Effects of lithium additions on processing of Bi-Sr-Ca-Cu-O superconducting tapes

摘要

Lithium additions to the high-temperature superconductor Bi(sub 2)Sr(sub 2)CaCu(sub 2)O(sub x) (2212) increased superconducting transition temperatures and improved resistance to effects of magnetic fields. In addition, these additions lowered the melting point of 2212 and increased reaction kinetics. Ag-clad tapes fabricated from 2212 with and without Li exhibited profound differences. For heating to temperatures less than or equal to 840(degrees)C, grain growth and sintering were much more substantial in the tapes containing Li.