Method of preparing rare earth-barium-cuprates superconductors

摘要

Method of preparing a rare earth-barium-cuprate superconductor in form of a thick film on metallic tapes metallic wires, or as powder in a tube comprising steps of supporting on a metallic substrate a mixture of seed crystals of rare earth-barium-cuprate with a high melting point and rare earth-barium-cuprate powder with a lower melting point;subjecting the supported material on the substrate to heat treatment at a temperature below the melting point of the high melting rare earth-barium-cuprate seed crystals and the metallic substrate and above the melting point of the low melting powder; andcooling the heat treated supported material below the melting temperature of the material.