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Molybdenum disilicide is often used as a structural ceramic material in electric heating elements

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Update time : 2021-06-02 15:46:05
Introduction to molybdenum disilicide
Molybdenum disilicide is a silicon compound of molybdenum, also known as molybdenum silicide, with a molecular formula of MoSi2 and a molecular weight of 154.13. It is a gray metallic solid. Since the radii of the two kinds of atoms are not much different and the electronegativity is relatively close, they have properties similar to those of metals and ceramics. The melting point is as high as 2030°C, and it is conductive. At high temperatures, a passivation layer of silicon dioxide can be formed on the surface to prevent further oxidation. Its appearance is gray metallic color, which is derived from its tetragonal α-type crystal structure. It also has a hexagonal shape but is unstable. The β-modified crystal structure. Insoluble in most acids, but soluble in nitric acid and hydrofluoric acid.
It is used in high-temperature anti-oxidation coating materials, electric heating elements, integrated electrode films, structural materials, reinforcing agents for composite materials, wear-resistant materials, and connecting materials for structural ceramics.

Application of molybdenum disilicide
It is often used in the fields of high-temperature anti-oxidation coating materials, electric heating elements, integrated electrode films, structural materials, composite materials, reinforcements for composite materials, wear-resistant materials, and connecting materials for structural ceramics. They are 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 protection tubes, smelting vessels and crucibles (used for smelting sodium, lithium, lead, bismuth, tin and other metals).
2. Microelectronics industry: MoSi2 and other refractory metal silicides Ti5Si3, WSi2, TaSi2, etc. are important candidate materials for large-scale integrated circuit gates and interconnection lines.
3. Aerospace industry: As a high-temperature anti-oxidation coating material, it has been widely and in-depth research and application. Especially as a material for turbine engine components, such as blades, impellers, combustors, nozzles and sealing devices.
4. Automobile industry: turbocharger rotors, valve bodies, spark plugs and engine parts for automobiles.

What are the factors that affect the service life of molybdenum disilicide heating elements?
1. Fired products. For example, the service life of firing special glass is different from that used in the reflective material industry and the magnetic material industry. The magnetic material industry has the longest available time and special glass has the least.
2. Product quality. The production of raw materials and manufacturing processes determine the quality of the product.
3. The quality of the stove. A good quality furnace can increase the service life of the components.
4. Surface problems. Long-term use at a temperature of 1800°C will cause problems such as lumps and bubbling on the surface, destroying the protective effect of the SiO2 oxide film on the surface of the silicon molybdenum rod, thereby reducing the service life.
5. Dimensional tolerance. The accuracy of the hot end size will directly affect the precise temperature control of the electric furnace. When there is a tolerance in the diameter, the cross-sectional area and impedance value will also change, and the heat generation of the electric heating component will also change accordingly. This also means that the uniformity of heat in the electric furnace or the service life of the electric heating components will be greatly affected.
6. Furnace operator. Too high power or overheating will damage the heating element products.
7. Product contamination. The product or atmosphere reacts with the protective glaze, causing the component to deteriorate.
8. Insulation problems. The insulating layer is too tight, the insulating layer is displaced and damaged, or the insulator is in contact and overheated.
9. Mechanical force. Thermal breaks will become soft and may deform, depending on the direction of their placement in the furnace.

The price of molybdenum disilicide powder?
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. Currently, our company has successfully developed a series of powder materials. OEM service is available. If you are looking for MoSi2 powder, please contact us. Or click on the needed products to send us an inquiry.

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