| Title |
A Study on the Superconducting prperties of Bi system bulk |
| Keywords |
Au addition ; Bi system bulk ; metalic composite |
| Abstract |
The effects of Au addition on the structure and the superconducting properties of Bi system bulk have been investigated. Au exists in the metalic form in above materials. It does not affect the formation and structure of the BiSrCaCuO(2223) phase. The superconducting transition temperature Tc does not change for Bi_{1.7}Pb_{0.3}Sr_2Ca_2Cu_3O composite However Au doping can make the grains smaller. Metallic Au can make gathers on the grains boundary and lead to the increment of critical transport current density. The current density of Bi_{1.7}Pb_{0.3}Sr_2Ca_2Cu_3Au_{0.5}O was 1000A/cm^2 at liquid nitrogen temperature. |