LOW THERMAL CONDUCTIVE BI-2223 TAPES SHEATHED WITH AG-AU ALLOYS

被引：39

作者：

FUJISHIRO, H ^{[1
]}

IKEBE, M ^{[1
]}

NOTO, K ^{[1
]}

MATSUKAWA, M ^{[1
]}

SASAOKA, T ^{[1
]}

NOMURA, K ^{[1
]}

SATO, J ^{[1
]}

KUMA, S ^{[1
]}

机构：

[1] HITACHI CABLE LTD,ADV RES CTR,TSUCHIURA 300,JAPAN

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1994年 / 30卷 / 04期

关键词：

D O I：

10.1109/20.305574

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：

With the view of applying to power current leads for superconducting magnet systems and for other cryogenic power handling systems, low thermal conductive Bi-2223 superconducting tapes sheathed with Ag-Au alloy were fabricated and their thermal conductivities were measured from 12 to 260K. The critical current density (overall-J(c)) was about 1700A/cm2 at 77K, 0T and remained nearly constant irrespective of Au concentration up to 11 at.%. The tape sheathed with Ag + 11 at.% Au alloy, of which the superconductor cross-section ratio f(sc) was 0.65, had a thermal conductivity value about 0.2W/cmK at 77K. This value is as low as that of Cu-Zn. It was found that the thermal conductivity of the tape was close to the calculated one based on f(sc) and the independently measured thermal conductivities, of the Ag-Au alloy and the Bi-2223 superconductor.The superconducting tapes sheathed with the alloy were confirmed to be suitable for the application as power current leads.

引用

页码：1645 / 1650

页数：6

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