Ag-sheathed Bi(Pb)SrCaCuO superconducting tapes
作者： SX Dou , HK Liu , None
DOI: 10.1088/0953-2048/6/5/001
关键词:
摘要: The processing and properties of Ag-sheathed Bi-based superconducting tapes prepared using the powder-in-tube technique have been reviewed. Powder heat treatment, among various other factors, were found to be critical Jc Ag/Bi-based wires. Reactive, homogeneous, carbonate-free incompletely reacted powders, produced by solution route are desirable. Liquid phase sintering, which is essential achieve intimate grain connectivity high alignment, can achieved a short period melt or annealing at temperatures near melting point composites. An Ag sheath has proved sufficient for achieving flexibility stability these tapes. interfacial layer between oxides shows an improved strength flexibility. thermally activated flux creep determines temperature. Weak links largely eliminated in high-quality but weak-link behaviour becomes pronounced low temperatures. dispersed 2212 defects Ag/2223 may act as potential pinning sites. Multiprobe measurements show no accumulative boundary resistance long Fabrication better reproducibility than that
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