STABLE SUPERCONDUCTIVE SUBSTANCE AND ITS PRODUCTION

摘要

Process for the treatment of superconductive ceramic materials, characterised in that the said materials are subjected to fluorination at a temperature lower than or equal to 120 DEG C. …The invention also relates to new superconductive materials characterised in that they contain fluorine atoms distributed according to a concentration gradient decreasing from the surface to the core of the said materials. …The materials according to the invention have stabilised and/or improved superconductive properties.