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Cristobalite—synthesized from quartz

QuartzKaolinFeldspar

Cristobalite is a high-temperature modification of quartz and, in contrast to quartz, its occurrence in nature is very seldom. For this reason, cristobalite is synthetically produced for industrial purposes from pure quartz in a rotary kiln at a temperature of approx. 1,500 °C. A fractured grain surface, a high degree of whiteness and a density reduction to 2.35 g/cm3 is achieved by the calcination. Like quartz, cristobalite is chemically inert and is therefore popular as a filler in a variety of processes and products.

Technical properties:

  • hardness: 6.5
  • density: 2.35 g/cm³
  • high chemical resistance
  • thermal expansion coefficient: 54*10-6/K (at T 20 – 300 °C)
  • high degree of whiteness (Y value > 94)

Through non-ferrous milling and screening processes Quarzwerke is in a position of being able to make micronized cristobalite powders with a medium granularity of up to 1 µm.

Our cristobalite flours and powders are available uncoated under the trade name SIKRON®. The salinized types are available under the trade name SILBOND®.

We can therefore guarantee that we have the optimal solution for your application!

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