[21p-C102-1~17] 9.4 Thermoelectric conversion

[21p-C102-10] Thermoelectric Properties of Ge/Ba₈Ga₁₆Si₃₀ Composite by Planetary Ball Milling

〇(M1)Hirotaka Ishizu¹, Katsuaki Hashikuni¹, Hiroaki Anno¹ (1.Sanyo-Onoda City Univ.)

Keywords:clathrate, Thermoelectric conversion

The effect of volume fractions of Ge on the thermoelectric properties in Ge/Ba₈Ga₁₆Si₃₀ composites prepared by sintering a mixture of N-type Ge and Ba₈Ga₁₆Si₃₀ pulverized by planetary ball milling was investigated. Compared to the bulk Ba₈Ga₁₆Si₃₀, the Seebeck coefficient of Ge/Ba₈Ga₁₆Si₃₀ increased in the low temperature range and the thermal conductivity decreased. This may be due to the interfacial scattering at the grain boundaries of the refined crystal grains.