A material having good thermal insulation properties can be made from an intimate mixture of a microporous silica aerogel, a ceramic fibre material and optionally an opacifier. According to the invention alumina is added to those mixtures, e.g. in the form of alumina particles or alumina fibres constituting...http://www.google.de/patents/US4221672?utm_source=gb-gplus-sharePatent US4221672 - Thermal insulation containing silica aerogel and alumina
