| Project/Area Number |
21760571
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
MIKAMI Masashi National Institute of Advanced Industrial Science and Technology, サステナブルマテリアル研究部門, 研究員 (10415747)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 熱電変換材料 / 酸化チタン / 酸窒化物 / マグネリ相 / 熱電特性 / セラミックス / 窒化 / チタン / ゼーベック係数 / 導電率 / 熱伝導率 |
|---|
| Research Abstract |
The partially nitrogen-substituted titanium oxide was synthesized by a solid state reaction of TiO_2 and TiN. It was confirmed that the single phase of each magneli structure, Ti_nO_<2n-1> (n=9~5), can be obtained by the adjustment of mixing ratio in raw powders. In the magneli titanium oxynitride, electrical conductivity was significantly improved compared to TiO_2 while Seebeck coefficient was decreased. In addition, the periodical defect in the crystal structure of magneli phase induces phonon scattering, resulting in the reduction of thermal conductivity. From these effects, the oxynitride titanium exhibits the much higher thermoelectric performance compared to TiO_2.
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