2022 Fiscal Year Final Research Report
Development of thermoelectric module of the silicide materials synthesized under pressure
| Project/Area Number |
20K04336
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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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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Okayama University of Science |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 熱電材料 / シリサイド / 高圧合成 / SPS合成 / 排熱 |
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| Outline of Final Research Achievements |
We have studied high-pressure synthesis of Mg2Si thermoelectrics using a piston-cylinder apparatus and a clamp-type high-pressure cell. In order to improve productivity, which is a drawback of high-pressure synthesis, we have combined our research and development with an SPS apparatus suitable for mass production.
As a result, productivity was dramatically improved, and thermoelectric performance and durability of the synthesized thermoelectric elements were also improved. Furthermore, by integrating the electrode and element during SPS synthesis, the contact resistance between the electrode and element was successfully reduced significantly.
On the other hand, a thermoelectric property measurement system using a 6-axis multi-press was developed to measure the thermoelectric properties of SPS-synthesized Al-doped Mg2Si under high pressure.
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| Free Research Field |
高圧物性
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| Academic Significance and Societal Importance of the Research Achievements |
学術的意義として，電極と熱電素子をSPS装置によって一体合成することで接触抵抗が大きく減少した現象が，その電極との接触界面における状況を理解するために重要な知見を与えることができた．また，6軸装置を利用して開発した高圧下での熱電性能測定装置を使ってAlドープMg2Si熱電材料の熱電性能を測定した結果は，SPS合成時に印加する加重によって合成物の熱電物性に与える影響を理解する上で重要な情報を与えることになった．
社会的意義として，これまでの高圧合成技術を発展させるために活用したSPS装置は，合成の効率を飛躍的に向上させるだけでなく，合成物の耐久性も向上させることができたので，応用面でも期待される．
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