Ceramic Property Comparison

International Syalons offer a range of silicon nitride based sialon, alumina, zirconia and silicon carbide advanced ceramics. These materials will potentially meet your needs in many testing industrial and engineering environments.

In an effort to show how our materials offer a unique set of physical properties, the graphs below compare some properties of our various grades of Syalon, Aluminon, Zircalon and Sycarb with reaction bonded silicon nitride (RBSN) and mullite. (Comparative data comes from technical literature).

Modulus of Rupture

Room temperature modulus of rupture (MPa)

Modulus of rupture at 1000 °C (MPa)

Note RBSN, mullite, Syalon 501 and Zirconia could not be tested at 1000 °C.


Room temperature hardness (Hv50 Kg/mm2)

Fracture Toughness K1C

Fracture Toughness K1C (MPa m½)

Thermal Shock Resistance

Thermal Shock Resistance (ΔT°C quenched in cold water)

Thermal Conductivity

Room Temperature Thermal Conductivity (W/(mK))

Thermal Expansion Coefficient

Room Temperature Thermal Expansion Coefficient (X10-6K-1)


Density (g/cc)