Thermoelectric properties of Co-substituted melt-grown higher manganese silicides

HIROKI NAGAI; Haruki Hamada; Kei Hayashi; Yuzuru Miyazaki

Presentation information

Oral presentation

9 Applied Materials Science » 9.4 Thermoelectric conversion

[15p-E206-1~15] 9.4 Thermoelectric conversion

9.4と16.2のコードシェアセッションあり

Wed. Mar 15, 2017 1:45 PM - 6:15 PM E206 (E206)

Kaoru Toko(Univ. of Tsukuba), Hiroya Ikeda(Shizuoka Univ.), Kazuya Okamoto(Tokyo Univ. Sci., Yamaguchi)

6:00 PM - 6:15 PM

△ [15p-E206-15] Thermoelectric properties of Co-substituted melt-grown higher manganese silicides

〇HIROKI NAGAI¹, Haruki Hamada¹, Kei Hayashi¹, Yuzuru Miyazaki¹ (1.Tohoku Univ.)

Keywords:higher manganese silicides

In this study, we obtained Co-substituted melt-grown higher manganese silicides (Mn_1-xCo_xSi_γ) to improve their thermoelectric (TE) performance. As the results for TE properties measurement, Co-substituted samples exhibited higher electrical conductivity than Co-free sample. On the other hand, Seebeck coefficient for Co-substituted samples decreased compared with that of Co-free sample. Consequently, the maximum of power factor S²σ for Mn_0.96Co_0.04Si_γ sample was S²σ = 2.0×10^-3 W/mK² (800 K), which was about 60% higher than that of Co-free sample.