[10p-N201-1~7] 9.4 Thermoelectric conversion

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)

[10p-N201-5] Preparation of Type-Ⅲ Fe-Substituted Clathrate and its Thermoelectric Properties

〇(M1)Taiki Ogawa¹, Hiroaki Anno¹ (1.Sanyo-Onoda City Univ.)

Keywords:

Type-III clathrate,Thermoelectric properties,Fe-substitution

In order to reduce the impurity phases and improve thermoelectric properties of Type-Ⅲ Ba₂₄Ge₁₀₀ clathrate with Fe substituted for Ge, samples were synthesized and examined by combining arc melting, spark plasma sintering (SPS), and annealing processes under several conditions. As a result, it was confirmed that the impurity phase FeGe₂ was reduced and the electrical conductivity σ was improved in the samples prepared by arc melting, annealing at 800 ℃, and SPS in this order. However, the effect of carrier concentration reduction by Fe substitution was found to be low.