Thermal conductivity of Ag-doped Bi-2212 superconducting materials prepared by the floating zone method
✍ Scribed by M. Matsukawa; F. Tatezaki; K. Noto; H. Fujishiro; K. Michishita; Y. Kubo
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 415 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
The thermal conductivity x 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 K 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.