Superconducting thick-films from a Y-Ba-Cu-O precursor

We have prepared scree-printed films of the Y-Ba-Cu-O composuperconductiund starting from a spray-pyrolysis precursor powder. BeO ceramic substrates are confirmed to be inert with respect to the film up to about 100 C. Electrical properties of oxigen annealed films are investigated,evidencing excellent superconducting behaviour,both in terms of Tc (=91K) and Jc (>100 Asquarecm at 77K)