Heat Transfer Properties of Optically Thin Aerogels

Heat Transfer Properties of Optically Thin Aerogels 

The physical-mathematical description of the heat transfer in optically thin aerogels leads to coupled nonlinear integrodifferential equations which cannot be treated analytically. In the heat transfer equation, (23.1), the heat source term O considers the net radiative heat flux into the infinitesimal volume element where this equation is defined  

Thermal Conductivity of Aerogeis Powders, Granuiates, and Aerogei Composites 

Beds of aerogel granulate or powder are used for technical thermal insulation (Part 15), because they offer specific advantages in comparison to standard insulation materials, e.g., they can be poured into complicated shaped cavities. Opacified aerogel powders and granulates are used as thermal insulation in space applications [55], automotive applications 

Commercially available flexible aerogel blankets - which are a composite material of silica aerogel synthesized within a fiber matrix - show excellent thermal insulation performance from cryogenic to high temperatures. The heat transfer within these material systems can be described in the same manner as for optically thick aerogels. Additionally, degradation in the thermal conductivity can be observed in some cases, if the flexible blankets are 

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