| 摘要 |
PURPOSE:To improve critical current density by blending oxygencontaining compounds of Tl, Br, Pb, Ca, Sr and Cu and sintering to give a compound oxide having a specific composition. CONSTITUTION:Powders of oxides of Ca, Sr and Cu such as CaCO3SrCO3 and CuO are blended so at to give a fixed molar ratio and sintered to give a sintered material. The formed sintered material is ground, blended with powders of oxides of Tl, Bi and Pb such as Tl2O3, Bi2O, and PbO to give a superconducting material of oxide containing a compound oxide shown by formula (0.6<=p<=0.9, 0.1<=q<=0.4, 0.01<=r<=0.2, 7.0<=x<=11.0) and having high critical temperature and critical current density. |
