| 研究課題/領域番号 |
22KF0336
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| 補助金の研究課題番号 |
22F22756 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分28030:ナノ材料科学関連
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| 研究機関 | 芝浦工業大学 |
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研究代表者 |
Mele Paolo 芝浦工業大学, 工学部, 教授 (70608504)
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| 研究分担者 |
LATRONICO GIOVANNA 芝浦工業大学, SIT総合研究所, 外国人特別研究員
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| 研究期間 (年度) |
2023-03-08 – 2025-03-31
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| 研究課題ステータス |
中途終了 (2023年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2024年度: 600千円 (直接経費: 600千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 600千円 (直接経費: 600千円)
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| キーワード | Skutterudites / Doping / Filler / SPS / Quenching / thermoelectrics / thin films / doping / filler / quenching |
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| 研究開始時の研究の概要 |
AY2022:synthesis of double-filled bulk skutterudites and optimisation of the densification parameters with SPS.
AY2023:test of multifilled bulk skutterudites and thermoelectric characterizations; PLD thin film deposition on silica substrates. Fabrication of thin film modules from the best compositions.
AY2024:investigation of the addition of nanoparticles for both bulk and thin films
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| 研究実績の概要 |
Three samples of skutterudite doped with Sn: Smy(FexNi1-x)4Sb11.5Sn0.5 were prepared with X= 0.45 (n-type semiconductor); X = 0.55 (n-p crossover semiconductor); X = 0.65 (p-type semiconductor). After grinding, sieving, and densification with SPS (500 ℃ for 7 minutes) the samples were sent to a collaborator at NIMS Tsukuba for the transport and thermoelectric characterization. Best samples presented an absolute value of Seebeck coefficient of 100 microV/K, a room temperature thermal conductivity of
1 W/m K, an electrical conductivity of 1000 S/cm and a max power factor of 1700 microW/m K^2 at 550K. These results will be summarized and submitted to an international peer-reviewed journal at the earliest convenience.
The double filled skutterudites of composition (Sm,Nd)y(FexNi1-x)4Sb12 and (Sm,La)y(FexNi1-x)4Sb12 were prepared in collaboration with the research group at University of Genoa and will be subjected to structural investigation by XRD before the densification and thermoelectric characterization. The addition of carbon-based nanodefects to Smy(FexNi1-x)4Sb12 skutterudites in the attempt of reducing the thermal conductivity was accomplished and a series of samples with increasing content of carbon was sent to collaborators at TTI (Nagoya) for SPS densification and thermoelectric characterization.
The fellow visited Dillard University (New Orleans, USA) for 1 month to prepare skutterudite thin films added with carbon nanoparticles
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
The synthesis of carbon-added Smy(FexNi1-x)4Sb12 bulk skutterudites was unexpectedly difficult due to the high reactivity of nanocarbon particles.
The custom made apparatus to measure the power factor in the laboratory is not working properly, so samples have to be sent to collaborators.
At Dillard University due to time constraints it was just possible to calibrate the multi-target, multi-laser PLD system.
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| 今後の研究の推進方策 |
Future work will be focused to prepare the films of Smy(FexNi1-x)4Sb11.5Sn0.5 and of double-filled skutterudites using the SPS targets. In addition, bulk and thin-film modules of selected n- type and p-type skutterudites will be fabricated and their output power will be evaluated. The preparation of nanocomposite carbon-skutterudite thin films in collaboration with Dillard University will continue.
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