Verfahren zur Züchtung von Einkristallen von Hochtemperatursupraleitern aus Seltenerd-Kupraten der Form SE¶1¶¶+¶¶x¶Ba¶2¶¶-¶¶x¶Cu¶3¶0¶7¶¶-¶¶delta¶ und nach dem Verfahren hergestellte Kristalle

摘要

The invention relates to a method for growing monocrystals of high-temperature supraconductors made of rare earth-cuprates of SE1+xBa2-xCu3O7- delta . Two basic methods, i.e. crystallization and melt processing, enable crystals or quasi- monocrystals to be obtained with technico-physical characteristics that substantially improve upon known Y123 data, wherein transition temperature (Tc), current density (j) and field (B) are fundamentally present. This is achieved though an initial powder mixture that is low in rare earth, by crystallization or melt processing using a variable partial oxygen pressure (P02) and an oxidation process with targeted reduction of oxygen. The invention also describes the superiority of Nd123 over Y123, the latter being hitherto known and researched by specialists.