| 摘要 |
PURPOSE:To drop a calcination temperature and to improve calcination density and critical current density without leading to reduction in critical temperature in a superconducting porcelain composition of Y-Ba-Cu-O base, by partially replacing part of copper with a specific amount of lead. CONSTITUTION:This superconducting porcelain composition has a composition shown by the formula (R is rare earth element including Y or Sc; 6<=y<=0; 0.02<x<2.8). The superconducting porcelain composition is obtained by blending raw materials such as BaO, Y2O3, CuO and PbO in a given ratio, calcining, molding and burning. Since copper of the superconducting porcelain composition is partially replaced with a specific amount of lead, the composition can be burnt at a relatively low temperature and yet calcination temperature and critical current density can be improved. |
