Solution spinning of a high- oxide superconductor: the effect of poly(vinyl alcohol) spinning medium on the critical current density of melt-processed superconducting filaments
The precursor filament was prepared by solution spinning through a homogeneous aqueous poly(vinyl alcohol) (PVA) solution of Y, Ba and Cu acetates. The solution spinning was successfully performed using PVA with degrees of polymerization (DP) of 1700 and 2450 and a degree of saponification of 85 mol%. The as-drawn filament was heated to remove volatile components and partially melted to generate a superconducting phase. The effects of the DP of PVA and a content of mixed acetates in the precursor filament on the critical current density of the melt-processed filament were examined. The higher was obtained for the filament spun from PVA solution of higher DP and lower acetate content. The highest value of at 77 K and 0 T was achieved for the filament spun from the DP 2450 PVA with an acetate to PVA ratio of two.
Document Type: Miscellaneous
Suzuka Junior College, 1250 Shonocho, Suzuka, Mie 513, Japan
Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Publication date: December 1, 1996