Molybdenum Disilicide It is an organic compound. The chemical formula for MoSi2 is gray metal solid. Although insoluble in most acids it is soluble in hydrofluoric acid and nitric acid. Both types of atoms have the same radii as well as electronegativity. This is similar to metal or ceramic. Molybdenum Disilicide The surface is electrically conductive and forms a passivation layer made of silicon dioxide at high temperatures. This prevents further oxidation.
It can be used in high-temperature, oxidation-resistant coatings, electric heating elements and integrated electrode films, as well as structural materials, composite reinforcement, wear resistant materials, structural ceramics and other areas of bonding material.
Molybdenum silicicide MoSi2 MoPi2 Powder Physicochemical properties
MoSi2 refers to a type of intermediate phase that has the highest silicon content in Mo-Si’s binary alloy system. This is a Dalton-type intermetallic composition with a fixed structure. It has the dual properties of ceramic and metal, making it a high-temperature material of outstanding performance. High-temperature oxidation resistance and oxidation resistant temperature up to 1600 with SiC equivalent; Moderate densities (6.24g/cm3). Low thermal expansion coefficient (8.10-6K-1); Excellent electric conductivity. Higher brittleness and ductile transition temperatures (1000), below the hardbrittleness of ceramics. It is a metal-like soft material above 1000. MoSi2 is used primarily as a heating element, integrated circuits and high temperature oxidation-resistant coating.
MoSi2 consists of silicon and molybdenum bonded with metal bonds. While silicon and silicon can be bonded by covalent bond, silicon and molybdenum are bonded via metal bonds. Molybdenum disilicide can be described as a gray tetragonal stone. Insoluble in all mineral acids (including aqua-roya), but easily soluble and stable in hydrofluoric or nitric acids mixed acid. It can also be used as an oxidation atmosphere heating element at high temperatures (1700).
An oxidizing atmosphere forms a protective layer on the surface quartz glass (SiO2) that has been heated to high temperatures. This prevents continuous oxidation. SiO2 protective layer is formed when the temperature is greater than 1700. The SiO2 protective coating is thickened at 1710 melting point and fused with SiO2 to create molten drops. Because it has a surface-extending function, it loses some of its protective properties. The protective film is formed again when the element is continuously exposed to the oxidant. Due to the high oxidation at low temperatures, this element can’t be used for extended periods of time at 400-700.
|Molybdenum Silicide MoSi2 Powder Properties|
|Other Names||molybdenum disilicide (MoSi2 Powder)|
|Appearance||From gray to black powder|
|Melting Point||1900-2050 degC|
|Solubility of H2O||N/A|
Molybdenum Siicide MoSi2 Powder Applications
MoSi2 can be found in many heating elements. Heating elements with molybdenum diilicide Can be used at temperatures as high as 1800°C in electric furnaces for production environments in glass, steel and ceramics. These components are not only brittle but can also operate at high power and without aging. Their resistivity doesn’t increase with time.
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