Ⅰ. INTRODUCTIONObtaining new kinds of high-T_c superconductors from Bi-Sr-Ca-Cu-O system has been an important objective of much research because of their containing no rare and noble metal. Superconductivity at 108 ...Ⅰ. INTRODUCTIONObtaining new kinds of high-T_c superconductors from Bi-Sr-Ca-Cu-O system has been an important objective of much research because of their containing no rare and noble metal. Superconductivity at 108 K can be obtained easily as 0.35 mol Pb (in nominal composition) is used to replace part of Bi in the system. Superconductivity at 118 K can be ob-展开更多
文摘Ⅰ. INTRODUCTIONObtaining new kinds of high-T_c superconductors from Bi-Sr-Ca-Cu-O system has been an important objective of much research because of their containing no rare and noble metal. Superconductivity at 108 K can be obtained easily as 0.35 mol Pb (in nominal composition) is used to replace part of Bi in the system. Superconductivity at 118 K can be ob-
