The Manufacture of High Temperature Superconducting Tapes and Films

TL;DRAbstract

<p>An investigation has been carried out on aspects of the manufacture of high temperature superconducting films. Initially, a study was made of tapes manufactured, from the recently discovered thallium-based superconducting material, (Tl<sub>0.6</sub>Pb<sub>0.2</sub>Bi<sub>0.2</sub>)(Sr<sub>1.8</sub>Ba<sub>0.2</sub>)Ca<sub>2</sub>Cu<sub>3</sub>O<sub>9+δ</sub>, via a powder-in-tube technique. Particular attention was paid to the microstructural evolution of the tapes' core with temperature. It was found that the platelet-like as-prepared powder formed superconducting tapes that displayed partial texturing, a feature not before observed in thallium-based tapes of this kind. The synthesised powder had an excellent intra-grain critical current density of 6.5 x 10<sup>4</sup> A cm<sup>-2</sup> in an applied magnetic field of 1 T, at 77 K, with a supercondu

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