2013 Fiscal Year Final Research Report
High-pressure synthesis of silicide thermoelectric material
| Project/Area Number |
23560848
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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 | Okayama University of Science |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 熱電材料 / 高圧合成 / 放射光 / シリサイド |
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| Research Abstract |
Recently thermoelectric material has been studied actively because the material can recover waste heat energy as electric energy. Magnesium silicide (Mg2Si) is expected as an ecological friendly semiconductor. We have researched new functional material by using high-pressure (TP) technique. In this study, HP X-ray diffraction (XRD) at synchrotron radiation facility, HP synthesis by using piston cylinder equipment, and thermoelectric measurement were performed. Furthermore the equipment of thermoelectric measurement for small samples was developed.
The result of HP-XRD study suggested it is difficult for the powder of Mg2Si to replace Ag with Mg under pressure. A mixture of Mg, Si, and Ag powders were reacted below melting point of Mg. Therefore, the mixture were used in the HP-synthesis at 1 GPa for 12 hrs. The result of thermoelectric measurements expects HP technique advance the conduction type of Mg2Si from n-type to intrinsic.
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Research Products
(12 results)
