| Project/Area Number |
25410238
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic industrial materials
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| Research Institution | University of Yamanashi |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
IRIE Hiroshi 山梨大学, 総合研究部, 教授 (70334349)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 熱電酸化物材料 / Ba2NaNb5O10-δ / 熱電特性 / 無次元性能指数 / ハーマン法 / 熱伝導率 / 酸化物熱電材料 / Nb oxide / Ba2NaNb5O15 / スモールポーラロン / フェルミ積分法 / ゼーベック係数 / 導電率 / バンド計算 / Sr3Fe2O7 |
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| Outline of Final Research Achievements |
Reduced tungsten bronze-type oxide Ba2NaNb5O15 (BNN) oriented ceramics was prepared to investigate thermoelectric (TE) properties. In order to discuss enlarged effective mass, mobility, scattering parameter (r), and carrier density of BNN were estimated by using transport and Hall measurements. In TE properties, BNN showed high absolute Seebeck coefficient (|S|) up to 250 μV/K and electrical conductivity (σ) of 17.1 S/cm, and power factor above 0.12 mW/mK2. Dimension less figure of merit (ZT) and thermal conductivity (k) were evaluated to be 0.1 and 0.5 W/mK, respectively, by using Harman method from room temperature to 200℃.
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