Product Name: Tungsten Disilicide (WSi2)
Specification: 0.8-10um (D50)
Appearance: Irregular
Color: Black Grey
Features: high melting point, high hardness, good conductivity, thermal stability, and oxidation resistance
Application: Microelectronics, electronic devices, energy storage, catalysts and other fields
TUNGSTEN SILICIDE
CAS number: 12039-88-2
Molecular formula: WSi2
Molecular weight: 240.01
EINECS number: 234-909-0
Melting point: 2165 ° C
Density: 9.88 g/cm3
Solubility: Insoluble in water
Resistance: 33.4 (ρ/μ Ω. cm)
Water solubility: Insoluble in water
Physical and chemical properties: Tungsten silicide is a odorless black gray tetragonal crystal that is insoluble in water and aqua regia, but soluble in a mixture of nitric acid and hydrofluoric acid.
Preparation method:
(1) Mix tungsten powder and silicon powder in a ratio of 1:2, and titanium powder and graphite powder in a ratio of 1:1, and then mix them evenly.
(2) Place the W-Si mixed powder in the center of the crucible, evenly place the Ti-C mixed powder between the W-Si mixed powder and the crucible, and finally place a layer of Ti-C mixed powder on top of all mixed powders. The weight ratio of Ti mixed powder to W-Si mixed powder in the crucible is (0.8~1.2): 1
(3) Place the crucible containing the mixed powder into a sealed reactor, evacuate and fill it with argon gas, and then use a tungsten wire to initiate a reaction between the mixed materials.
Purpose:
1. Tungsten disilicide can be used to manufacture ultra-high temperature heating elements, providing a stable high-temperature environment for material sintering, melting and other processes in high-temperature furnaces
Detailed explanation: Tungsten disilicide has a high melting point and good high-temperature stability, which can maintain structural and performance stability under ultra-high temperature conditions. As a heating element, it can continuously and efficiently generate heat, meeting the strict temperature requirements of high-temperature furnaces.
2. It can be applied to the hot end components of engines in the aerospace field, enhancing the high temperature resistance and oxidation resistance of components, and ensuring the reliable operation of engines under extreme working conditions.
Detailed explanation: The working environment of the hot end components of aerospace engines is extremely harsh. The excellent high-temperature performance and oxidation resistance of tungsten disilicide can effectively improve the service life and performance of the components, ensuring the safe and stable operation of the engine.
3. Tungsten disilicide is used to prepare protective sleeves for high-temperature thermocouples, preventing damage to the thermocouples in high-temperature and highly corrosive environments and ensuring the accuracy of temperature measurement.
Detailed explanation: When measuring high temperatures, the protective sleeve of a high-temperature thermocouple needs to have properties such as high temperature resistance and corrosion resistance. The protective sleeve made of tungsten disilicide can effectively resist the erosion of harsh environments, enabling thermocouples to accurately measure temperature.
4. It can be used as a heat dissipation material for integrated circuits in the electronics industry, quickly dissipating the heat generated by the chip and maintaining its normal operating temperature. Detailed explanation: With the continuous improvement of integrated circuit performance, the heat generated by chips is increasing. Tungsten disilicide has good thermal conductivity and can efficiently conduct heat, playing a role in heat dissipation and avoiding performance degradation or damage to chips due to overheating.
5. Tungsten disilicide is used to manufacture coatings for cutting tools, improving their hardness, wear resistance, and cutting performance, and extending their service life.
Detailed explanation: During the cutting process, the tool needs to withstand high pressure and high friction. Tungsten disilicide coating can increase the hardness and wear resistance of the tool surface, reduce tool wear, thereby improving machining efficiency and quality, and extending the tool's service life.
In the field of chemical engineering, it can be used to manufacture corrosion-resistant reactor liners that resist the erosion of corrosive media such as strong acids and alkalis, ensuring the smooth progress of reactions.
Detailed explanation: Various corrosive substances are often used in chemical reactions, and tungsten disilicide has good chemical stability. As the lining of the reaction vessel, it can prevent the corrosion of the reaction vessel body by the medium, ensuring the safety and stability of the reaction.
7. It can be applied to sensitive components of high-temperature sensors to accurately measure and monitor physical quantities such as temperature and pressure. Detailed explanation: The physical properties of tungsten disilicide change with changes in physical quantities such as temperature and pressure. This characteristic can be used to make sensitive components for high-temperature sensors, enabling accurate measurement and real-time monitoring of physical quantities in high-temperature environments.
Packaging and storage: This product is packaged in an inert gas filled plastic bag, sealed and stored in a dry and cool environment. It should not be exposed to air to prevent moisture from causing oxidation and aggregation, which may affect dispersion performance and usage effectiveness; The packaging quantity can be provided in separate packages according to customer requirements.
