Electrical-Properties Of Bi-2223 Ag Hot Extruded Tapes - Comparison Between Short And Long Specimens
CRYOGENICS(1994)
Abstract
Long Bi-2223/Ag tapes were successfully fabricated by means of hot extrusion and repeated cold-rolling and sintering processes. On short pressed tapes, after the third thermomechanical cycle, critical current densities J(c) as high as 36 kA/cm(2) at 77 K and 64 kA/cm(2) at 65 K, 0 T were achieved. On 5 m long tapes J(c) values higher than 10 kA/cm(2) at 77 K, 0 T were obtained. The I-c uniformity of long tapes was found to be within 10% for all the investigated regions.
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Key words
hot extruded tapes,electrical properties
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