By Lzh | 02 February 2023 | 0 Comments
Why molybdenum disilicide is used as a high-temperature anti-corrosion coating material for metals?
What is molybdenum disilicide?
Molybdenum disilicide is insoluble in most acids but soluble in nitric acid and hydrofluoric acid. The two atoms have radii and electronegativity similar to metals and ceramics. Molybdenum disilicide has conductivity, and a silicon dioxide passivation layer can be formed on the surface at high temperatures to prevent further oxidation. It is applied to high-temperature oxidation-resistant coating materials, electric heating elements, integrated electrode films, structural materials, reinforcements of composite materials, wear-resistant materials, and The connection materials of structural ceramics and other fields. As early as 1907, molybdenum disilicide was used as a high-temperature anti-corrosion coating material for metals. In the 1950s, molybdenum disilicide electric heating elements appeared. As a structural material, molybdenum disilicide was first proposed in the early 1950s. But until the 1970s, with the emergence of brittle material as a structural material, it was not taken seriously. In the 1980s, great progress was made, and its research was widely carried out worldwide.
Physical properties of molybdenum disilicide
Molybdenum and silicon in MoSi2 are bound by metal bonds, while covalent bonds bind silicon and silicon. Molybdenum disilicide is a gray tetragonal crystal. It is insoluble in general mineral acids (including aqua regia). However, it is soluble in the mixed acid of nitric acid and hydrofluoric acid and has good high-temperature oxidation resistance. It can be used as a heating element in a high-temperature (<1700 ℃) oxidation atmosphere. In the oxidation atmosphere, a protective film is formed on the surface of high-temperature burning dense quartz glass (SiO2), To prevent continuous oxidation of molybdenum disilicide. When the heating element temperature is higher than 1700 ℃, a SiO2 protective film is formed, fused with SiO2 at the melting point of 1710 ℃ to form a molten drop. Due to the action of its surface extension, its protective ability is lost. Under the action of oxidant, when the elements are used continuously, a protective film is formed again. Due to strong oxidation at low temperatures, This element cannot be used at 400-700 ℃ for a long time.
Application of molybdenum disilicide
Molybdenum disilicide is applied to high-temperature oxidation-resistant 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 of atomic reactor devices, gas burners, high-temperature thermocouples, and their protective tubes, smelting vessels and crucibles (used for smelting sodium, lithium, lead, bismuth, tin, and other metals)
(2) Microelectronics industry: MoSi2 and some other refractory metal silicides, such as Ti5Si3, WSi2, TaSi2, are important candidate materials for LSI gate and interconnect films
(3) Aerospace industry: As a high-temperature oxidation-resistant coating material, it has been widely and deeply studied and applied, especially as a material for turbine engine components, such as blades, impellers, burners, tailpipes, and sealing devices
(4) Automotive industry: Turbocharger rotor, valve body, spark plug, and engine parts for an automobile turbine engine.
Price of molybdenum disilicide
Molybdenum disilicide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of molybdenum disilicide. A large amount of large amount will be lower. The price of molybdenum disilicide can be found on our company's official website.
Molybdenum disilicide supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molybdenum disilicide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective molybdenum disilicide, you are welcome to contact us or inquire at any time.
Molybdenum disilicide is insoluble in most acids but soluble in nitric acid and hydrofluoric acid. The two atoms have radii and electronegativity similar to metals and ceramics. Molybdenum disilicide has conductivity, and a silicon dioxide passivation layer can be formed on the surface at high temperatures to prevent further oxidation. It is applied to high-temperature oxidation-resistant coating materials, electric heating elements, integrated electrode films, structural materials, reinforcements of composite materials, wear-resistant materials, and The connection materials of structural ceramics and other fields. As early as 1907, molybdenum disilicide was used as a high-temperature anti-corrosion coating material for metals. In the 1950s, molybdenum disilicide electric heating elements appeared. As a structural material, molybdenum disilicide was first proposed in the early 1950s. But until the 1970s, with the emergence of brittle material as a structural material, it was not taken seriously. In the 1980s, great progress was made, and its research was widely carried out worldwide.

Molybdenum and silicon in MoSi2 are bound by metal bonds, while covalent bonds bind silicon and silicon. Molybdenum disilicide is a gray tetragonal crystal. It is insoluble in general mineral acids (including aqua regia). However, it is soluble in the mixed acid of nitric acid and hydrofluoric acid and has good high-temperature oxidation resistance. It can be used as a heating element in a high-temperature (<1700 ℃) oxidation atmosphere. In the oxidation atmosphere, a protective film is formed on the surface of high-temperature burning dense quartz glass (SiO2), To prevent continuous oxidation of molybdenum disilicide. When the heating element temperature is higher than 1700 ℃, a SiO2 protective film is formed, fused with SiO2 at the melting point of 1710 ℃ to form a molten drop. Due to the action of its surface extension, its protective ability is lost. Under the action of oxidant, when the elements are used continuously, a protective film is formed again. Due to strong oxidation at low temperatures, This element cannot be used at 400-700 ℃ for a long time.
Application of molybdenum disilicide
Molybdenum disilicide is applied to high-temperature oxidation-resistant 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 of atomic reactor devices, gas burners, high-temperature thermocouples, and their protective tubes, smelting vessels and crucibles (used for smelting sodium, lithium, lead, bismuth, tin, and other metals)
(2) Microelectronics industry: MoSi2 and some other refractory metal silicides, such as Ti5Si3, WSi2, TaSi2, are important candidate materials for LSI gate and interconnect films
(3) Aerospace industry: As a high-temperature oxidation-resistant coating material, it has been widely and deeply studied and applied, especially as a material for turbine engine components, such as blades, impellers, burners, tailpipes, and sealing devices
(4) Automotive industry: Turbocharger rotor, valve body, spark plug, and engine parts for an automobile turbine engine.
Price of molybdenum disilicide
Molybdenum disilicide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of molybdenum disilicide. A large amount of large amount will be lower. The price of molybdenum disilicide can be found on our company's official website.
Molybdenum disilicide supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molybdenum disilicide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective molybdenum disilicide, you are welcome to contact us or inquire at any time.
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