| 摘要 |
PURPOSE:To make possible to increase of superconductivity-transition temperature and reduction of containing amount of TO harmful for human body by forming an oxide superconductive material expressed by fixed chemical formula containing Tl, Bi, Pb, Sr, Ca, Cu and O. CONSTITUTION:The objective oxide superconductive material is expressed by chemical formula: (Tl1-X-YBiXPbY)1Sr2Ca3Cu4OZ (X=0.05-0.55, Y=0-0.55, X+Y<=0.65 and Z is arbitrary). Said superconductive material has superconductivity-transition temperature Tc=120K containing only a slight amount of Tl harmful for human body. |
