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- Michitaka Ohtaki
- Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816, Japan
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- Toshiki Tsubota
- Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816, Japan
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- Koichi Eguchi
- Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816, Japan
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- Hiromichi Arai
- Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816, Japan
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抄録
<jats:p>A mixed oxide (Zn1−xAlx)O exhibits promising thermoelectric properties attaining a dimensionless figure of merit ZT of 0.30 at 1000 °C, which value is much superior to other oxides and quite comparable to conventional state-of-the-art thermoelectric materials. The addition of a small amount of Al2O3 to ZnO results in a large power factor of 10–15×10−4 W/mK2, showing a marked increase in the electrical conductivity while retaining moderate thermoelectric power. A large product of the carrier mobility and density of states would be responsible for the favorable electrical properties of the present oxide. A figure of merit Z=0.24×10−3 K−1 is attained by (Zn0.98Al0.02)O at 1000 °C, even with a high thermal conductivity. A predominant proportion of the phonon thermal conductivity promises a further improvement in the thermoelectric performance by selective enhancement of phonon scattering.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 79 (3), 1816-1818, 1996-02-01
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1361137045194129280
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- NII論文ID
- 80008776372
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- NII書誌ID
- AA00693547
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- DOI
- 10.1063/1.360976
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- ISSN
- 10897550
- 00218979
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