Thermomechanical response of thermoelectrics

We have theoretically investigated the product ofelastic modulus and linear coefficient ofthermal expansion for 20 thermoelectrics. The product is inversely proportional to equilibrium volume, which is consistent with the Debye-Gr üneisen model. Oxides exhibit larger products, while the products of Te-containing thermoelectrics are considerably smaller. This is likely due to strong bonding in these oxides, which makes them prone to thermal stress, thermal shock, and thermal fatigue. As this product is rarely available in lit erature and the equilibrium volume is easily measurable, this work provides a quick estimation for thethermomechanical response of thermoelectric phases.

Source: Applied Physics Letters - December 2, 2016 Category: Physics Authors: Denis Music, Richard W. Geyer and Philipp Keuter Source Type: research