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ID 117176
著者
Bumrungpon, M. Tokushima University
Maeda, T. Tokushima University
Tachii, M. Tokushima University
Asai, J. Tokushima University
Morioka, I. Tokushima University
Yasufuku, R. Tokushima University
Hirai, T. Tokushima University
Tsubochi, T. Tokushima University
Kanaya, T. Tokushima University
Dauscher, A. CNRS-Université de Lorraine
キーワード
Thermoelectric materials
Chalcogenides
Electrical properties
Thermal conductivity
資料タイプ
学術雑誌論文
抄録
This study focused on investigating the influence of processing undoped, dense lead telluride (PbTe) either via mechanical grinding (MG) or mechanical alloying (MA), based on the milling rotation speed (1.5–3.0 Hz), followed by hot pressing (HP) on the grain size and phonon thermal conductivity (κphonon). The samples prepared via MG-HP were single-phased, had high relative densities (> 99%), and exhibited uniform morphologies. For a milling rate of 2.5 Hz, the minimum κphonon of MG-HP was 0.90 W m−1 K−1 and the average grain size was 0.47 µm. Furthermore, the grains produced by MG-HP and milled at 2.5 Hz comprised subgrains with a size of approximately 50 nm. The samples prepared using MA-HP showed higher theoretical relative densities. For a milling rate of 2.0 Hz, the minimum κphonon of MA-HP was 1.36 W m−1 K−1 and the average grain size was 0.52 µm. The electrical conductivity and Seebeck coefficient of MG-HP and MA-HP were similar to those of the p-type doped materials. Thus, the MG-HP process is an appropriate method for producing undoped PbTe with a high Seebeck coefficient and a low κphonon.
掲載誌名
Journal of Physics and Chemistry of Solids
ISSN
00223697
cat書誌ID
AA00704949
AA11534013
出版者
Elsevier
169
開始ページ
110829
発行日
2022-06-07
権利情報
© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系