Tungsten Selenide WSe2 Powder CAS 12024-11-2 99.99%

Tungsten Selenide WSE2 Powder, a grey powder crystal, has 9.32g/cm3. It is the material with the lowest thermal conductivity. Particle Size: Granule, -100mesh
Purity: 99.99%

Description of Tungsten Selenide WSe2 Powder:

Tungsten Selenide, an inorganic compound, is the basis of this article. The Tungsten Selenide Formula chemical is WSe2, with a relative molecular weight of 341.77. This is a gray-colored crystal at room temperature.

Tungsten Selenide's primary structure consists of a single layer of tungsten located in the middle of both the lower and upper selenium atoms. This WSe2 material can absorb light like graphene. The absorbed light can then be used for electric power generation. To obtain two tungsten selenidewse2, stoichiometric and tungsten powders react at 600 - 700°C in vacuum-sealing quartz tunnels.

Two Tungsten selenide uses a hexagonal structure, similar to molybdenum dioxide. Every tungsten element is bound to six selenium ligands through a triangular prism. While each selenium electron is made with three tungsten atomic bonds, every tungsten nucleus is also bonded. The tungsten-selenium's length is 0.2526 inches, and the distance between the selenium molecules is 0.334. This is an example of a well-studied, layered material. Van Dehua accumulates these layers. Van Dehua assembles these layers to form WSe2, a highly stable sixth-race semiconductor transition metal dihalide.

A diode made of two of the tungsten selenide (WSe2) has been developed by researchers at Vienna University of Technology (Vienna University of Technology). The material's ultra-thinness can be achieved, as demonstrated by experiments—solar battery.

The layer, which is thin and lightweight, reflects 95% to 95% light. However, the remaining 5% of light will be absorbed into the material and converted into electricity. The material's internal efficiency is high. The internal efficiency of the system is increased if several thin layers are stacked together. This can make a significant amount of the incident light available. But, this transparency might have some positive side effects. 

Tungsten Selenide Wse2 Powder Properties: Tungsten dielenide is the best thermally insulating metal. A porous material, in general, is the one with the least thermal conductivity.

Tungsten diselenide films have a lower thermal conductivity than single crystals, only one-tenth-thousandth the thermal conductivity of the finest diamond. It has thermal conductivity similar to a porous material. The density of this material is extremely high. Most likely, it is similar to copper.

Production Method of Tungsten Selenide WSe2 Powder：

Direct synthesis

Direct synthesis is a standard production method of tungsten selenide. Tungsten selenide is obtained by the immediate reaction of tungsten and selenium at high temperatures. The specific steps are as follows:

The higher-purity tungsten and selenium elements are prepared; tungsten is usually present in powder form, and selenium is generally in gas or liquid form.

Tungsten powder and selenium elements are placed in a high-temperature furnace and heated to the appropriate temperature (usually 800-1000 ° C).

Keep the temperature high (e.g., several hours) so that the tungsten and selenium entirely react.

After the reaction, the furnace is cooled, and the resulting tungsten selenide is removed.

The advantages of direct synthesis are simple operation and easy availability of raw materials. However, it should be noted that the purity of tungsten selenide obtained by this method may not be high enough, and further purification is needed. In addition, the direct synthesis method has a higher cost and is unsuitable for mass production.

Electrolysis

Electrolysis is a method of preparing compounds by electrolysis of a solution, which can be used to produce high-purity tungsten selenide. The specific steps are as follows:

Dissolve an appropriate amount of tungsten salt (such as ammonium tungsten) and selenium salt (such as selenite) in a solvent (such as water) to obtain a mixed solution.

The mixture is poured into the cell, and a voltage is applied to both electrodes.

During electrolysis, tungsten, and selenium ions are reduced to tungsten and selenium on the anode and deposited on the cathode to form tungsten selenide.

The tungsten selenide deposited on the cathode is collected for cleaning and drying.

The advantage of electrolysis is that high-purity tungsten selenide can be prepared, and the cost is relatively low, suitable for large-scale production. In addition,  tungsten selenide can be controlled by the electrolysis method by adjusting the concentration of solution and electrolytic conditions. However, it should be noted that the electrolysis method requires electrolytic equipment, and the operation is more complicated.

Chemical vapor deposition method

Chemical vapor deposition (CVD) is a commonly used method for preparing compounds, which can convert gas or steam into solid compounds by chemical reaction under certain conditions. This method can be used to produce high-purity tungsten selenide. The specific steps are as follows:

Elements or compounds of tungsten and selenium are introduced into the reaction chamber as gases or vapors.

The reaction chamber is heated to the appropriate temperature (usually between 500-800 ° C) so that tungsten and selenium elemental or compound chemical reaction.

By controlling the reaction conditions (such as temperature, pressure, gas flow, etc.), the reaction products are deposited in the cooler or collector to obtain tungsten selenide crystals.

The advantage of chemical vapor deposition is that high-purity tungsten selenide can be prepared, and the particle size and morphology of tungsten selenide can be controlled by controlling the reaction conditions. In addition, the method can also be carried out at lower temperatures, avoiding the problems caused by high-temperature synthesis. However, it should be noted that chemical vapor deposition requires the use of complex equipment and high-purity raw materials. Hence, the cost is higher, and it is not suitable for large-scale production.

Carbide Manufacturing

Tungsten selenide is an essential additive element in the manufacture of cemented carbide. By adding a certain amount of tungsten selenide in cemented carbide, the life and performance of alloy tools can be significantly improved, the wear rate can be reduced, and the processing efficiency can be improved. Therefore, tungsten selenide has many applications in cemented carbide manufacturing.

Electronic device manufacturing

Tungsten selenide has good electrical conductivity and stability, so it is also widely used in electronic device manufacturing. For example, tungsten selenide can manufacture electrical contacts, electrodes, heating elements, etc. In addition, tungsten selenide can also be used to manufacture high-efficiency solar cells, which have high photoelectric conversion efficiency and long life.

Catalyst field

Tungsten selenide is an excellent catalyst in petroleum cracking, chemical synthesis, environmental protection, and other fields. Because tungsten selenide has high activity and high selectivity, it can significantly improve the rate of chemical reaction and product selectivity. 

Optical field

Tungsten selenide has good optical properties, so it can be used to manufacture optical devices and optical materials. For example, tungsten selenide can be used to manufacture lasers, optical communication devices, optical sensors, etc. In addition, tungsten selenide can also be used to manufacture glass and coating materials with high light transmittance.

Energy sector

Tungsten selenide is also widely used in the field of energy. For example, tungsten selenide can be used to make high-temperature superconducting materials, which have the properties of zero resistance and zero magnetoresistance at high temperatures and can be used to create highly efficient power transmission and power storage systems. In addition, tungsten selenide can also be used to manufacture electrode materials and catalysts for fuel cells.

Biomedical field

Tungsten selenide also has some applications in the biomedical field. For example, tungsten selenide can be used to make medical alloys and biological materials, which have excellent biocompatibility and corrosion resistance and can be used to make artificial joints, dental materials, etc. In addition, tungsten selenide can also be used for drug carriers and drug-controlled release materials.

Tungsten Selenide Wse2 Powder Storage:
Tungsten Selenide Wse2 Powder must be stored in a closed container. Additionally, it should not be subject to extreme stress.

Packing and Shipping Tungsten Seenide WSe2 powder:
Tungsten Selenide Packaging: Vacuum Packing, 1kg/bag and 25kg/barrel or on your Request
Tungsten Selenide shipping: Can be shipped by sea or air as soon as payment receipt is received.

Inquiry us