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Materials

We manufacture & supply our ceramic crucibles in a number of materials.

Alumina
High purity alumina (Al2O3 content > 99%) ceramics are ideal for high temperature applications (Up to 1,750.C). Re-crystallised alumina is used in crucibles as it offers the best thermal shock resistance due to the larger grain size (up to 200m m is advantageous).

Zirconia
Zirconia (ZrO2) offers three advantages over alumina: it is more refractory, having a melting point some 500oC above alumina. It is readily machined and gives a high quality surface finish and is a useful oxygen anion conductor for use in sensors and fuel cells. However, it is considerably more expensive than alumina.

Pyrolytic Boron Nitride
PBN is an anisotropic, high temperature ceramic, which exhibits a unique combination of high electrical resistance and good thermal conductivity.

Material Properties
The information offered is for comparison only, and is not to be construed as absolute engineering data or constituting a warranty or representation for which we assume legal responsibility.