High performance new MgB2 superconducting hollow wires

TL;DR

This paper introduces a new manufacturing technique for MgB2 superconducting hollow wires, demonstrating promising superconducting properties suitable for applications at 15-30 K and medium-high magnetic fields.

Contribution

A novel, scalable manufacturing process for MgB2 hollow wires using conventional wire techniques, applicable to both monofilamentary and multifilamentary structures.

Findings

Superconducting properties measured up to 30 K and in magnetic fields.

Wires show promising superconductivity in 15-30 K range.

Technique enables long wire production with consistent quality.

Abstract

MgB2 hollow wires have been produced with a new technique which uses a conventional wire manufacturing process but is applied to composite billets containing the elemental B and Mg precursors in an appropriate shape. The technique has been applied to the manufacture of both monofilamentary and multifilamentary wires of several tens meters length. The superconducting transport properties of the MgB2 hollow wires have been measured in magnetic field and in the temperature range from 4.2 to 30 K. Promising results are obtained, which indicate the possibility of application of these wires as superconductors in the temperature range of 15-30 K and at medium-high values of magnetic field.