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_c(on)=80 K and T_c(end)=70 K were obtained along with a J_c of 2×10⁴ A/cm² at 4.2 K and 0 T. An addition of calcium was found to elevate the T_c and improve the compactness of the film. The J_c of this sample is 3.2×10 ⁴ A/cm² at 4.2 K and 0 T. The J_c -B characteristic is better than that of the 124 phase without substitution