2021 Fiscal Year Annual Research Report
Improved cryogenic thermoelectric performance of MgAgSb-based materials by modulation doping of Cu
| Project/Area Number |
20K22486
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
苗 蕾 芝浦工業大学, 工学部, 教授 (60455540)
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Keywords | thermoelectric / α-MgAgSb / micro-pores effects / low thermal conductivity / Cu / cold energy / modulation doping / ZT |
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| Outline of Annual Research Achievements |
MgAgSb-based alloy was successfully prepared via ordinary planetary ball milling and spark plasma sintering. The element Cu successfully doped into MgAgSb to cooperatively optimize the electrical transport properties. The main parameters including nominal composition of raw powders Mg, Ag, Sb, Cu doping ratio, SPS pressure and heat treating conditions have been optimized. Due to the Cu successfully doped into Ag site, the maximum PF value of 2111 μW/mK-2 at 523K for MgAg0.93Cu0.02Sb0.98 was about 18% increased than 1788 μW/mK-2 for the initial sample MgAg0.95Sb0.98, a peak ZT ~ 1.08 at 473 K were achieved for the sample MgAg0.935Cu0.015Sb0.98. This work reveals that the TE performance of MgAgSb alloys can be enhanced via Cu doping, which could provide guidance for other materials.
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Research Products
(5 results)
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[Journal Article] Constructed Ge Quantum Dots and Sn Precipitate SiGeSn Hybrid Film with High Thermoelectric Performance at Low Temperature Region2022
Author(s)
Ying Peng, Lei Miao,* Chengyan Liu, Haili Song, Masashi Kurosawa, Osamu Nakatsuka, Song Yi Back, Jong Soo Rhyee, Masayuki Murata, Sakae Tanemura, Takahiro Baba, Tetsuya Baba, Takahiro Ishizaki, and Takao Mori
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Journal Title
Adv. Energy Mater.
Volume: 12
Pages: 2103191 (1-9)
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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