Generalizing the flash technique in the front-face configuration to measure the thermal diffusivity of semitransparent solids

Nelson Wilbur Pech-May; Arantza Mendioroz; Agustin Salazar

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Generalizing the flash technique in the front-face configuration to measure the thermal diffusivity of semitransparent solids

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In this work, we have extended the front-face flash method to retrieve simultaneously the thermal diffusivity and the optical absorption coefficient of semitransparent plates. A complete theoretical model that allows calculating the front surface temperature rise of the sample has been developed. It takes into consideration additional effects, such as multiple reflections of the heating light beam inside the sample, heat losses by convection and radiation, transparency of the sample to infrared wavelengths, and heating pulse duration. Measurements performed on calibrated solids, covering a wide range of absorption coefficients (from transparent to opaque) and thermal diffusivities, validate the proposed method.

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《Review of Scientific Instruments》 |2014年第10期|104902-1-104902-6|共6页
作者
Nelson Wilbur Pech-May; Arantza Mendioroz; Agustin Salazar;
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作者单位

Departamento de Fisica Aplicada I, Escuela Tecnica Superior de Ingenieria, Universidad del Pais Vasco UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao, Spain;

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Generalizing the flash technique in the front-face configuration to measure the thermal diffusivity of semitransparent solids

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