Physical properties of melt-cast annealed $Bi_{1.6}Pb_{0.4}Sr_2Ca_3Cu_4O_{12}$ compound

Özet

A $Bi_{1.6}Pb_{0.4}Sr_2Ca_3Cu_4O_{12}$ compound was produced by melt-casting method. The microstructure of the sample was studied by Scanning Electron Microscopy. Phase analysis was carried out by X-ray diffraction patterns and EDAX. The electrical resistance exhibites the existance of a superconducting phase with an onset temperature $T_c$ at 110 K along with a minor phase with an onset $T_c$ at 80 K. It has been found that the superconducting phase temperature $T_c$ increases with increasing sintering temperature.