PREPARATION OF LONG Y123 SUPERCONDUCTING FILAMENT BY SOLUTION SPINNING

The preparation of a long superconducting Y123 filaments is developed by using solution spinning for the precursor of the oxide. Long precur sor filaments are prepared by dry spinning with a starting homogeneous aqueous PVA solution containing Y, Ba and Cu acetates. The as-drawn f ilament with 250 mu m in diameter and 300 mm in length is pyrolyzed an d partial-melted by using a tube furnace with a constant heating zone of 500 mm. A superconducting filament of 60 mu m in diameter and 200 m m in length with high J(c) of more than 10(4) A/cm(2) at 77 K and 0 T is obtained by controlling the partial melting.