Profile: International Syalons (Newcastle) Ltd specializes in manufacturing sialon and silicon nitride based ceramic products & powders. We manufacture a range of silicon nitride and sialon advanced ceramic thermocouple protection sheaths for use in the aluminium and molten metal handling industries. They are an advanced ceramic tube offering outstanding performance for temperature control in aluminium foundries and smelters. We provide ceramic impellers which are used in the chemical & process industries often for mixing or stirring highly corrosive chemicals and abrasive slurries.