All-in-one type apparatus for measuring thermoelectric properties of the thermoelectric devices has been developed. This apparatus gives Seebeck coefficient, electrical conductivity, and thermal conductivity simultaneously, which give the thermoelectric figure-of-merit of the thermoelectric modules and materials. In this study, we present the apparatus for evaluating the thermoelectric figure-of-merit of the thermoelectric devices in the range of 150 °C and 700 °C using guarded hot plate method.
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