METHOD FOR PRODUCING FLAT SUPERCONDUCTOR Russian patent published in 2003 - IPC

FIELD: electrical engineering; superconductors for electrical devices. SUBSTANCE: method for producing flat superconductors in the form of wide bands and sheets with different number of layers and cores in layer of high-temperature superconductor junctions includes following procedures: formation of hollow metal ampoule and its filling with powder of superconducting compound or half-finished product, reckoned finite space factor for single core being 20-75%; deformation of ampoule-and-powder assembly to thickness of 0.35-5 mm at extent of deformation within single pass being 1-20%; cutting of deformed ampoule-and-powder assembly into metered parts; formation of composite billet by placing desired quantity of metered components or metered components and reinforcing members in composite-billet shell in the form of hollow section of oval or rectangular cross-sectional area, reckoned finite space factor of multiple-core flat superconductor being 25-70%; deformation of composite billet to desired size at extent of deformation within single path being 1-18%; thermomechanical treatment including several heat treatment stages and deformations in-between at temperature and during time affording formation of superconducting phase of desired composition and structure in ceramic. Proposed method provides for increasing critical current of flat superconductor by 9.3 times due to enlarging surface area of ceramic-shell interface. EFFECT: enlarged functional capabilities due to enhancing width of short and long multiple-core bands. 23 cl