Molybdenum Disilicide MoSi2 Powder
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Formula |
MoSi2 |
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Synonyms |
Molybdenum Disilicide, CAS 12136-78-6 |
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Appearance |
Silver Gray Powder |
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Particle Size |
10-60 μm, -100+325 mesh, can be customized upon request |
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Melting Point |
2030 °C |
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Density |
6.26 g/cm 3 |
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Shape |
Spherical, or non-spherical |
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Purity |
99.5% |
Description of Molybdenum Disilicide MoSi2 Powder
Molybdenum disilicide (MoSi2) is a refractory ceramic material known for its high melting point, good electrical conductivity, and exceptional resistance to oxidation at elevated temperatures. It appears as a gray metallic powder and is primarily used in applications such as heating elements, high-temperature coatings, and structural components in extreme environments. MoSi2 is valued for its ability to form a protective silicon dioxide (SiO2) layer when exposed to oxygen, which prevents further oxidation and degradation, making it ideal for use in high-temperature furnaces and other demanding industrial applications. Additionally, its high melting point of around 2,030°C (3,686°F) and good thermal shock resistance make it suitable for thermal protection systems and other high-stress environments.
MoSi2 powder is also known for its good thermal shock resistance and stability, making it suitable for use in harsh environments. These properties make molybdenum disilicide powder an ideal material for applications in high-temperature heating elements, protective coatings, and other components exposed to extreme conditions.
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Chemical Composition
| Product Name | Purity | Shape | Grade | Partcile Size |
| N-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Nanopowder | 5 – 100 nm |
| U-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Ultra Fine | 0.1 – 0.5 um |
| E-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Extremely Fine | 0.5 – 10 um |
| F-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Fine | 10 – 44 um |
| M-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Medium | 44 – 150 um |
| C-MoSi2 | 99% – 99.999% | Spherical, flake, irregular | Coarse | 150 – 250 um |
Applications
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Heating Elements: MoSi2_2 is widely used in heating elements for high-temperature furnaces, kilns, and ovens, where it can operate at temperatures up to 1,800°C (3,272°F) due to its excellent electrical conductivity and oxidation resistance.
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High-Temperature Coatings: It is used as a protective coating for parts exposed to extreme temperatures, such as turbine blades and other aerospace components, to improve their resistance to oxidation and corrosion.
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Structural Materials: MoSi2_2 is utilized in structural materials for high-temperature applications, including ceramic-matrix composites, where its strength and stability at elevated temperatures are essential.
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Catalysis: It serves as a catalyst or catalyst support in chemical reactions that require high thermal stability and resistance to chemical attack.
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Thermal Protection Systems: MoSi2_2 is used in thermal protection systems for aerospace applications, where it helps protect components from heat damage due to its high melting point and ability to form a protective oxide layer.
Molybdenum Disilicide MoSi2 Powder Reference
Phase formation on the sintering of MoSi2 powder by Ni addition
- Molybdenum disilicide has high melting point (approximately 2020°C), low density (6.27 g/cm3) relative to some metals, and excellent high temperature oxidation resistance. Because of its high ductile-brittle transition temperature and low fracture toughness at room temperature 1, 2, 3, 4, 5, 6, 7, 8, 9, however, it is required to be sintered at high temperature to attain full densification [2]. There has been little work performed on the pressureless sintering of MoSi2. Recently, it has been reported that the MoSi2 sintering process is controlled by the diffusion of molybdenum and it needs to be sintered over 1800°C at which the sintered density was more than 90% of theoretical density [10].