The relationship between capacitive signal and variable gap size between the capacitor plates of the cell can be obtained by heating a copper disc which transmits its thermal expansion to the sample without exchanging heat with the sample itself. The method allows the determination of thermal diffusivity with a repeatability of about 3% for low conducting materials with thermal expansion coefficients greater than 0.5*10-5 K-1.

Calibration of Capacitive Cells for Dilatometric Measurements of Thermal Diffusivity / Omini, MARCO LUIGI; Sparavigna, Amelia Carolina; Strigazzi, Alfredo. - In: MEASUREMENT SCIENCE & TECHNOLOGY. - ISSN 0957-0233. - 1:11(1990), pp. 1228-1231. [10.1088/0957-0233/1/11/015]

Calibration of Capacitive Cells for Dilatometric Measurements of Thermal Diffusivity

OMINI, MARCO LUIGI;SPARAVIGNA, Amelia Carolina;STRIGAZZI, Alfredo
1990

Abstract

The relationship between capacitive signal and variable gap size between the capacitor plates of the cell can be obtained by heating a copper disc which transmits its thermal expansion to the sample without exchanging heat with the sample itself. The method allows the determination of thermal diffusivity with a repeatability of about 3% for low conducting materials with thermal expansion coefficients greater than 0.5*10-5 K-1.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/1660312
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