Fine hydrate


Alumina functions in pigments:
  • Precipitated micronic alumina trihydrate isused with cobalt to obtain the colour blue.
  • Soft calcined alumina is used with manganese to obtain the colour red




The Aluminium ion takes the place of the Si ion in the crystalline network. This enables the make up of the glaze to be varied without modifying the mechanical properties.


Advanced Ceramics


Ceramic components containing up to almost 100% alumina are made by firing a preprepared and shaped “green” part at temperatures in excess of 1500°C. By carefully controlling the intrinsic shrinkage that takes place, the highly densified product offers high mechanical strength and hardness with resistance to wear and chemical corrosion. Additionally, alumina ceramics exhibit very favourable thermal and electrical resistance properties. The applications that benefit from these characteristics include:
  • Chemical resistance
    • ​Semi-conductor substrates
    • Solar panels
    • Medical & food ceramics


  • Shock resistance
    • Ballistics protection
  • Voltage insulation
    • Porcelain based high voltage insulators
    • Spark plugs
    • Dielectric engineering ceramics
    • Electronic substrates
  • Thermal insulation
    • Substrates for high-frequency chips
    • Kiln furniture such as rollers