Method for producing a superconductor, in strip form, having a high-Tc superconductor material

A production method, which comprises:

• producing a conductor initial product having a plurality of conductor cores formed of a powdery initial material being a superconductor material and surrounded by a normally conductive material;
• subjecting the conductor initial product to a first flattening step such that a percentage reduction in a thickness of a cross section of at least one conductor core is between 3 and 10% and powder fluidity is maintained in the at least one conductor core;
• subsequently subjecting the conductor initial product to a second flattening step carried out such that the percentage reduction in the thickness of the cross section of the at least one conductor core is at least 5% greater than that from the first flattening step;
• and
• annealing the conductor initial product resulting in an elongated superconductor having the plurality of conductor cores composed of the superconductor material with a metal-oxide high-Tc phase and being in a strip form.