THE DRAWING BEHAVIOR OF Y-BA-CU-O SOL FROM NONAQUEOUS SOLUTION BY A COMPLEXING PROCESS

A complexing process is developed to prepare Y-Ba-Cu-O superconducting fibers. The process is not identical to typical sol-gel processes; he re the resulting gel network is built up by hydrogen bonding linkage a mong complexing species in non-aqueous solution. Cu acetate, [Cu(OAC)( 2)], Ba methoxyethoxide [Ba(ORE)(2)] and Y acetate [Y(OAC)(3)] are use d as precursors for preparing homogeneous gels while cy-methacrylic ac id (HOAA(a)lpha) and diethylenetriamine (DETA) as complexing agents, a nd methoxyethanol (REOH) as solvent. Fibers drawn from a sol obtained through reduced pressure present no or little deformation at 80 degree s C via adjusting the amount of DETA and HOAA(a)lpha. Cu(OAC)(2), Ba(O RE)(2) and Y(OAC)(3) in the complexing process have been demonstrated to form gels without hydrolysis and condensation at ambient atmosphere . The relationships between the drawing behavior of sols and gel struc ture with different amounts of DETA and HOAA(a)lpha are suggested. The concentration region of drawing the gel fibers with no or little defo rmation heated at 80 degrees C is also found.