[24a-E205-1~11] 9.4 熱電変換

▼ [24a-E205-5] Optimization of Co addition amount to enhance thermoelectric properties of β-FeSi₂

〇(D)Sopheap Sam¹、Genki Kashika¹、Hiroshi Nakatsugawa¹、Yoichi Okamoto² (1.Yokohama National Univ.、2.National Defense Academy)

キーワード：Thermoelectric properties, Silicides, ZT value

In this work, the improvement of thermoelectric performance of β-FeSi₂ by modifying scattering mechanism with impurity doping namely Co has been investigated. In β-Fe_1-xCo_xSi₂ (0≤x≤0.06), the optimum level is obtained in x=0.03 sample with the optimum carrier concentration about 1.0(4)×10²⁰ cm^-3, where the highest ZT is about 0.087 at 670K owing to the significant enhancement in power factor.