2018 Fiscal Year Final Research Report
Development of oxide thermoelectric conversion module composed of pn element of single matrix phase or same crystal structure
| Project/Area Number |
15K06479
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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 |
Structural/Functional materials
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| Research Institution | Yokohama National University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
齋藤 美和 神奈川大学, 工学部, 助教 (60594215)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Keywords | 熱電特性 / 熱電変換材料 / 熱電変換モジュール / p型素子 / n型素子 / 無次元性能指数 / ペロフスカイト酸化物 / スピン状態 |
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| Outline of Final Research Achievements |
At present, oxide-based thermoelectric materials are attracting attention as environmentally friendly materials that are composed of elements rich in resources and low toxicity, and are relatively stable even under high temperature and oxidizing environments. However, for oxide-based thermoelectric materials, showing the same matrix phase or the same crystal structure and high performance have not been found yet. Therefore, this research clarified , in particular, the thermoelectric characteristic of polycrystalline samples Pr1-xSrxMnO3 (0.1≦x≦0.7), La1-xSrxFeO3 (0.1≦x≦0.3), Pr0.9Sr0.1(Mn1-xFex)O3 (0≦x≦1), Pr1-xSrxFeO3 (0.1≦x≦0.7), and Pr1-xCaxFeO3 (0.1≦x≦0.9), and verified the possibility of the application to a thermoelectric conversion element.
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| Free Research Field |
金属材料物性
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、Fe3+のスピン状態を制御し中間スピンFe3+が多数を占めるペロブスカイトFe酸化物に着目し、多結晶試料を作製して、そのp型或いはn型熱電特性を明らかにすることが重要であるという知見を得た。この研究によって、p型及びn型の高い性能を示すペロブスカイトFe酸化物が発見されれば、高温・酸化環境下での熱電発電のエネルギー変換効率向上に貢献するだけでなく、喫緊の課題である持続可能社会の促進をもたらす材料の実用化に新しい展開が期待される。
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