Abstract
The effect of binding additives on superconductivity is studied in Y-Ba-Cu-O ceramics. Mixtures of Y2O3, Ba(NO3)2 and CuO ( 1:2:3 ) are calcined, and sintered with the 10 mol% binding additives of the each component, respectively. The critical temperature and the zero field critical current density are measured. The values of Tc of the specimens are almost same but the values of Jc are sensitive to the kinds of binding additives. When sintered at 1193 K, Jc of the specimen with CuO additives is 218 A/cm2, and 7 A/cm2 is that of the specimen with Ba(NO3)2 additives. It has been confirmed that 10mol% CuO should be a proper additive for increasing the Jc value in the Y-Ba-Cu-O system.
