Features
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An Infrared Gold Image Furnace with excellent temperature controllability and a micro-heater for temperature difference control.
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The measurements are controlled by a computer and enable to perform the measurements at specified temperatures on each temperature difference which eliminates dark electromotive force and allows automatic measurements.
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Ohmic contact automatic check function (V-I plot) as a standard function.
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Available to measure a thin film with an original adapter as an option.
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Customizable to high-resistance type.
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Applications
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Evaluate the thermoelectric properties of a wide variety of materials including semiconductors, ceramics, and metals.
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Measurement Principle
A prism or cylindrical sample is set in a vertical position between the upper and lower blocks in the heating furnace. While the sample is heated, and held, at a specified temperature, it is heated by the heater in the lower block to provide a temperature gradient.
Seebeck coefficient is measured by measuring the upper and lower temperatures T1 and T2 with the thermocouples pressed against the side of the sample, followed by measurement of thermal electromotive force dE between the same wires on one side of the thermocouple.
Electric resistance is measured by the dc four-terminal method, in which a constant current I is applied to both ends of the sample to measure and determine voltage drop dV between the same wires of the thermocouple by subtracting the thermo-electromotive force between leads.
