Seebeck Coefficient

The Seebeck coefficient is the ratio of the induced thermoelectric voltage to the temperature difference between two points at an electrical conductor. The SI unit of the Seebeck coefficient is volts per Kelvin (V/K), although it is more often given in microvolts per Kelvin (μV/K). The use of materials with a high Seebeck coefficient is one of many important factors for the realization of efficient behavior in thermoelectric generators (high ZT-value).            

The NETZSCH SBA 458 Nemesis® can be used to measure both the electrical conductivity and the Seebeck coefficient simultaneously between -125°C and 1100°C.

Measurement setup of the SBA 458 Nemesis® for the temperature range between RT and 1100°C

NETZSCH Seebeck Systems

SBA 458 Nemesis®

Thermoelectric materials should possess high working temperatures and optimized efficiency. The relative performance is described by the figure of merit (ZT). It highlights the importance of the Seebeck coefficient with respect to the performance. The SBA 458 Nemesis® allows for simultaneous measurement of the Seebeck coefficient and electrical conductivity under indentical conditions.