Thermoelectric Properties of Na-doped Mg<sub>2</sub>Si<sub>0.25</sub>Sn<sub>0.75</sub>
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- Udono H.
- Graduate School of Sci. and Eng., Ibaraki Univ.
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- Kumagai S.
- Mitsuba Corporation
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- Fujiu H.
- Mitsuba Corporation
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- Isoda Y.
- National Institute for Material Science
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- Shinohara Y.
- National Institute for Material Science
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- Tada S.
- Mitsuba Corporation Graduate School of Sci. and Eng., Ibaraki Univ.
書誌事項
- 公開日
- 2013
- DOI
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- 10.14723/tmrsj.38.17
- 公開者
- 一般社団法人 日本MRS
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説明
We have investigated the thermoelectric properties of Na-doped Mg2Si0.25Sn0.75 solid solutions prepared by liquid-solid reaction and hot-pressing methods. Na doping was carried out by mixing sodium acetate (CH3COONa) into the starting materials Mg (nominal purity: 99.9 %), Sn (99.999 %) granules, and Si powder (99.9999 %). The Na-doped samples had p-type conductivity with positive signs of Seebeck and Hall coefficients. Furthermore, hole concentrations increased rapidly with an increase in the amount of Na doping. These results revealed that the Na atoms acted as acceptors in Mg2Si0.25Sn0.75. The Seebeck coefficient of Na-doped samples showed positive values between 300 and 750 K. A maximum power factor of 0.88 × 10-3 WmK-2 was observed for the Mg2Na0.020Si0.25Sn0.75 sample at 500 K. The dimensionless figure of merit ZT reached 0.17 at 450 K for all Na-doped samples.
収録刊行物
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- Transactions of the Materials Research Society of Japan
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Transactions of the Materials Research Society of Japan 38 (1), 17-20, 2013
一般社団法人 日本MRS
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詳細情報 詳細情報について
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- CRID
- 1390282680489751680
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- NII論文ID
- 130005004184
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- COI
- 1:CAS:528:DC%2BC3sXmslWnt7o%3D
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- ISSN
- 21881650
- 13823469
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
