CALCULATED UNCERTAINTY OF THE THERMAL DIFFUSIVITY MEASUREMENT BASED ON FLASH LASER METHOD

Fabrício Lima Migliorini, Egonn Hendrico Carvalho Silva, Pablo Andrade Grossi, Ricardo Alberto Neto Ferreira, Denise das Mercês Camarano

Abstract

Flash methods have become one of the most commonly used techniques for measuring the thermal diffusivity and thermal conductivity of solids and liquids. This method has received standard status for the measurement of thermal diffusivity of materials such as metals, carbon materials, ceramics and polymers. An uncertainty analysis of the thermal diffusivity measurement using the laser flash method will be presented in this paper. This metrological investigation follows the general rules for evaluating and expressing the uncertainty in the LMPT – Laboratório de Medição de Propriedades Termofásicas (Thermophysical Properties Measurement Laboratory), summarizing the main sources of uncertainties. Experiments were carried out on Pyroceram 9606 at room temperature to determine the uncertainty assign to the thermal diffusivity measurements.

Keywords

flash method, thermal diffusivity, uncertainty analysis

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IMEKO-WC-2009-TC12-126.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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