[14a-K210-1~9] 13.2 Exploratory Materials, Physical Properties, Devices

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[14a-K210-3] Thermal conductivity measurement of Mg₂Si thermoelectric materials under high pressure

〇YOSHIHISA Mori^1,2, RYO Okami², YUKA Akimoto¹, Takashi Yoshino³ (1.Okayama Univ. of Sci, 2.Okayama Univ of Sci, 3.Okayama Univ.)

Keywords:

high pressure,thermal conductivity,thermoelectric material

We have attempted to measure the thermal conductivity of Mg₂Si thermoelectric materials under high pressure. Until now, due to the structure of the high-pressure cell, thermoelectric performance under high pressure has been limited to the measurement of the Seebeck coefficient and electrical conductivity. This time, we modified the high-pressure cell so that the thermal conductivity can be measured at the same time, and performed the measurement.
As a result, we succeeded in obtaining the phase difference parameters necessary to determine the thermal conductivity. However, since it is difficult to obtain all the parameter values under high pressure, the values at ambient pressure were used for this purpose, and the calculation results were reasonable compared to the results of the theoretical calculations that were performed in parallel.