Flexible Bi1.81Pb0.43Sr1.71Ca2.14Cu3Ox superconducting tapes have been fabricated by the powder-in-silver tubing technique followed by appropriate sintering. The sintered tape, Jc≳104 A/cm2 at 77 K, can be bent into an arc with a 0.9-cm radius of curvature without deteriorating the transport properties at liquid nitrogen temperature. This indicates that the superconducting a-b plane of the Bi-based tape has a strain of 0.05%–0.1%.
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Chen et al. (1991) studied this question.
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