A strong and thermal shock resisting material for use in molten metals with little wetting or dross build up. Good in molten aluminium or salt baths. Fairly expensive.
Basic Composition: Silicon Nitride, Aluminium Oxide
Temperature Limits: 1000 ° C (1250 ° C in controlled conditions)
Density: 3.26 g/cm³
Coefficient of Expansion: 3.2 x10-6 / ° C
Thermal Conductivity: 16.7 W/m ° C