Thermoelectric properties of single crystalline Ba8Al xSi46-x clathrate by using flux Czochralski method

Yuya Nagatomo, Naoki Mugita, Yusuke Nakakohara, Makoto Saisho, Mikihito Tajiri, Ryo Teranishi, Shinji Munetoh

研究成果: ジャーナルへの寄稿Conference article

14 引用 (Scopus)

抄録

Single crystalline Ba8AlxSi46-x clathrates for use as thermoelectric materials were synthesized by the flux Czochralski method. Their aluminum content increased with that of the solution. The Seebeck coeffcients and electric specifc resistances of the Ba8Al xSi46-x clathrates increased with aluminum content, whereas the carrier concentration decreased. The chemical compositions of the single crystalline samples from solutions of Ba8Al 30Si30, Ba8Al40Si30 and Ba8Al50Si30 were Ba7.8Al 14.1Si31.9, and Ba7.8Al14.6Si 31.4, and Ba7.8Al14.9SiSi31.1, respectively. The power factors of the single crystalline Ba 7.8Al14.1Si31.9, Ba7.8Al 14.6Si31.4 and Ba7.8Al14.9SiSi 31.1 at 773 K were 6.86×10-4 7.75×10 -4 and 8.89×10-4 V2/K2Ω m. The results indicate that the carrier concentration of the Ba 8AlxSi46-x clathrates can be controlled by the composition of the solution, and that the flux Czochralski method is effective for synthesizing high performance thermoelectric materials.

元の言語英語
記事番号012008
ジャーナルJournal of Physics: Conference Series
379
発行部数1
DOI
出版物ステータス出版済み - 1 1 2012
イベントInternational Symposium on Materials Science and Innovation for Sustainable Society: Eco-Materials and Eco-Innovation for Global Sustainability, ECO-MATES 2011 - Osaka, 日本
継続期間: 11 28 201111 30 2011

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Czochralski method
clathrates
thermoelectric materials
aluminum
chemical composition

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Thermoelectric properties of single crystalline Ba8Al xSi46-x clathrate by using flux Czochralski method. / Nagatomo, Yuya; Mugita, Naoki; Nakakohara, Yusuke; Saisho, Makoto; Tajiri, Mikihito; Teranishi, Ryo; Munetoh, Shinji.

:: Journal of Physics: Conference Series, 巻 379, 番号 1, 012008, 01.01.2012.

研究成果: ジャーナルへの寄稿Conference article

Nagatomo, Yuya ; Mugita, Naoki ; Nakakohara, Yusuke ; Saisho, Makoto ; Tajiri, Mikihito ; Teranishi, Ryo ; Munetoh, Shinji. / Thermoelectric properties of single crystalline Ba8Al xSi46-x clathrate by using flux Czochralski method. :: Journal of Physics: Conference Series. 2012 ; 巻 379, 番号 1.
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abstract = "Single crystalline Ba8AlxSi46-x clathrates for use as thermoelectric materials were synthesized by the flux Czochralski method. Their aluminum content increased with that of the solution. The Seebeck coeffcients and electric specifc resistances of the Ba8Al xSi46-x clathrates increased with aluminum content, whereas the carrier concentration decreased. The chemical compositions of the single crystalline samples from solutions of Ba8Al 30Si30, Ba8Al40Si30 and Ba8Al50Si30 were Ba7.8Al 14.1Si31.9, and Ba7.8Al14.6Si 31.4, and Ba7.8Al14.9SiSi31.1, respectively. The power factors of the single crystalline Ba 7.8Al14.1Si31.9, Ba7.8Al 14.6Si31.4 and Ba7.8Al14.9SiSi 31.1 at 773 K were 6.86×10-4 7.75×10 -4 and 8.89×10-4 V2/K2Ω m. The results indicate that the carrier concentration of the Ba 8AlxSi46-x clathrates can be controlled by the composition of the solution, and that the flux Czochralski method is effective for synthesizing high performance thermoelectric materials.",
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AU - Munetoh, Shinji

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