DE3838670

• Main Authors: SCHMITZ, GEORG, WOLTERS, CHRISTIAN, 5100 AACHEN, DE, WEISS, HARTMUT
• Format: Patent
• Language: English
• Published: 28.06.1990
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRICITY; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

Process for producing high-temperature superconductors containing components from the group comprising the rare earth metals (RE) and also barium and copper which are embedded in the form of the oxidic compound (RE)1Ba2Cu3O7-x in a matrix consisting of at least one metal with low oxygen affinity. In this formula, "x" is less than or equal to 0.5. To solve the problem of achieving a good ductility of the material for further processing accompanied by high current carrying capacity, the following process measures are adopted: a) a mixture which contains the compounds composed of the above components and the metal forming the matrix or an oxide which can be reduced to said metal as finely and homogeneously dispersed as possible is compressed to form a blank with as high a density as possible and said blank is heated to a temperature at which a solid-state reaction to form the said oxidic compound proceeds and it is then heated, for the purpose of forming a moulded body, at least locally to a temperature above the melting point of the oxidic compound and a directed solidification is carried out, and b) the moulded body is heated in an oxygen-containing atmosphere to a temperature of at least 300 DEG C and the temperature treatment is continued until "x" is as small as possible, but not more than 0.5.