| Project/Area Number |
26630332
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Composite materials/Surface and interface engineering
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| Research Institution | Toyota Technological Institute |
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Principal Investigator |
Takeuchi Tsunehiro 豊田工業大学, 工学(系)研究科(研究院), 教授 (00293655)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 熱電材料 / ゼーベック係数 / エネルギー選択散乱効果 / ショットキー障壁 / 電気伝導度 / 出力因子 / 無次元性能指数 / 熱電変換 / 縮退半導体 / 電子散乱 / バンドギャップ / 電子構造 |
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| Outline of Final Research Achievements |
In this study, we investigated the energy selective scatterings of electrons at the grain boundary. By employing higher manganese silicide and making its grain size smaller than 1 micro-m, we observed an effective increase of Seebeck coefficient together with a small decrease in electrical conductivity. These behaviors are well accounted for with the energy selective scattering effect. We also confirmed that the performance of higher manganese silicide based thermoelectric materials was improved by 30 - 40 % due to the energy selective scattering effect, and succeeded in preparing high-performance thermoelectric materials consisting solely of cheap, non-toxic elements.
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