| 摘要 |
PURPOSE:To obtain a superconducting material showing superconductivity phenomena at extremely high temperature, by blending powder of each simple substance of Sn or Pb and B, Ca, Sr and Cu or powder of compounds containing one or more of each element so as to make desired atomic ratio of each element and sintering the blend once or more times. CONSTITUTION:Powder of each simple substance of Sn or Pb and B, Ca, Sr and Cu or powder of compounds containing one or more of each element is blended so as to satisfy the atomic ratio shown by the formula. Simple substances of each element and oxides, carbonates, etc. containing one or more elements of the group of the elements can be advantageously used as the above- mentioned raw material powder. Then the prepared above-mentioned powder mixture is sintered at 800-900 deg.C at least once to give the aimed superconducting material. The superconducting material becomes a superconductor at an extremely higher critical temperature than a conventional superconducting material. The above-mentioned superconducting material maintains characteristics for a long period of time. |
