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

被引：2

作者：

Chudzik, MP

Polzin, BJ

Thayer, R

Picciolo, JJ

Fisher, BL

Lanagan, MT

机构：

[1] Energy Technology Division, Argonne National Laboratory, Argonne

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621006

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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 wc:re 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 degrees C and 3 MPa. Critical current densities approximate to 1000 A/cm(2) (critical currents of 750 A at 77 K in self-field conditions) were achieved.

引用

页码：2102 / 2105

页数：4

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