Alumina with its AL2O3 content of more 80% to more than 99% is technically the most important oxide ceramic material. It is characterised by
This material is more or less employed in all field of application because of its many properties and combination of properties and because of its good price-performance ratio. You will find it being used in
For more detailed examples, see the alphabetical application list.
This material is mostly produced as high-grade, so called unary ceramic, in porous or gas-tight form. Special characteristics are
Magnesium oxide is used
Zirconia occurs in monoclinic, tetragonal and cubic crystal modifications and is produced as fully stabilised (FSZ), partially stabilised (TSZ) or tetragonal zirconia, depending on the dotage amount.
Zirconias have acquired a new significance in the last years due to their excellent tribiological properties,
Due to these properties zirconia ceramics are preferred for
The oxygen ion conductivity is used for reading oxygen partial pressures e.g.
A stoichiometric composed phase of alumina and titania. The material convinces trough
Aluminium titanate is used for example as
Today the most important piezoelectrical ceramic materials are based on the oxide mixed crystals system lead zirconate and lead titanate. The properties depend on the molar proportions (lead zirconate to lead titanate), as well as substitutions and dotage through additional elements. Piezo ceramics are able to set an electrical charge free during mechanical distortion or lead, due to the direct piezo-electrical effect. If an inverse piezoelectrical effect takes place, then there is a change of dimension through an electrical field. Items there are possibilities for materials with very different specifications, for example
Further, more detailed information to this in the Breviary