White fused alumina

Porous ceramics


This type of ceramic, which can contain more than 99% alumina, builds in porosity to parts that make them ideal for supporting catalysts or as filters. After preparation, usually by spray drying, the material is shaped then fired at temperatures in excess of 1500°C. Shrinkage is carefully controlled and the part exhibits the same characteristics as a densified ceramic: high mechanical strength and hardness with resistance to wear and chemical corrosion and excellent thermal and electrical resistance properties. But, careful control of the alumina particle size distribution enables porosity to be created. The pore size and volume maximizing the available surface area for a given volume. Also often important for these ceramics is consistent control of the alumina chemistry as impurities can interfere with catalyst reactions and also need to be minimized for food and medical applications.  Examples of porous ceramic applications:
  • Bed filtration
    • Foam filters for liquid metal
    • Ultrafiltation membranes for the food and medicine industry
  • Catalyst support
    • Catalyst exhaust gas filters and diesel particulate trap filters for the automotive industry
    • Catalyst carriers e.g. petrochemicals and environmental industries 


Bricks and shaped materials

Refractories are construction materials designed to withstand aggressive service conditions at high temperature. Refractory materials are used as heat-resistant walls, coatings or linings to protect units from oxidation, corrosion, erosion and heat damage. Industries that need refractories include: steel, non-ferrous metals, glass, power, cement, petrochemicals and waste incineration. Refractory products can be divided into the following types: Bricks and shaped materials, monolithic materials and insulating materials.


Bricks and shaped materials – prefabricated shapes including bricks for linings, kiln furniture and functional products such as slide gates for steel flow control.



Surface treatment operation that consists in impacting the surface with free abrasive particles from a high-pressure air or water stream.


Coated abrasives

A layer of abrasive grains are basically glued onto a flexible support (paper or cloth). A base coat (generally phenolic resin) ensures the proper attachment of the grains to the support, while a size coat (on the grains themselves) is used to hold them in place during the grinding operation. Various shapes of tools can be found, like belts, discs, flap wheels, paper and so on.


Laminated flooring

To improve the wear resistance of laminated flooring, specially treated white fused alumina grains can be dispersed in a transparent resin layer covering a decorative paper. The products are especially suited to high resistance laminate flooring without loss of transparency, even with very dark colours.


Bonded abrasives

The abrasive particles are incorporated into a bond (either vitrified or resinoïd). This mix is then pressed and cured to form grinding wheels of various sizes and shapes or other grinding tools (like rods and stones).