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Scanning Thermoelectric Power

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STEP

Contact details

Risanti, Doty Dr
Aerospace Engineering (LR), Fundamentals of Advanced Materials
Kluyverweg 1, 2629 HS Delft
Tel : +31 (0)15 27 88621
E-mail : d.d.risanti@tudelft.nl
Website : Open website

General Information

Instrument:

Scanning Thermoelectric Power

Description

The TEP instrument uses two heat cells which can both be controlled heated with an electric furnace and cooled with liquid nitrogen through a heat exchanger within the furnace block.

Location:

Aerospace Engineering, Kluyverweg 1

Key words:

SEEBECK effect

Instrument specification

The device allows measurements in a temperature range of –190°C to +250°C with a temperature stability of better than 0.01 K. The temperature difference between the two cells typically about 10 K can be applied (DT). A thin plate samples with 7 mm length, 2 mm width and 1 mm thickness  geometry can be used. The samples are clamped with a

small, constant mechanical pressure on the two high-purity (99.9995%) aluminium electrodes which are in intimate contact with the two heat cells. The voltage (DV in microvolts) is generated across the specimen. TEP values are calculated with respect to pure aluminum as reference: DS = DV/DT. TEP values are sensitive to the microstructural change of alloys, such as: impurities, solute level, austenitic-martensitic transformation.