Research on Reusable Properties of Silica Aerogel Composites

In order to research the reusability of the high speed flight vehicle in the future, according to the practical application environment of the silica aerogel composites, the silica aerogel composites were single-side heat treated at 400 degrees C for 1800 s, evaluating the stability of silica aerogel composites at 400 degrees C via monitoring the mass loss ratio, size shrinkage ratio, insulation properties and microstructure change. The results indicate that silica aerogel composites exhibit excellent stability after single-side heat treatment 10 times, including the variations of mass loss, XYZ direction size shrinkage, and thermal conductivity. The variation of elevated temperature and ambient temperature thermal conductivity and microstructure are very small. It is concluded that silica aerogel composites are stable after 10 times single-side heat treatment.