SiAlON is an alloy of silicon nitride and aluminium oxide. This superior refractory material has the combined properties of silicon nitride (high strength, hardness, fracture toughness, and low thermal expansion) and aluminium oxide (corrosion resistance, chemically inert, high temperature capabilities, and oxidation resistance).

Typical applications are thermocouple sheaths, Degassing and injector tubes and burner tubes.Next to Mullite and SiAlON we also have other special ceramics such as, zirconia.