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Abstract : Measurements on the thermal transport in SiO2 aerogel tiles thickness about 8 mm were performed for two densities ρ = 110 kg.m-3 and 270 kg.m-3, for emissivities ε = 0,04 and 0,77, in air and evacuated. The covered temperature range was 100 K to 650 K. In addition for density ρ = 70 kg.m-3 the thermal losses were determined for two thicknesses differing by a factor of two. For proper interpretation wavelength dependent IR radiative transmission measurements were performed. Data evaluation proceeded along the methods developed for optically thin, non-grey materials.





Autor: R. Caps G. Döll J. Fricke U. Heinemann J. Hetfleisch

Fuente: https://hal.archives-ouvertes.fr/



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