Alumina Al2O3 is the most important oxide-ceramic material and a significant module in our production programme. 
 
      - extreme hardness
      - great to very great strength
      - high to very high thermal conductivity
      - very good insulating properties
      - very resistant to wear
      - very high chemical resistance
      - high to max. refractoriness
 
Mechanically, chemically, thermally, electrically. you look at it. Alumina is simply the tops however.
 
These strengths pre-determine its use, for instance, in trigger insulators, pressure-resistant regulator parts, sliding and seal rings, axles, shafts, bearing shells and aerial shafts.