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ID 115306
著者
Bumrungpon, Mongkol Tokushima University
Morioka, Issei Tokushima University
Yasufuku, Ryusuke Tokushima University
Hirai, Toshiharu Tokushima University
Hanasaku, Kenichi Tokushima University
Hirota, Kenji Tokushima University
Takagi, Katsuhiro Tokushima University
キーワード
eco-materials
thermoelectric materials
powder metallurgy
lead telluride
microstructure
資料タイプ
学術雑誌論文
抄録
Undoped PbTe was melted at 1123 K, ball milled (BM) at rotation speeds from 90 to 180 rpm and hot pressed (HP) at 147 MPa and 650 K. Milling at 120 rpm produced the minimum phonon thermal conductivity of 1.29 W m−1 K−1 and average grain size of 0.80 µm. Phonon thermal conductivity was constant from coarse grain size to fine grain size of 1 µm and decreased suddenly at 0.80 µm. This tendency of phonon thermal conductivity corresponded to theoretical calculations with grain boundary scattering. However, the observed critical point of 1 µm was much larger than the calculated value of 0.03 µm. There was a significant inverse relationship between phonon thermal conductivity and FWHM of X-ray diffraction peaks. The low phonon thermal conductivity was associated with not only grain boundary scattering but high internal strain.
掲載誌名
Materials Transactions
ISSN
13459678
13475320
cat書誌ID
AA1151294X
出版者
The Japan Institute of Metals and Materials
61
10
開始ページ
2025
終了ページ
2029
発行日
2020-09-25
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
出版社版
部局
理工学系