Superconductive element and relative preparation process

Process for preparing a superconductive element comprising a rigid support made from non-superconductive material, said support comprising at least one superconductive track formed from a groove containing a superconductive material having a real density equal to at least 85% of the value of its theoretical density, comprising the following operative steps:

• a) making at least one groove on the surface of a rigid support made from non-superconductive material;
• b) inserting a material which consists of a powdered precursor of a superconductive material inside the groove and compacting said powdered precursor up to a real density value equal to at least 50% of the theoretical density value;
• c) positioning at least one solid reactant above the groove in contact with said powdered precursor of a superconductive material or in a position adjacent to the groove in which the powdered precursor of a superconductive material is contained, said solid reactant being a compound that, once it has been brought to the liquid state, is capable of reacting with said powdered precursor of a superconductive material to form a superconductive material;
• and
• d) subjecting the reactant and the groove containing the precursor to heating until the reactant is liquefied and subsequently infiltrates inside the precursor powder of a superconductive material with formation of a superconductive track inside the groove.