[15p-K307-1~14] 9.4 Thermoelectric conversion

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)

[15p-K307-10] P-type thermoelectric properties of half-Heusler alloy TiNi_1-x-yCo_ySn (0 ≤ x ≤ 0.1, 0 ≤ y ≤ 0.05)

〇(D)Kosuke Yamazaki¹, Taegyun Kim¹, Hiroshi Nakatsugawa¹ (1.Yokohama Natl. Univ.)

Keywords:

half-Heusler,P-type thermoelectric,TiNiSn

In this study, we attempted to prepare samples with a reduced Ni composition ratio (x≠0) in order to increase ZT of the P-type thermoelectric material TiNi_1-x-yCo_ySn. The samples were prepared by arc melting method and heat treatment. Thermoelectric properties were measured in the temperature range from 80 to 800 K. The results show that ρ decreases as x increases. And |S| was maintained up to a certain x. The result, the increase of the power factor was observed. The increase in ZT compared to that for the stoichiometric composition (x=0) shows that a constant decrease in the Ni composition ratio (x≠0) is effective in increasing the ZT.