Molybdenum diilicide MoSi2 a type intermediate phase with the highest level of silicon in Mo-Si binaural alloy system. It is a Dalton intermetallic compound of fixed composition. It has both the characteristics of ceramic and metal, and is an excellent material for high temperatures. MoSi2 exhibits good resistance to oxidation at high temperature. The oxidation temperature can reach 1600. This is very similar to SiC. It is medium in density (6.24g/cm3) with a low thermal expansion (8.1 x 10–6 K-1), good electrical conductivity, ceramic-like hardness, and brittleness at temperatures below the higher, brittle-ductile, transition temperature (1000). It exhibits a soft plasticity that is metal-like above 1000. MoSi2 can be used as a heating element or integrated circuit. It also has high temperature oxidation resistance coatings and high-temperature structural material.

MoSi2 contains silicon and molybdenum bonded with metal bonds. In MoSi2, silicon and silicon can be connected by covalent bond. Molybdenum disilicide, a gray, tetragonal crystal, is also present. It is insoluble with most mineral acids (including aqua regia), but it is soluble in a mixture between nitric and hydrofluoric acids. It has a high oxidation resistance and can be used to heat in an oxygen atmosphere at high temperature (1700).

Why is Molybdenum diilicide used?

Molybdenum diicide is used for high temperature antioxidation coatings, electric heating elements, integrated electro films, structural materials. Specifically:

Energy chemical industry: Electric heating elements, high heat exchangers of nuclear reactor devices, gas burners. High temperature thermocouples with their protective tubes. Melting vessel crucibles (for melting tin, sodium, bismuth and lead).

Industries in microelectronics: MoSi2 is an important candidate material for large-scale interconnect and gate films for large-scale integrated Circuits.

Aerospace industry: The application and research into high temperature antioxidation coating materials has been extensive. It is used as a material for components of turbine engines such as blades. impellers. burners. tail nozzles. sealing devices.

Automotive industry: engine parts, turbochargers, valve bodies and spark plugs.

What restrictions does MoSi2 impose?

MoSi2 is very soft at temperatures below 1000°C. This means it will become plastic at higher temperatures.

It is also susceptible to creeping at temperatures exceeding 1200 degrees Celsius.

Molybdenum disilicide MoSi2 MoSi2 Powder price

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