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A platform for research: civil engineering, architecture and urbanism
MULTILAYER STRUCTURE FOR HIGH-TEMPERATURE SUPERCONDUCTOR-COATED CONDUCTORS AND METHOD FOR PREPARING THICK FILMS
The present disclosure discloses a multilayer structure for high-temperature superconductor-coated conductors and a method for preparing superconducting thick films by a chemical solution method. The structure is: YBCO/Y(RE)BCO/manganese copper oxide/magnesium oxide/yttrium oxide/aluminum oxide/Hastelloy tape. This method adjusts the stoichiometric ratio and directional growth conditions by adding RE (rare earth elements such as Dy, Gd and the like) to the first chemically prepared superconducting layer, and provides more possibilities for the magnetic flux pinning of superconducting layers. In the chemical preparation of the second layer, polyethyleneimine (PEI) is added to the precursor, wherein Cu2+ and PEI undergo a complex reaction, which on one hand, reduces the volatilization of Cu2+ in the low-temperature pyrolysis stage, and on the other hand, effectively inhibits the segregation of Cu2+, and meanwhile, improves the phenomenon that the surface of the thick film is easy to crack. Multiple coatings are carried out by dip coating, and low-temperature treatment and medium-temperature treatment are performed. By carrying out low-temperature pyrolysis in steps and high-temperature sintering in one step, a multilayer ReBCO thick film without cracks on the surface and with a biaxial texture and excellent grain orientation can be prepared. Its critical current density can still reach 1.4 MA/cm2 (77K, OT), and the superconducting current-carrying capacity Ic in the liquid nitrogen temperature zone reaches 140 A/cm. (Figure 1) - Page 1/4 2 nd HTS Layer: PEI-assisted YBaCuO 14 HTS Layer: Y(RE)BaCuO Oxide buffers: LaMnO/MgO/Y2O,/Al2O Substrate: Hastelloy Tape
MULTILAYER STRUCTURE FOR HIGH-TEMPERATURE SUPERCONDUCTOR-COATED CONDUCTORS AND METHOD FOR PREPARING THICK FILMS
The present disclosure discloses a multilayer structure for high-temperature superconductor-coated conductors and a method for preparing superconducting thick films by a chemical solution method. The structure is: YBCO/Y(RE)BCO/manganese copper oxide/magnesium oxide/yttrium oxide/aluminum oxide/Hastelloy tape. This method adjusts the stoichiometric ratio and directional growth conditions by adding RE (rare earth elements such as Dy, Gd and the like) to the first chemically prepared superconducting layer, and provides more possibilities for the magnetic flux pinning of superconducting layers. In the chemical preparation of the second layer, polyethyleneimine (PEI) is added to the precursor, wherein Cu2+ and PEI undergo a complex reaction, which on one hand, reduces the volatilization of Cu2+ in the low-temperature pyrolysis stage, and on the other hand, effectively inhibits the segregation of Cu2+, and meanwhile, improves the phenomenon that the surface of the thick film is easy to crack. Multiple coatings are carried out by dip coating, and low-temperature treatment and medium-temperature treatment are performed. By carrying out low-temperature pyrolysis in steps and high-temperature sintering in one step, a multilayer ReBCO thick film without cracks on the surface and with a biaxial texture and excellent grain orientation can be prepared. Its critical current density can still reach 1.4 MA/cm2 (77K, OT), and the superconducting current-carrying capacity Ic in the liquid nitrogen temperature zone reaches 140 A/cm. (Figure 1) - Page 1/4 2 nd HTS Layer: PEI-assisted YBaCuO 14 HTS Layer: Y(RE)BaCuO Oxide buffers: LaMnO/MgO/Y2O,/Al2O Substrate: Hastelloy Tape
MULTILAYER STRUCTURE FOR HIGH-TEMPERATURE SUPERCONDUCTOR-COATED CONDUCTORS AND METHOD FOR PREPARING THICK FILMS
CAI CHUANBING (author) / LI MINJUAN (author) / BAI YUELING (author) / FANG JIANHUI (author) / LIU ZHIYONG (author)
2021-07-22
Patent
Electronic Resource
English
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