TALC For traditional ceramics, electrical ceramics and catalyst supports
Imerys offers a full range of talcs for tiles, sanitaryware, technical ceramics and catalyst supports.
Used in traditional ceramic floor tiles and sanitaryware, talc improves the vitrification process, allowing producers to reduce firing temperatures and shorten firing cycles.
In automotive applications, talc is the principal ingredient of the honeycomb component of catalyst supports and gasoline/diesel particulate filters (G/DPF) where it plays a critical role in controlling the porosity and coefficient of thermal expansion (CTE) of the final product.
Used in combination with other minerals
The role of talc in the ceramics process depends on its interaction with other minerals in the formulation where it has an influence on the following parameters:
- Porosity (water absorption, close, open, etc.)
- Color after firing
- Thermal shock
- Moisture expansion
- Thermal expansion – CTE
- Mechanical resistance (MoR)
- Shrinkage (drying, firing, total shrinkage)
Combined with feldspar or calcium carbonate in the production of traditional ceramics, talc forms a highly effective eutectic flux enabling manufacturers to reduce firing temperatures and firing cycles, facilitating fast firing and lowering energy consumption and CO2 emissions.
Combined with zirconium silicate and alumina, talc improves the brightness of superwhite porcelain tiles.
Used in glazes in combination with calcined alumina, they deliver satin finish with good fusibility and low thermal expansion, and reduce pinholes.
Combined with kaolin in electrical cordierites, talc gives good electrical and thermal shock resistance to cordierite supports for electrical resistors.
In electrical ceramic porcelains, microcrystalline talc is the prime raw material for steatites used in electrical and mechanical applications where it makes up between 65% and 90% of the body.
Imerys talc for ceramics is mined and/or processed at our operations in Canada, United States, France, Belgium, Austria and Australia.
We have major ceramics technology centers in Europe, the Americas and Asia offering a full range of technical and process support services to help you match the right solution to your application requirement.
And with Industrial facilities and blending platforms in Asia, Europe, Middle-East and the Americas, we have the resources to serve our customers anywhere in the world.