Cold Pressing Procedure Influence on Superconducting Properties of Multi-filamentary Bi2223/Ag Tape

During production of multi-filamentary Bi2223/Ag superconducting tape, annealing-cold pressing-annealing procedure is adopted. Pressure, pressing speed, friction coefficient and feed is acted as appraising target for studying, designed test projects by orthogonality. The results exhibited that influence of friction coefficient on the tape critical current I_c valve is very notable, the effect of pressure and feed is inferior, and the influence of pressing speed on the I_c valve is least.