THERMAL-CONDUCTIVITY OF AG-DOPED BI-2212 SUPERCONDUCTING MATERIALS PREPARED BY THE FLOATING-ZONE METHOD

被引：7

作者：

MATSUKAWA, M ^{[1
]}

TATEZAKI, F ^{[1
]}

NOTO, K ^{[1
]}

FUJISHIRO, H ^{[1
]}

MICHISHITA, K ^{[1
]}

KUBO, Y ^{[1
]}

机构：

[1] JAPAN FINE CERAM CTR,NAGOYA 456,JAPAN

来源：

CRYOGENICS | 1994年 / 34卷 / 08期

关键词：

BI-SR-CA-CU-O; SILVER DOPING; THERMAL CONDUCTIVITY; PERCOLATION;

D O I：

10.1016/0011-2275(94)90148-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermal conductivity kappa of Ag-doped Bi-2212 superconducting materials prepared by the floating zone method has been measured between 15 and 200 K. Ag-doping into the superconducting matrix yields a large enhancement of kappa over a wide range of measured temperatures, and the thermal conductivity of a 15 wt% silver-doped sample in the low temperature region becomes about one order of magnitude larger than that of an undoped sample. This behaviour is discussed in terms of the percolation theory. From the viewpoint of cryogenic engineering, it is found that the Ag grains operate as 'intrinsic stabilizers' in the Bi-2212 superconducting materials.

引用

页码：685 / 688

页数：4

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