Description
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.
PA Measurement Setup for Varied Sample Geometries The SBA 458
Nemesis® is heralded for its unique measurement setup, which accomodates more sample geometries than usually for this technique. Measurements can be carried out at temperatures up to 800°C.
Quick Start to Measurements – Convenient Sample Change Changing samples is accomplished quickly and easily by hand, without any tools. This prevents potential damage to the sample from sticking to the electrodes.
Integrated Quality Check – Outstanding Two-Heater System The SBA 458
Nemesis® has two heavy systems that are employed in an alternating manner for each temperature step. Deviations from linearity and hysteresis due to inaccurate measurement can be immediately observed before and during the measurement
Highly Reliable and Rugged Design – Avoiding Diffusion Problems The thermocouples are firmly anchored and are immobilized during the measurements by a defined contact force resulting from the mass and the cold spring. Sheating of the thermocouples prevents diffusion from cementing them to the sample.
No Distance Determination Required Since the thermocouple positions are fixed, the cumbersome process of determining their distance before each measurement is eliminated. Eliminating this potential source of error in determining electrical conductivity increases the precision and reproducibility of the results.