Technical Ceramics


Our Haldenwanger® business is pleased to offer their HalCoat™ coating which is used for the protection of fused silica rollers in steel treatment appliances, such as in hot pressing furnaces.

HalCoat™ is made from silicon nitride Si3N4 which repels molten metal, particularly aluminium.

When used as a coating, it significantly extends the operational life of our fused silica rollers, which are otherwise vulnerable to damage from the splashes and drips of molten metal. Like fused silica, it has a very low thermal expansion and excellent resistance to thermal shock.