Molybdenum Disilicide


Molybdenum disilicide (MoSi2), a refractory metal silicide, is mainly used as a heating element. It has recently been recognized as a potential structural ceramic since it exhibits high elastic modulus and exceptional oxidation resistance at high temperatures. The applications of MoSi2 have been limited as it is naturally brittle below 1000 °C and exhibits weak creep resistance at temperatures over 1200 °C. Therefore, workers have focused on enhancing these properties by mixing MoSi2 with another material in a composite. MoSi2 and related composites are usually prepared through pressure-assisted sintering methods. Hot extrusion and hot pressing create basic shapes and are comparatively cheaper. Hot isostatic pressing creates intricate shapes with even density and grain structures. However, this process is more expensive. Several other approaches are being examined, like mechanical alloying, reaction sintering, and self-propagating high-temperature synthesis. Still, these approaches' commercial viability and reproducibility are yet to be proven. Commercially, MoSi2 is widely used in electric heating elements. The material can be potentially applied in high-temperature structural parts. MoSi2 is a conductive silicide that is oxidation-resistant because of the formation of stable silica layers on its surfaces at high temperatures. MoSi2 has been produced as an electric heating element for use in the air at temperatures beyond 1600 °C. A known commercial MoSi2 heating element is cermet, made by bonding a mixture of MoSi2 particles with an aluminosilicate glass phase, usually as 20% of the total volume. Although top-grade MoSi2 elements can function at temperatures up to 1800 °C, the material is highly brittle and can suffer severely from creep during use. However, they offer process benefits as they can work at high electrical loads without aging and do not exhibit increasing electrical resistivity during use. They are oxidation-resistant in air, oxygen, and oxygen-rich atmospheres. If you are looking for high quality, high purity, and cost-effective Molybdenum disilicide, or if you require the latest price of Molybdenum disilicide, please feel free to email contact mis-asia.

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