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ID 30785
本文ファイル
著者
Deng, Shukang
Saiga, Yuta
NDC
物理学
抄録(英)
Single-crystalline samples of type-VIII clathrate Ba8Ga16-xAlxSn30 (0 <= x <= 12) were grown from Sn flux to characterize the structural and thermoelectric properties from 300 to 600 K. The lattice parameter increases by 0.5% as x is increased to 10.5 whose value is the solubility limit of Al. The Seebeck coefficients of all samples are largely negative and the absolute values increase to approximately 300 mu V/K on heating to 600 K. This large thermopower coexists with the metallic behavior in the electrical resistivity. The values of resistivity for 1 <= x <= 6 at 300 K are in the range 3.3-3.8 m Omega cm which is 70% of that for x=0. As a result, the power factor for x=4 and 6 has a rather large maximum of 1.83 x 10(-3) W/m K-2 at 480 K. The thermal conductivity stays at a low level of 0.72 W/mK up to 480 K, and the sample with x=6 reaches a ZT value of 1.2 at 500 K.
掲載誌名
Journal of Applied Physics
108巻
7号
開始ページ
073705-1
終了ページ
073705-4
出版年月日
2010-10-07
出版者
The American Institute of Physics
ISSN
0021-8979
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2010 American Institute of Physics
関連情報URL
部局名
先端物質科学研究科