Enhancement of thermoelectric efficiency in type-VIII clathrate Ba8Ga16Sn30 by Al substitution for Ga
Journal of Applied Physics 108 巻 7 号
073705-1-073705-4 頁
2010-10-07 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Enhancement of thermoelectric efficiency in type-VIII clathrate Ba8Ga16Sn30 by Al substitution for Ga
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| 作成者 |
Deng Shukang
Saiga Yuta
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| 収録物名 |
Journal of Applied Physics
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| 巻 | 108 |
| 号 | 7 |
| 開始ページ | 073705-1 |
| 終了ページ | 073705-4 |
| 抄録 |
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.
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| NDC分類 |
物理学 [ 420 ]
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
The American Institute of Physics
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| 発行日 | 2010-10-07 |
| 権利情報 |
Copyright (c) 2010 American Institute of Physics
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0021-8979
[DOI] 10.1063/1.3490776
[NCID] AA00693547
[DOI] http://dx.doi.org/10.1063/1.3490776
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