Altifil™ pyrophyllite products exhibit a lower brightness of 89 and are designed for refractory applications or in applications as a functional mineral filler that are not color sensitive, such as automotive under-the-hood plastics, autobody filler, sealants & adhesives, seed coating, asphalt roofing etc.
Versatility in a bright Hydrous Aluminum Silicate
ALTIFIL™ is a hydrated aluminum silicate mineral produced from Newfoundland deposits of the mineral pyrophyllite with Al2O3 grades ranging from 18% to 24%.
ALTIFIL™ imparts strength to fired ceramic products and can be used in refractory, ceramics, dinnerware and sanitary ware applications. As a valuable refractory raw material we have the following properties:
- Permanent expansion
- Excellent reheat stability
- Low hot load deformation
- Low reversible thermal expansion
- Low thermal conductivity
- High resistance to molten ingress
The permanent expansion is resulted from dehydration between 650 C and 870 C which corresponds generally to the greatest weight loss and the percentage of expansion on the particle size. When exposed to temperatures above 1050 C a transformation to mullite corresponds to significant increases all aspects of mechanical properties – compression strength, flexural strength and hardness.