Product Name: Molybdenum Disilicide (MoSi2) 
Specification: 0.8-10um (D50) 
Appearance: Irregular 
Color: Black Grey 
Features: High melting point (1930-2030 ℃), low density (6.31 g/cm ³), good thermal conductivity, electrical conductivity, and high-temperature oxidation resistance 
Application: High temperature anti-oxidation coating material, electric heating element, integrated electrode film, structural material, reinforcing agent for composite materials, wear-resistant material, connecting material for structural ceramics, and other fields

English name: molybdenum disilicide 
Density: 6.31 
Melting point: 1930 º C 
Molecular formula: MoSi2 
Molecular weight: 152.13100 
Accurate quality: 153.85900 
Appearance: Grey metal 
Preparation principle: MoSi2 can be prepared by direct reaction of Mo+2Si → MoSi2 elements 
Molybdenum disilicide (MoSi2) is a silicon compound of molybdenum, which has properties similar to those of metals and ceramics due to the small difference in atomic radii and similar electronegativity. The melting point is as high as 2030 ℃, and it has conductivity. At high temperatures, a silicon dioxide passivation layer can be formed on the surface to prevent further oxidation. Its appearance is gray metallic color, originating from its tetragonal α - crystal structure, as well as hexagonal but unstable β - modified crystal structure. Insoluble in most acids, but soluble in nitric acid and hydrofluoric acid. MoSi2 is an intermediate phase with a high silicon content in the Mo Si binary alloy system, and is a Dalton type intermetallic compound with a fixed composition. It has the dual characteristics of metal and ceramic, and is an excellent high-temperature material. Excellent high-temperature oxidation resistance, with an oxidation resistance temperature of over 1600 ℃, comparable to SiC; Has a moderate density (6.24g/cm3); Low coefficient of thermal expansion (8.1 × 10-6K-1); Good electrical and thermal conductivity; Below a higher brittle ductile transition temperature (1000 ℃), there is a ceramic like hard brittleness. It exhibits metallic soft plasticity above 1000 ℃. MoSi is mainly used as a heating element, integrated circuit, high-temperature anti-oxidation coating, and high-temperature structural material. In MoSi2, molybdenum and silicon are bonded by metal bonds, while silicon and silicon are bonded by covalent bonds. Molybdenum disilicide is a gray tetragonal crystal. Insoluble in general mineral acids (including aqua regia), but soluble in mixed acids of nitric acid and hydrofluoric acid, it has good high-temperature oxidation resistance and can be used as a heating element working in high-temperature (<1700 ℃) oxidizing atmospheres. In an oxidizing atmosphere, a protective film layer is formed on the surface of high-temperature combustion dense quartz glass (SiO2) to prevent continuous oxidation of molybdenum disilicide. When the temperature of the heating element is above 1700 ℃, a SiO2 protective film is formed, which thickens at a melting point of 1710 ℃ and fuses with SiO2 to form molten droplets. Due to its surface extension, it loses its protective ability. Under the action of oxidants, when elements are continuously used, they form a protective film again. It should be noted that due to strong oxidation at low temperatures, this element cannot be used for a long time in environments with temperatures between 400-700 ℃. 
Molybdenum disilicide is applied in high-temperature anti-oxidation coating materials, electric heating elements, integrated electrode films, structural materials, reinforcing agents for composite materials, wear-resistant materials, connecting materials for structural ceramics, and other fields, distributed in the following industries: 
1) Energy and chemical industry: electric heating elements, high-temperature heat exchangers for atomic reactor devices, gas burners, high-temperature thermocouples and their protective tubes, melting vessels and crucibles (used for melting metals such as sodium, lithium, lead, bismuth, tin, etc.). 
2) Microelectronics industry: MoSi2 and other refractory metal silicides such as Ti5Si3, WSi2, TaSi2 are important candidate materials for gate and interconnect thin films in large-scale integrated circuits. 
3) Aerospace industry: It has been widely and deeply studied and applied as a high-temperature anti-oxidation coating material. Especially as materials for turbine engine components such as blades, impellers, burners, tailpipes, and sealing devices. Molybdenum disilicide, as a structural material, has become a hot topic in the research of intermetallic compound structural materials for high-temperature components, gas burners, nozzles, high-temperature filters, and spark plugs in aviation and automotive gas turbines. The major obstacles in this application are its high room temperature brittleness and low high-temperature strength. Therefore, low-temperature toughening and high-temperature reinforcement of molybdenum disilicide are key technologies for its practical application as structural materials. Research in this area has shown that alloying and compounding are effective means of improving the room temperature toughness and high temperature strength of molybdenum disilicide. The components commonly used for molybdenum disilicide alloying are only a few silicides with the same or similar crystal structure as molybdenum disilicide, such as WSi2, NbSi2, CoSi2, Mo5Si3, and Ti5Si3, among which WSi2 is ideal. However, alloying with WSi2 will significantly lose the advantage of molybdenum disilicide in terms of specific gravity, and its application is limited to a certain extent. Practice has proven that molybdenum disilicide has good chemical stability and capacitance with almost all ceramic reinforcing agents, such as SiC, TiC, ZrO2, Al2O3, TiB2, etc. Therefore, composite preparation of molybdenum disilicide based composite materials is an effective way to improve the mechanical properties of molybdenum disilicide. 
4) Automotive industry: Turbocharger rotors, valve bodies, spark plugs, and engine components for automotive turbochargers. 
Storage method: 
This product should be sealed and stored in a dry and cool environment, and should not be exposed to air for a long time to prevent moisture from causing aggregation, affecting dispersion performance and use effectiveness. In addition, it should be avoided from heavy pressure, and should not come into contact with oxidants. It should be transported as ordinary goods.