TITLE:
Preparation and Characterization of Hot-Pressed and Sintered BiPbSrCaCuO Superconductor
AUTHORS:
Mohamed Mohamed Ibrahim, Nassar Mahmoud Megahid, Mostafa Mohamed Abd El-Raheem, Sayed Mohammed Khalil
KEYWORDS:
Electrical Resistivity; Superconductors; Hot Pressing; Sintering
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.2 No.2,
April
23,
2012
ABSTRACT: Powder compacts of the system Bi2–xPbxSr2Ca2Cu3Oy with 0 ≤ x ≤ 0.5 molar ratio using both techniques; isothermal hot pressing and the solid state reaction (sintering). The XRD of the hot pressed powder compacts of the nominal compositions Bi2–xPbxSr2Ca2Cu3Oy showed 2212 and 2223 phases. The resistivity temperature variations belonging to the composition Bi1.8Pb0.2Sr2Ca2Cu3Oy showed metal-superconducting transition at Tons = 143 K for the annealed sample for 24 h. The annealed nominal composition Bi1.5Pb0.5Sr2Ca2Cu3Oy for 18 h showed metal to superconducting transition at 80 K.