Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

被引：0

作者：

Chudzik, M.P. ^{[1
]}

Polzin, B.J. ^{[1
]}

Thayer, R. ^{[1
]}

Picciolo, J.J. ^{[1
]}

Fisher, B.L. ^{[1
]}

Lanagan, M.T. ^{[1
]}

机构：

[1] Argonne Natl Lab, Argonne, United States

来源：

IEEE Transactions on Applied Superconductivity | 1997年 / 7卷 / 2 pt 2期

关键词：

Bars (metal) - Critical current density (superconductivity) - Differential thermal analysis - Hot pressing - Microstructure - Phase composition - Scanning electron microscopy - Sintering - Thermal conductivity of solids - X ray diffraction analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17.8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1.7/0.34)223 and (1.8/0.4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820 °C and 3 MPa. Critical current densities 1000 A/cm2 (critical currents of 750 A at 77 K in self-field conditions) were achieved.

引用

页码：2102 / 2105