| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-10-07 |
| タイトル |
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タイトル |
Thermoelectric Properties of Ba8CuxSiyGe46–x–y Clathrates Synthesized by the Czochralski Method |
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言語 |
en |
| 著者 |
Takagi, Kentaro
Matsukawa, Yuko
Araki, Shuto
Saeki, Ryusei
Yamasaki, Shigeto
Arita, Makoto
Munetoh, Shinji
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
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権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Applied Energy Materials], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [https://pubs.acs.org/articlesonrequest/AOR-QTEBPYQACNCA8HR3ZCWM].” |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
A type-I clathrate Ba8CuxSiyGe46–x–y ingot consisting of millimeter-sized grains with different crystallographic orientations was synthesized by the Czochralski method. The lower part of the ingot contained more Cu and Ge within the clathrate phase. The electrical resistivities of the top, middle, and bottom of the ingot at 550 °C were 0.78, 1.72, and 1.55 mΩ·cm, respectively. The differences in these values are consistent with the carrier concentration and calculated anisotropic effective mass of the electrons, which are based on the actual chemical composition and crystal orientation, respectively. The resistivity of the top part with few grain boundaries is less than a quarter of that of the hot-pressed sample with a similar composition. Despite the different carrier concentrations, the Seebeck coefficient of all parts had similar values of approximately −120 μV/K at 550 °C. The thermal conductivity at 350 °C was approximately 3.0 W/m·K for top part and 2.5 W/m·K for middle and bottom parts, about 1.5–1.8 times larger than those of previous reported hot-pressed samples. The power factor and dimensionless figure of merit ZT value of the top reached 18.8 μW/cm·K2 and 0.34, respectively. These results indicate that fabrication by the Czochralski method can improve the thermoelectric performance of Ba8CuxSiyGe46–x–y clathrates. |
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言語 |
en |
| 出版者 |
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出版者 |
ACS Publications |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1021/acsaem.3c02961 |
| 収録物識別子 |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
2574-0962 |
| 書誌情報 |
en : ACS Applied Energy Materials
巻 7,
号 7,
p. 2665-2670,
発行日 2024-04-08
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Manuscript3_Takagi.pdf (1.3 MB)
