Preparation of Y-Ba-Cu-O superconducting tape by pyrolysis of organic acid salts

A Y-Ba-Cu-O superconducting tape of 124 phase was successfully synthesized at atmospheric pressure by pyrolysis of organic acid salts. T/sub c(on)/=80 K and T/sub c(end)/=70 K were obtained along with a J/sub c/ of 2*10/sup 4/ A/cm/sup 2/ at 4.2 K and 0 T. An addition of calcium was found to elevate the T/sub c/ and improve the compactness of the film. The J/sub c/ of this sample is 3.2*10/sup 4/ A/cm/sup 2/ at 4.2 K and 0 T. The J/sub c/-B characteristic is better than that of the 124 phase without substitution.