Alumina

Alumina (Aluminum Oxide Al2O3) is the most important oxide-ceramic material and an important component in our manufacturing program. This material is made from synthetic raw materials. Alumina content of our material is 80 - 99 % depending on the purity of the raw materials. Alumina is fired at 1,600° to 1,750° C. Components made of aluminum oxide can be glazed to obtain dirt repellent surfaces.

Outstanding properties in accordance with DIN VDE 0035/ DIN EN 60 672 are:

  • Excellent hardness
  • High to maximum strength
  • High to very high thermal conductivity
  • Very good insulating properties
  • Excellent resistance  to wear
  • Very high chemical resistance
  • Good thermal shock resistance
  • High to maximum refractoriness
  • Our injection molding process allows the manufacture of complex components made of alumina

Mechanical, chemical, thermal and electrical properties make alumina the ideal material for any application.

These excellent properties make it ideally suited for use in ignition insulators, pressure-resistant controller components, sliding and sealing rings, axles, shafts, bearing shells and antenna shafts.

Advanced alumina: A100 variant

We have successfully developed a new ceramic material - A100 enhances the outstanding properties of alumina when it comes to hardness and wear resistance.

A100, the new C799 high-performance ceramic, is based on an optimized method for the preparation of raw material and a special polishing technique is used to finish the surface of manufactured parts. Raw material preparation produces an extremely fine-grade powder with a D50 value significantly below 1 µm and high purity that is used as source material.

The Al2O3 content of A100 is higher than 99.97 % and allows very high density close to the theoretical density of 3.99 g/cm³ resulting in better hardness and strength properties. Components made of A100 feature perfect, non-porous surfaces due to high material density and special polishing. A100 is ideally suited for passive and active components in textile machines exposed to high stresses from wear.

Comparison C799 Standard and A100 

A comparison of the ceramic structure, polished surfaces ofC799 Standard/C799 A100