High Temperature Thermoelectric Properties of Half-Heusler Compound PtYSb

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概要

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• Recent experimental examination of the thermoelectric properties of the half Heusler compound PtYSb has revealed that PtYSb has a relatively high thermoelectric figure of merit (ZT) of 0.2 at around room temperature. However, the thermoelectric properties have been examined only in the low-temperature region, and no high-temperature data has been reported to date. Here we present the high-temperature thermoelectric properties of polycrystalline bulk samples of PtYSb in the temperature range between room temperature and 973 K. The Seebeck coefficient was positive over the entire temperature range examined. A high power factor (2.1\times 10^{-3} W m^-1K^-2) and low thermal conductivity (3.44 W m^-1K^-1) were obtained at 973 K, which resulted in a relatively high ZT of 0.57 for PtYSb. Thus, PtYSb has the potential for application as a p-type thermoelectric material at high temperature.

• 2013-04-25

著者

• KUROSAKI Ken

  Graduate School of Engineering, Osaka University

• MUTA Hiroaki

  Graduate School of Engineering, Osaka University

• OHISHI Yuji

  Graduate School of Engineering, Osaka University

• YAMANAKA Shinsuke

  Graduate School of Engineering, Osaka University

• Ohishi Yuji

  Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Li Guanghe

  Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

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