LSR – Constantan – Seebeck coefficient – Thermoelectric properties

Seebeck Coefficient Measurement of the Constantan reference sample – Thermoelectric properties

Bismuth telluride stands out as the sole NIST-certified reference material for the Seebeck coefficient, but its usage is limited to a maximum temperature of 120°C. In contrast, Constantan offers a higher temperature calibration option, with usability extending up to 800°C. The slope technique enhances accuracy in Seebeck coefficient measurements by employing various temperature gradients at each individual temperature.

App. Nr. 02-009-004 LSR – Constantan – Seebeck coefficient – Thermoelectric properties

In Application Number 02-009-004 LSR, the Seebeck coefficient of Constantan is examined over a temperature range from -140°C to +180°C (130K to 450K). The Seebeck coefficient is measured using the slope technique, as illustrated in the inset, at each temperature point. Multiple temperature gradients are applied to the sample at each temperature, and the Seebeck coefficient is calculated from the slope of the resulting straight line. The results can be presented either as the relative Seebeck coefficient against Pt or as the absolute Seebeck coefficient.

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