Thermal Conductivity of SiO2-Aerogel Tiles
The production of highly transparent silica aerogel tiles has been strongly motivated by high-energy physicists who wanted to use this material with low index of refraction in Cerencov counters . Today tiles of excellent optical quality with densities between about 75 and 300 g/l corresponding to indices of refraction between 1.015 and 1.060 and with sizes of 20 × 20 cm2 are available . Though these tiles might also have a potential as transparent superinsulating spacers in window systems in the future ,right now we consider them primarily as indispensable systems for investigations of the thermal transport in highly porous monolithic materials, which allow the optimization of cheaper granular aerogel fillings.
KeywordsPorosity Refraction Flange Emissivity Percolate
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