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

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)

[10p-N201-6] P-type thermoelectric properties of half-Heusler alloy (Ti, Zr, Hf)Ni_0.92Co_0.05Sn

〇Kosuke Yamazaki¹, Ryo Kaneko¹, Hiroshi Nakatsugawa¹ (1.Yokohama Natl. Univ.)

Keywords:

Thermoelectric,half-Heusler,TiNiSn

TiNiSn is a candidate for practical thermoelectric material due to its low toxicity and favorable mechanical properties. However, its P-type thermoelectric properties have not been fully explored. In our previous study, we investigated the dimensionless figure of merit (ZT) of TiNi_0.92Co_0.05Sn by optimizing the carrier concentration through Co substitution at Ni site and reducing the Ni content. In this study, to reduce lattice thermal conductivity, (Ti, Zr, Hf)Ni_0.92Co_0.05Sn alloys were prepared by arc melting and heat treatment, where Zr or Hf partially substituted Ti. The thermoelectric properties and ZT values were then evaluated.