Superconducting materials.

摘要

This invention is directed to a method for making superconducting copper oxide based materials which have a phase having a transition temperature above 200 K. The method comprises subjecting a superconducting copper oxide based material precursor to an oxygenation in an atmosphere comprising more than 20% oxygen by volume at a temperature less than 200 DEG C for a time sufficient to form the superconducting material. The invention also is directed to maintaining the superconducting properties of a copper oxide based superconducting material having a transition temperature above 150 K.