Highland’s process produces Silicon Nitride (Si3N4) Silicon nitride can readily be deployed in some of the world’s toughest working environments, due to its unique intersection of chemical and thermodynamic properties. The chemical integrity of Si3N4 makes is suitable for surfaces that come into contact with abrasive slurries and corrosive fluids. Hot pressed silicon nitride offers excellent high-temperature performance and is ideal for seal face components challenging conditions, including boiler water reaction pumps, pressurized water reactor pumps, corrosive borated water service and within rotating bearings.