Study of Bi(2223) tapes with low thermal conductivity

被引：17

作者：

Putti, M

Cimberle, MR

Ferdeghini, C

Grasso, G

Manca, A

Goldacker, W

机构：

[1] Univ Genoa, Dipartimento Fis, CNR, INFM, I-16146 Genoa, Italy

[2] Forschungszentrum Karlsruhe, ITP, D-76021 Karlsruhe, Germany

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2001年 / 11卷 / 01期

关键词：

Ag alloys; Bi(2223)/Ag superconducting tapes; thermal conductivity measurements;

D O I：

10.1109/77.919764

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：

In this paper we describe an apparatus for static measurements of the thermal conductivity of Bi(2223)/Ag-sheathed tapes in a temperature range going from 4K to 200K, The standard experimental technique has been improved by the implementation of an original sample arrangement that minimizes the thermal losses by radiation. We have performed a set of measurements of thermal conductance on Bi(2223) tapes with different metallic sheaths. The thermal conductance varies within four order of magnitude when the sheath is changed from pure Ag to Ag alloys. The thermal conductivity of several AgAu and AuMg alloys has been extracted from these measurements, discussing then the origins and the mechanisms for the observed unpredicted material properties.

引用

页码：3285 / 3288

页数：4