Talc for ceramics

Shorter cycle and lower firing temperature with our talc additives

Natural mineral talc* is a core additive for all types of ceramics as it improves the vitrification process, allowing you to reduce firing temperatures and shorten firing cycles. 

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, 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, facilitating fast firing and lowering energy consumption and CO₂ emissions.

Combined with zirconium silicate and alumina, talc improves the brightness of super-white porcelain tiles. In glazes, when combined with calcined alumina, talcs deliver satin finish with good fusibility and low thermal expansion, with reduced pinholes.

In automotive applications, talc is the principal ingredient of the honeycomb component of catalyst supports and gasoline/diesel particulate filters, and it can improve electrical resistance when blended with kaolin. 

We mine and process our huge range of talc for ceramics at our operations in France, Belgium, Austria and Australia. Get in touch to discuss which talc-mineral combination can deliver the effects and process improvements that you need.

*Talc products are not available in the USA and Canada. Contact us for an alternative range.