Digitalfire Ceramic Glossary

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Cordierite Ceramics


Cordierite ceramics get their properties from the presence of cordierite crystals. They are made using high purity talc with low CaO content that will seed the development of the crystals. The cordierite crystals are grown and aligned in the ceramic matrix by the use of firing curves that apply the exact temperature and cooling rate needed. The low thermal expansion material that this process creates has great resistance to failure induced by sudden temperature change. Automotive catalytic converters constantly heat up and cool down, they are made from cordierite bodies. Cordierite is also refractory. Cordierite kiln shelves are common. While cordierite ceramic vessels could be made, the material has such a low thermal expansion it is very difficult (or impossible) to match a glaze (without crazing).

Out Bound Links

In Bound Links

  • (Materials) Talc - Mg3Si4O6 or 3MgO.4SiO2.H2O

    Magnesium Silicate, Steatite, French Chalk, Hydrated talc

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