Cristobalite is a high temperature modification of silica. In contrast to silica cristobalite is rarely existent in nature. Therefore cristobalite is made out of pure silica by heating it up to 1.500°C. Through this calcining-process the lattice is expanded and the density is reduced to 2.35 g/cm³. The thereby generated air bubbles lead to a negative refractive index and an outstanding brightness. Like silica cristobalite is chemically inert. Products from medium grain sizes from 300 µm down to micronized powders with only 1m are available.
hardness 6.5 (Mohs)
density 2.35 g/cm³
high brightness (Y > 94)
high chemical resistance
low thermal expansion: 54*10-6/K (at T 20-300°C)
dispersion outdoor paints and plasters
engineered stone made of PMMA, UP
road markings
antiblocking-additives in PP- and PE-films
dental casting material
silicone sealants
precision casting
SILBOND® / SIKRON® / SILMIKRON®