is found to be less substantial for the rolled tape than for the pressed tape leading to a better Jc retention characteristic for the rolled tape.
KeywordsCritical Current Density Anisotropy Ratio Composite Conductor High Critical Current Density Rolled Tape
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