Mechanical properties Imerys wollastonites - excellent reinforcing agents in traditional ceramic bodies and glazes
Due to their unique acicular structure, Imerys wollastonites are excellent low loss on ignition (LOI) reinforcing agents improving the mechanical properties of ceramic green bodies, engobes and glazes.
Imerys wollastonites are excellent fluxing agents and low LOI replacements for other calcium oxides in traditional ceramics bodies.
Added to green bodies, Imerys wollastonites:
- Increase green and fired body toughness
- Improve impact strength
- Reduce firing shrinkage
- Suppress warpage
- Prevent slumping
Control of particle size and shape is the most important parameter in ceramic bodies. Coarser and more acicular wollastonite grades will be more effective reinforcement agents here.
Used as a fluxing agent in glazes, Imerys wollastonite lowers the effective melting temperature of feldspar by up to 100ºC. This reduces firing costs and yields more durable glazes. Our wollastonites also have a loss on ignition (LOI) typically below 0.5%, meaning minimum CO2 is emitted during firing compared to other materials, improving the strength of the glaze.
Imerys wollastonites are suited for the production of:
- Wall and floor tiles