Abstract
High critical temperature superconducting assembly of 50cm length have been developed using silver sheathed Bi1.8Pb0.4Sr2Ca2.2Cu3Ox superconducting tapes. A critical current of 150A at 77.3K was achieved over 40cm with the resistivity of 4×10-13Ω·m, which was much lower than the resistivity of silver, 3×10-9Ω·m. The average critical current of every 5cm was 177±9.4A. It suggests that the superconducting tapes of 10m length used for the assembly have a uniform transport property. Larger transport current will be attained by increasing the number of strand. Multifilamentary taped superconducting wire showed the good bending strain vs. critical current property. The critical current was decreased by 30% due to about 3% bending strain. Transport current properties of single core taped superconducting wires were stable for 50 times heat cycles between room temperature and 77.3K.
