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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
 

 

Market : 
Technical ceramics
Calcined alumina

Aluminas with intermediate to relatively high specific surface areas (BET 3- 75m²/g) with alpha alumina contents varying between 20% and 95%.These are produced by controlled rotary calcination of aluminium trihydroxide.

AR3
Ground calcined alumina

These aluminas are ground in continuous ball-mills or air-jet mills to median particle sizes (d50) 3, 4, 5 or 6 µm.

AC34B3 AC34B4 AC34B5 AC34B6 ACBJ4C
GA4R
Hard calcined alumina

These aluminas have low specific surface area (BET < 1m²/g) and are almost entirely alpha alumina. Standard soda content is 3000-4000 ppm and intermediate soda content is 2000-3000 ppm.  Hard calcined aluminas are produced in rotary kilns.   

AC34
Low soda alumina

This alumina has very low soda content: between 300 and 500ppm. Carefully controlling calcination using the proprietary Reynolds process also allows a wide range of primary crystal size to be offered.  

P112 P122 P152 P162LS P172
P172LS P662 P662F P142
Superground low soda alumina

These low soda aluminas are ball-milled to their primary crystal size, which ranges from 0.4 to 2.5 µm. Soda contents are between 300 and 500ppm.

HPP6 HPP7 P122SB P152SB P162LSB
P172HPB P172LSB P172SDP P662SB
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