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Xi'an Zhiyue Material Tech. Co., Ltd.
Xi'an Zhiyue Material Tech. Co., Ltd.

Molybdenum Disilicide Powder (MoSi2)

Molybdenum disilicate is an inorganic compound that appears as a gray metallic solid and has properties similar to those of metals and ceramics. It has excellent conductivity and high-temperature stability, and can form a silicon dioxide passivation layer at high temperatures, effectively preventing further oxidation. Molybdenum disilicide has a very high melting point, around 2030 degrees Celsius, and is insoluble in most acids, but soluble in nitric acid and hydrofluoric acid. Due to these unique physical and chemical properties, molybdenum disilicide has been widely used in various fields, such as high-temperature antioxidant coating materials, electric heating elements, integrated electrode films, structural materials, reinforcing agents for composite materials, wear-resistant materials, and connecting materials for structural ceramics. It plays an irreplaceable role in the energy and chemical industry, microelectronics industry, aerospace industry, and automotive industry, and is an indispensable and important material in modern industrial and technological development.


purity:>99.9% P

article size: -325 mesh

CAS: 12136-78-6

  • molybdenum disilicide mosi2
  • molybdenum disilicide mosi2

Advantages of Molybdenum Disilicide Powder (MoSi₂)

1

Exceptional High-Temperature Oxidation Resistance

MoSi₂ stands out among refractory compounds for its excellent oxidation resistance at elevated temperatures—up to 1800°C in air. This is primarily due to the formation of a dense, self-healing layer of silicon dioxide (SiO₂) on the surface, which protects the underlying material from further oxidation. This property makes MoSi₂ powder particularly valuable for structural and coating applications in extreme thermal environments, such as heating elements in high-temperature furnaces and aerospace engine components.

2

Superior Thermal Shock and Mechanical Stability

Molybdenum disilicide possesses a rare combination of high melting point (~2030°C) and good thermal shock resistance, making it an excellent candidate for environments with rapid temperature fluctuations. Unlike many ceramics that crack under thermal cycling, MoSi₂ retains structural integrity due to its moderate coefficient of thermal expansion and tough grain structure. These properties are especially beneficial in metal heat treatment, sintering furnaces, and high-temperature reactors.

3

High Electrical Conductivity for Heating Elements

MoSi₂ is electrically conductive and maintains relatively stable resistivity across a wide temperature range, which makes it one of the most effective materials for electrical heating elements used in oxidizing environments above 1200°C. Its low degradation rate extends operational life and reduces maintenance costs in industrial heating systems. This electrical conductivity also enables MoSi₂ to be used in specialized electronic applications such as thermoelectric devices and interconnect materials.

4

Compatibility with Composite and Coating Systems

Thanks to its chemical compatibility and sinterability, MoSi₂ powder is frequently used in combination with other materials such as alumina (Al₂O₃), zirconia (ZrO₂), or silicon carbide (SiC) to enhance composite properties. In thin-film and thermal spray coatings, it is utilized for oxidation protection, emissivity control, and to improve wear resistance on components exposed to corrosive or erosive media. Its ability to form dense, adherent coatings further supports its role in surface engineering.

5

Corrosion Resistance in Aggressive Environments

MoSi₂ exhibits strong resistance not only to oxidation but also to certain corrosive gases and molten metals. This makes it an attractive material for components exposed to hydrogen, chlorine, and alkali vapors, or for crucibles and liners in molten metal processing. Its resilience reduces the risk of contamination and extends service life in critical chemical processing applications.

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