| 摘要 |
PURPOSE:To obtain a superconducting ceramic having further improved critical temperature and stable superconducting characteristics by decreasing the content of impurity alkali metal and/or halogen element existing in a V-based superconducting ceramic having a specific composition below a specific level. CONSTITUTION:The subject superconducting ceramic is expressed by the general formula (A1-xBx)yVzOw (x is 0-10; V is 1.0-3.0; z is 1.0-3.0; w is 2.0-10.0) and contains <=0.2wt.% of alkali metal such as Li, Na and K, <=0.2wt.% of halogen element and <=0.2wt.% of alkali metal and halogen atom in total. In the above formula, A is one or more elements selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ag, Cd, In, Sn, Hg, Tl, Pb and Bi and B is one or more elements selected from Be, Mg, Ca, Sr and Ba. |
