Field dependence of transport J/sub c/ for MgB/sub 2/ superconducting wire by suspension spinning

Abstract

The field dependence of transport or MgB 2 superconducting wire by suspension spinning was examined at 4.2 K in magnetic field up to 10 T. The suspension spinning of commercially available MgB 2 powder was examined to fabricate a long superconducting MgB 2 wire. The as-drawn filaments were pressed and pyrolyzed to remove volatile components. The filamentary samples were then cold-pressed, enveloped by an iron sheet with a pellet of mixed powder of Mg and B or with Mg powder, and vacuum-sealed in a fused quartz tube and sintered. The of the sample was strongly dependent on the starting materials and sintering condition. Although the transport value was low such as 4500 A/cm 2 at 4.2 K and self-field, the value of more than 200 A/cm 2 was maintained by applying the field of 10 T.Index Terms-Field dependence of transport , filamentary MgB 2 , suspension spinning.

SiC addition for MgB/sub 2/ superconducting wire by suspension spinning

“…We have developed a fabrication of superconducting filaments by a suspension spinning method to provide a simple manufacturing process for wire making with good process-ability [5]- [7]. Chemical doping in the filamentary superconductors was examined to enhance the flux pinning.…”