초록 ▼

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 cons

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 all or part of the ceramic fibre material. The resulting materials have a reduced tendency to sinter and consequently shrink at high temperatures.

대표청구항 ▼

Thermal insulation material comprising an unsintered mixture of microporous silica aerogel and a ceramic material including both ceramic reinforcing fibres and alumina, said alumina being present as at least a portion of said fibres or as particles or as both fibres and particles and said unsintered

Thermal insulation material comprising an unsintered mixture of microporous silica aerogel and a ceramic material including both ceramic reinforcing fibres and alumina, said alumina being present as at least a portion of said fibres or as particles or as both fibres and particles and said unsintered mixture being formed by intimately mixing as solids said ceramic material and fine particles of said silica aerogel and compacting said intimately mixed solids under pressure to form a self-bonded body, said ceramic material containing said alumina in an amount sufficient to raise the temperature to which said self-bonded body can be heated without significant shrinkage due to sintering of said mixture.