Background

McDanel Advanced Ceramic Technologies LLC is a leading manufacturer of high quality refractory tubes and sheaths, supplying major heat-using industries worldwide for over 80 years.

They offer high purity alumina, mullite and partially stabilized zirconia tubing. The impervious fine grained ceramic products are used in many applications where it is necessary to provide a protective atmosphere at high temperatures without contamination. Material selection depends upon operating working conditions such as peak temperature, chemical environment and abruptness of temperature change.

Various rods, tubes, crucibles, dishes, boats, trays and discs are standard items and a significant capability for producing custom shapes is available.
SiAlON Material
McDanel Advanced Ceramic Technologies LLC SiAlON ST is an alloy of silicon nitride and aluminum oxide. This superior refractory material has the combined properties of silicon nitride (high strength, hardness, fracture toughness and low thermal expansion) and aluminum oxide (corrosion resistance, refractoriness and oxidation resistance). Traditional refractory products can be used only in high temperature applications where one or two of the following properties are required: thermal shock resistance, mechanical strength, corrosion resistance, abrasion resistance or electrical insulation. McDanel Advanced Ceramic Technologies LLC SiAlON ST combines high levels of these properties in one refractory material.
SiAlON ST is uniquely qualified for non-ferrous molten metal applications and high wear or high stress environments up to 1250°C. SiAlON ST is non-wetting for most non-ferrous metals. It is gas-tight, chemically inert, resistant to corrosion and features high strength, hardness and thermal shock resistance.