Flux Pinning Of Bi2sr2cacu2o 8 Delta High Tc Superconducting Tapes Utilizing Sr Ca 14cu24o 41 Delta And Sr2caal2o6 Defects
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Flux Pinning Of Bi2sr2cacu2o 8 Delta High Tc Superconducting Tapes Utilizing Sr Ca 14cu24o 41 Delta And Sr2caal2o6 Defects
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Author :
language : en
Publisher:
Release Date : 2003
Flux Pinning Of Bi2sr2cacu2o 8 Delta High Tc Superconducting Tapes Utilizing Sr Ca 14cu24o 41 Delta And Sr2caal2o6 Defects written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Efforts to improve the magnetic flux-pinning properties of Bi2Sr2CaCu2O(8+delta)/Ag (2212/Ag) tape conductors utilizing (Sr(1-x)Ca(x)14Cu24O(41+delta) and Sr2CaAl2O6 defects are described. Precursor powders with composition(2212 + N% volume fraction Sr10Ca4Cu24O(41+delta); N = 0, 7, 15) were prepared by solid-state reaction to obtain subsolidus phase equilibrium at 860 deg C, as measured by X-ray diffraction (XRD). Nanophase (10 - 20 nm)Al2O3 was added (1.1% mass fraction) to N = 0 and 15 fully reacted powders. Brush-on coated tapes (13 - 17 micrometers 2212 thickness) were processed by a partial-melt growth method in air with variable melting from 865 deg C to 890 deg C, and slow-cool recrystallization from 856 deg C to 847 deg C. The effect of different melt temperatures and compositions on film properties (phase assemblages, orientations, and compositions, and defect sizes) was studied by XRD, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS).