2013 Fiscal Year Final Research Report
Improvement of environment-friendly thermoelectric materials based on lattice defects control of ordered structures
| Project/Area Number |
23246120
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KIMURA Yoshisato 東京工業大学, 総合理工学研究科(研究院), 准教授 (90262295)
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| Co-Investigator(Kenkyū-buntansha) |
CHAI Yaw-wang 東京工業大学, 大学院総合理工学研究科, 特任助教 (80455922)
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| Project Period (FY) |
2011-11-18 – 2014-03-31
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| Keywords | 熱電材料 / 格子欠陥制御 / 規則構造 / 相界面 / 相平衡 / 状態図 / 金属物性 |
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| Research Abstract |
Thermoelectric power generation system, that enables to generate electrical power by the temperature difference based on unused thermal power resources, can contribute greatly to the reduction of greenhouse gas emission and to the promotion of energy conservation. The objective of the present work is to fabricate thermoelectric materials that have high potential for the practical use, excellent cost performance and environment-friendly compositions. Interests of this work were focused on half-Heusler compounds to propose new and original approaches for improving thermoelectric properties by positively controlling several types of lattice defects, defects in ordered atomic arrangements (ordered structure). Consequently, the enhancement of thermoelectric performance of half-Heusler compound alloys was successfully achieved by controlling a good balance of electrical properties and thermal properties.
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