抄録
The effect of cold isostatic pressing in the forming process on superconductivity is studied in Y-Ba-Cu-O system ceramics. Y2O3, Ba(NO3)2 and CuO are mixed to the ratio of Y:Ba:Cu=1:2:3, calcined at 1173 K, mixed with and without the various amount of CuO as a binding additive, formed with cold isostatic press at various pressure and sintered at 1173 K. The critical temperature and the zero field critical current density at 77 K are measured. The values of Tc are almost same in all kinds of the specimens but the values of Jc are sensitive to the amount of a binding additive and the cold isostatic forming pressure.
