Aerogel–aerogel composites for thermal insulation applications were synthesized.
Highly insulating granular silica aerogel was embedded in a RF aerogel matrix.
Plates up to 140 × 140 × 20 mm³ with a density of 0.19–0.27 g/cm³ were produced.
Thermal conductivity of materials is between 0.026 and 0.053 W/mK.
Composites are applicable at normal temperature range < 200 °C.