INDUCED CRITICAL-CURRENT DENSITY LIMIT OF AG SHEATHED BI-2223 TAPE CONDUCTOR

被引：0

作者：

OGIWARA, H ^{[1
]}

SATOU, M ^{[1
]}

YAMADA, Y ^{[1
]}

KITAMURA, T ^{[1
]}

HASEGAWA, T ^{[1
]}

机构：

[1] SHOWA ELECT WIRE & CABLE CO LTD,KAWASAKI KU,KAWASAKI 210,JAPAN

来源：

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

关键词：

Bismuth compounds - Crystal structure - Crystals - Electric coils - Electric conductivity - Induced currents - Interfaces (materials) - Magnetic fields - Silver - Superconducting materials - Tapes;

D O I：

10.1109/20.305760

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：

We have already reported the best critical current density of 66,000 A/cm2 with an Ag sheathed Bi-2223 tape conductor. The Brick-wall model is for explaining the current transport mechanism of this conductor. The model has its roots in the fact that the Bi-2223 tape com is a complicated stack of crystals which have a mica-flake structure. The orientation of the crystals seriously affects the current transport capability. Moreover, the contacts between the stacking crystals are very important. The transport current flows dividing into many branch paths. Under high magnetic field, the different paths experienced different electromagnetic forces. Differences between the electromagnetic forces on the different crystals can affect the contacts so as to increase resistivity and decrease overall critical current density of the tape. This effect can foretell the limit of the critical current density obtainable with these kind of conductors.

引用

页码：2399 / 2401

页数：3

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