MANUFACTURE OF SUPERCONDUCTOR DEVICE

• Main Authors: NIBU HIROMI, YOSHINO HISASHI, FUKUSHIMA SHIN
• Format: Patent
• Language: English
• Published: 16.11.1988
• Subjects: ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CABLES; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONCRETE; CONDUCTORS; ELECTRICITY; INORGANIC CHEMISTRY; INSULATORS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SLAG; TREATMENT OF NATURAL STONE

PURPOSE:To unify the thickness and composition of a film and prevent the peeling of the film due to the cooling and heating cycle by coating and baking the solution containing the metal salt of each element constituting a perovskite type oxide superconductor at the preset ratio to form the film. CONSTITUTION:An aqueous solution or an organic solution containing the metal salt of each element constituting an oxide superconductor at the preset ratio is coated on a substrate, this paint film is heated to heat-decompose the metal salt of each element, it is then heat-treated at the temperature of 700 deg.C-1000 deg.C in the oxygen containing atmosphere to form the oxide superconductor film. The standard composition of the ratio of each element is Y 1mol, Ba 2mol, Cu 3mol for the Y-Ba-Cu-O system, for example. A film with uniform thickness and composition can be thereby formed, the stress on the connection interface between the substrate and the film due to the cooling and heating cycle is reduced, the occurrence of the peeling or cracks is prevented, and the good characteristic can be maintained for a long time.