Preparation and Characterization of Hot-Pressed and Sintered BiPbSrCaCuO Superconductor

• 作者: Mohamed Mohamed Ibrahim Mostafa Mohamed Abd El-Raheem Nassar Mahmoud Megahid Sayed Mohammed Khalil
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 工学
• 关键词: Electrical RESISTIVITY SUPERCONDUCTORS Hot PRESSING SINTERING
• 年，卷（期）: 2012,（2）
• 页码范围: 75-84
• 页数: 10页
• 分类号: TB3

摘要

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.