| abstract |
Composite materials shaped as mats with porosities over 60 % and densities below 0.6 g/cm3 contain an aerogel and fibres distributed therein. The composite materials are characterised in that the aerogel has cracks and in that the aerogel fragments enclosed by the cracks, with an average volume from 0.001 mm3 to 1 cm3, are held together by the fibres. Also disclosed are a process for producing said composite materials and their use. |