2013 Fiscal Year Final Research Report
Study on anisotropy and optimization of thermoelectric properties of thermoelectric materials by a Seebeck micro-probe method
| Project/Area Number |
23560363
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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 |
Electronic materials/Electric materials
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| Research Institution | Ehime University (2013)
Japan Advanced Institute of Science and Technology (2011-2012) |
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Principal Investigator |
NAKAMOTO Go 愛媛大学, 教育学部, 准教授 (10283152)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 熱電変換材料 / マイクロプローブ法 |
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| Research Abstract |
In this study, a two-dimensional Seebeck coefficient measurement system has been developed by a micro-probe method and two-dimensional distribution of Seebeck coefficient has evaluated for various thermoelectric materials. It is revealed that the anisotropic Seebeck coefficient reflecting the grain distribution in the zinc-antimonide system. In the bismuth-terullide system, it is found that the sign inversion of the Seebeck coefficient from p- to n-type occurs originating from the gradient of the excess Te content along the crystal growth direction. As a result, the evaluation method of microscopic thermoelectric properties has been established by using the Seebeck micro-probe method. It is expected that the Seebeck micro-probe method becomes one of the new and powerful ways for measurement of microscopic physical properties for various functional materials.
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