Hollow wires were produced using a new technique which involved a conventional wire manufacturing process but was applied to composite billets containing elemental B and Mg precursors in an appropriate shape. The technique was applied to the manufacture of both monofilamentary and multifilamentary wires of several tens of metres in length. The superconducting transport properties of the MgB2 hollow wires were measured in a magnetic field at 4.2 to 30K. Promising results were obtained, which indicated the possibility of applying these wires as superconductors at 15 to 30K and in medium-to-high magnetic fields.

High Performance New MgB2 Superconducting Hollow Wires. G.Giunchi, S.Ceresara, G.Ripamonti, A.Di Zenobio, S.Rossi, S.Chiarelli, M.Spadoni, R.Wesche, P.L.Bruzzone: Superconductor Science and Technology, 2003, 16, 285-91