molybdenum disilicide heating elements are a refractory ceramic material with high resistance to corrosion and oxidation. They can be used up to furnace temperatures of 1800degC and are commonly used in industrial furnaces, oxidizing furnaces, ceramic firing, sintering, glass melting, and other heat treatment applications.
The MoSi2 material is a dense cermet material, with the surface being coated with a layer of quartz (SiO2) to protect it from oxidation. This layer is renewed as the element temperature rises.
This allows the element to maintain its electrical resistivity at a constant temperature over its lifetime. This means that new and old elements can be installed together or in series, even in a single furnace.
They can withstand a high degree of oxidation and have very long service life. They are also available in many shapes and sizes, including spiral, U and W, multiple shanks, and custom designs.
Unlike silicon carbide heating elements, molybdenum disilicide heating elements have a passivation layer of silicon dioxide that prevents further oxidation by oxygen in the atmosphere. This makes them ideal for use in environments that have a low oxygen content, such as those found in hydrogen atmospheres.
American Elements manufactures a complete line of high-density, corrosion-resistant molybdenum disilicide (Moly-D) heating elements for use in industrial furnaces, oxidizing furnaces, sintering, glass melting, metal melting and sputtering, and other heat treatment applications. These elements can be used up to a maximum element temperature of 1800degC in oxidizing atmospheres and have the ability to support power densities on their surface up to 20W/cm2, making them a great choice for many heat treatment applications.