A study is presented on a series of Y-Ba-Cu-O superconductors prepared
with the Oxalate Precipitation/Evaporation method. The effect of the
preparation conditions on the properties of these superconductors has
been studied with X-rays, scanning electron microscopy, Raman
spectroscopy, and magnetic measurements. The experiments show that good
quality superconductors can be fabricated with this preparation
procedure and also indicate that the properties of these materials are
very sensitive to the preparation conditions