High Purity Tungsten Silicide WSi2 Powder CAS 12039-88-2, 99%

Tungsten silicide (also known as tungsten diilicide) is an organic silicide. Tungsten Silicide is dark gray powder. Tungsten Silicide is used in the manufacture of anti-oxidation and resistance wire compressed. Purity: 99%
Particle Size : 5-10um

About Tungsten Silicide WSi2 Powder :

Structure of tungsten silicide

Tungsten silicide is a chemically bonded compound in which tungsten and silicon atoms form a chemical bond by sharing electrons. This compound has a specific crystal structure in which tungsten atoms form a hexagonal close-packed structure, while silicon atoms fill the voids created by tungsten atoms. This structure makes tungsten silicide have a high hardness and melting point.

The nature of tungsten silicide

Physical properties: Tungsten silicide is a hard alloy with high hardness, high melting point, and good electrical and thermal conductivity. Its density is more significant, about equal to the thickness of tungsten, but its melting point is much higher than tungsten. In addition, tungsten silicide also has good wear resistance and oxidation resistance.

Chemical properties: Tungsten silicide has high chemical stability and cannot readily react with acids, bases, and other substances. However, at high temperatures, tungsten silicide may undergo oxidation reactions, releasing oxides of silicon and tungsten.

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Characteristics of Tungsten Siicide WSi2:
Tungsten Silicide WSi2 Powder (CAS 12039-82-0) has a melting point of 900°C, a high resistance to corrosion, oxidation and good electrical conductivity.
A binary alloy system is the intermediate phase. It has high-temperature ductility as well as conductivity.

Technical Parameters of Tungsten Silicate WSi2 powder:
Product Name MF Purity Particle Size Melting Point Density Color
tungsten silicide WSi2 99% 5-10um 2165 9.4 g/cm3 Black

Chemical Composition Tungsten Silicate WSi2 powder:
WSi2 The following are some of the most effective ways to get in touch with each other Si C P Fe S
>99% >76.1% balance 0.01% 0.02% 0.20% 0.004%

Production Method of Tungsten Silicide WSi2 Powder :

High-temperature reduction process

The high-temperature reduction method is commonly used to prepare tungsten silicide, which is to reduce tungsten and silicon oxides or halides at high temperatures to prepare tungsten silicide. The specific steps are as follows:

Tungsten and silicon oxides or halides are mixed proportionately to make raw materials.

The raw material is put into a high-temperature reduction furnace, and the reduction reaction is carried out at a high temperature of about 1500℃ or more.

During the reaction, oxygen or halogen gas is consumed to form tungsten silicide and other by-products.

The resulting tungsten silicide is removed from the furnace for cooling and grinding.

The stoichiometric ratio and physical properties of tungsten silicide can be adjusted by controlling the raw material ratio, reaction temperature, and time.

Chemical vapor deposition method

Chemical vapor deposition (CVD) is a commonly used method for preparing inorganic compounds. The technique is to pass gaseous chemical raw materials through the reaction chamber at high temperatures and deposit the required compounds on the substrate. The specific steps are as follows:

At high temperatures, silane and tungsten chloride undergo a chemical reaction to produce tungsten silicide deposited on the substrate.

The deposited substrate is removed for cooling and processing.

Production process conditions and control factors

In the process of producing tungsten silicide, it is necessary to strictly control the production process conditions and control factors to ensure the quality and stability of the product. These factors include purity and proportion of the raw material, reaction temperature and time, atmosphere pressure and composition, deposition rate and thickness, etc. By precisely controlling these factors, tungsten silicide products with excellent properties can be obtained.

Application of Tungsten Silicide WSi2 Powder :

Electronics and semiconductors

Tungsten silicide is widely used in the field of electronics and semiconductors. Due to its high melting point and excellent electrical conductivity, tungsten silicide is an electrode material for high-temperature, high-power electronic devices. In addition, tungsten silicide is also used to manufacture masks and barrier layers in semiconductor devices and as a high-temperature and corrosion-resistant coating material in semiconductor processing.

Photovoltaic field

Tungsten silicide also has essential applications in the field of photovoltaics. Due to its high hardness and good chemical stability, tungsten silicide is a light-reflecting coating material for solar panels. In addition, tungsten silicide can also be used as a window material in solar panels to improve the efficiency and stability of the battery.


Tungsten silicide is also widely used in the aerospace field. Due to its high melting point, high hardness, good chemical stability, and excellent electrical conductivity, tungsten silicide is used as a high-temperature protective coating material for aerospace spacecraft and the manufacture of electronic devices and components under high temperature and high-pressure conditions.

The automotive field

Tungsten silicide is also widely used in the automotive field. Tungsten silicide is used as a wear-resistant coating material for automotive parts, as well as for the manufacture of electronic devices and components under high temperature and high-pressure conditions.

Tool field

Tungsten silicide is also widely used in the field of cutting tools. Tungsten silicide is used as a tool coating material for manufacturing cutting and drilling tools, which can significantly improve the cutting efficiency and life of the instrument.

The field of high-temperature stoves

Tungsten silicide is also widely used in the field of high-temperature stoves. Due to its high melting point, high hardness, good chemical stability, and excellent electrical conductivity, tungsten silicide is used as a heating element and refractory material for high-temperature stoves, which can improve the service life and safety of stoves.

Packing & Shipping of Tungsten Silicide WSi2 Powder:
We have many different kinds of packing which depend on the tungsten silicide WSi2 powder quantity.
Tungsten silicide WSi2 powder packing: vacuum packing, 1kg/bag, 25kg/barrel, or as your request.
Tungsten silicide WSi2 powder shipping: could be shipped out by sea, by air, by express as soon as possible once payment receipt.

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Tungsten Silicide Properties

Other Names tungsten disilicide, WSi2 powder
CAS No. 12039-88-2
Compound Formula WSi2
Molecular Weight 240.01
Appearance Gray Black Powder
Melting Point 2160
Boiling Point N/A
Density 9.3 g/cm3
Solubility in H2O N/A
Exact Mass 239.904786

Tungsten Silicide Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
Transport Information N/A

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