| 摘要 |
<p>A superconductor essentisally comprises a three-component metallic oxide including yttrium, barium, and copper (Y-Ba-Cu three-component metallic oxide) and an oxide of an element having a melting point lower than that of the three-component metallic oxide and having 0.1 to 5.0 wt% in form of the oxide thereof. The element is preferably of bismuth, antimony, boron, lead, and praseodymium.</p> |
