A very low thermal expansion ceramic based on lithium aluminium silicate.
It is used in places where it has to resist extreme thermal shock, and places where the integrity of a structure can only be maintained if there is almost zero thermal expansion.
It is lightweight, insulating and strong. The bulk density is 1,8kg / litre.
The apparent porosity is 24 volume %.
The modulus of rupture is around 30MPa.
The coefficient of thermal expansion is 0,3 x 10-6/C, about a tenth of the average for ceramics.
Keralith can be used at up to 1220°C.
Thin walled ceramics can be made in Keralith. It is slip cast and fired.
Development no. 87605