A New Method for the Preparation of MgB2 Superconducting Tapes

摘要

Superconducting MgB2/Ta tapes with a critical temperature of 38 K have been prepared successfully by a two-step method. Boron/Ta tapes were fabricated by electrophoresis followed by a post-annealing process in magnesium vapour. The critical current density is 1.7 × 104 A/cm2 in zero field at 5K. Scanning electron microscopy and x-ray diffraction analysis reveal a dense flat surface with (101) orientated growth of the MgB2 phase in our MgB2/Ta tapes.