Process for producing a strip-shaped, multi-core superconductor with high-Tc superconducting material and superconductor produced by this process

Process for producing a strip-shaped superconductor with multiple conductor cores that includes a superconducting material with a metal oxide high Tc phase and is at least partially surrounded by a normal conducting material, comprising:

• producing a fabricated conductor from powder precursor material of the superconducting material, at least partially surrounded by the normal conducting material,
• subjecting the fabricated conductor to a cross-section reducing and precursor-material compacting deformation process and an annealing treatment, where the deformation process includes at least one step for rolling flat a conductor blank from the fabricated conductor, and
• thermo-mechanically treating the fabricated conductor to produce a finished superconductor, wherein the treating comprises at least one rolling step with a gap between two rollers of which the rolling surfaces describe a concave, elliptical contour at least in their rolling regions, such that the finished superconductor is obtained with an elliptical cross-section.