high tc wechselstrommehrkernsupraleiter and methods for its manufacture

摘要

A high temperature a.c. multicore superconductor comprises a silver-embedded bismuth cuprate superconductor material in a non-superconducting bismuth-strontium or strontium-calcium cuprate sheath (5). An a.c. multicore superconductor comprises a high Tc bismuth cuprate based superconductor material embedded in a silver-containing matrix material and surrounded by a higher resistivity sheath (5) of (a) a non-superconducting bismuth-strontium cuprate containing or consisting of Bi1.8-2.2Sr1.8-2.2Cu0.8-1.2Ox or (b) a non-superconducting strontium-calcium cuprate containing or consisting of (Sr alpha Ca1- alpha )CuyOz, where alpha = 0.1 to 0.9 and y = 0.3 to 3. An Independent claim is also included for production of the above a.c. superconductor.