Sibelco PORTALUM calcined bauxite (aluminium oxide) is produced from Refractory Agglomerated Super Calcined (RASC) bauxite. The main constituent is the mineral corundum.
PORTALUM calcined bauxite can be characterised by:
The addition of PORTALUM enhances abrasion and chemical resistance in coatings, whilst its high hardness and density are valued in abrasive / friction applications such as brake pads.