Molybdenum tames the heat.

Confronted with conditions in which traditional metals quickly deform or contaminate the atmosphere as a result of high vapor pressures, molybdenum delivers with a high level of chemical purity, resistance to corrosion and dimensional stability.

Its melting point of 2620 °C makes molybdenum one of the most heat-resistant of all metals. This material has a high thermal stability and creep resistance at operating temperatures of up to 1800 °C and is primarily used in vacuum environments and with nitrogen, hydrogen and noble gases.

Compared with ceramic materials, molybdenum has a lower heat capacity and better thermal conductivity. This means that it can be heated and cooled very rapidly without the risk of cracks forming or deformation.

Its high melting point gives molybdenum a lower vapor pressure than steel and many other construction materials. Molybdenum components thus permit an extremely pure atmosphere within a furnace. Because it represents a graphite-free solution, molybdenum avoids carbon contamination in particular.

Keeping in shape: molybdenum-lanthanum oxide.

 

The fracture toughness of molybdenum materials decreases as the recrystallization level increases. This means that the recrystallization temperature is a decisive factor. We have developed special molybdenum alloys in order to increase the recrystallization temperature and ductility after use under high temperatures. Components from these alloys that are used in furnace construction have a significantly longer service life than pure molybdenum.

Take molybdenum-lanthanum oxide, for example: Small quantities of lanthanum oxide particles coupled with sophisticated rolling technology result in a stacked fibre structure. This special microstructure gives molybdenum-lanthanum oxide a significantly higher recrystallization temperature than molybdenum. Molybdenum-lanthanum oxide is stable to temperatures of up to 2000 °C and retains its creep resistance and dimensional stability even under extreme conditions of use. This material is particularly suitable for manufacturing furnace components such as stranded and other wires, sintering and annealing boats or evaporator coils.

Molybdenum-lanthanum oxide can be processed and formed in the same way as molybdenum. In this way, it is possible to manufacture complex and riveted parts. Unlike pure molybdenum, molybdenum-lanthanum oxide can be machined even after high-temperature treatment. Neither do mechanical cleaning processes such as sandblasting present any problems.

For more than 90 years, we have above all specialized in manufacturing components from molybdenum and tungsten. Our products for high-temperature furnaces include metal hot zones, heating elements, crucibles, shield packs, annealing boats and sintering boats. Learn more about our high resistant metals for your furnace.