Enhanced thermoelectric properties of chimney-ladder type higher manganese silicides

Yuzuru Miyazaki, Haruki Hamada, Yuta Kikuchi, Kei Hayashi

研究成果: ジャーナルへの寄稿総説査読

抄録

To further enhance thermoelectric (TE) properties of higher manganese silicides (HMSs), the dissipation of layered precipitates of the MnSi phase as well as the optimization of the hole carrier concentration are critical. We have systematically studied electronic structure of partially substituted solid solutions of (Mn1-xMx)Si1.7 with M = transition metals and prepared bulk samples of such solid solutions by spark plasma sintering. A 2 at% substitution of manganese with vanadium is found to dissipate the MnSi-precipitates effectively, results in a substantial increase in electrical conductivity from 3 × 104 S/m to approximately 5 × 104 S/m at 800 K. The resulting TE power factor reaches 1.86 mW/K2m at 710 K, 30% higher than that of V-free samples.

本文言語英語
ページ(範囲)461-466
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
64
8
DOI
出版ステータス出版済み - 2017 8月

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