High Purity Tungsten Disulfide WS2 Powder CAS 12138-09-9, 99.9%

Description of Tungsten Disulfide：

Tungsten disulfide is a black solid with excellent hardness and high melting point. It has a high density and is highly stable to heat and radiation. In addition, tungsten disulfide also has good electrical and thermal conductivity.

Tungsten disulfide is insoluble in water and alkali but soluble in acid. It is stable at room temperature but will decompose at more than 500 ° C, producing sulfur and tungsten. This decomposition reaction is reversible, so the decomposition and synthesis of tungsten disulfide can be controlled by heating and cooling.

Tungsten disulfide is also chemically inert and does not react with most chemicals. However, it can react with some metals and metal oxides at high temperatures to form tungsten metal and sulfide.

In addition, tungsten disulfide can react with hydrogen at high temperatures to produce hydrogen sulfide and tungsten. This reaction is also reversible, and the reaction rate and product can be adjusted by controlling the reaction temperature and pressure.

Tungsten disulfide also has a high hardness, so that it can be used as a solid lubricant. It can form a thin film on the metal surface and reduce the coefficient of friction, thus reducing wear and friction resistance. In addition, tungsten disulfide is not easy to decompose at high temperatures, so it can be used in high-temperature environments and does not produce harmful gases at high temperatures.

Tungsten Disulfide details:
 Tungsten Dioxide particle sizes: FSSS=0.4 to 0.7 mm; FSSS=0.85-1.15 mm. 80nm
 Tungsten Disulfide purity: 99.9%

Production Method of Tungsten Disulfide：
The main production methods of tungsten disulfide are an electrochemical method, gas-solid reaction method, and liquid phase reaction method. Among them, the electrochemical method is the most commonly used. The principle is to place the tungsten electrode in a solution containing hydrogen sulfide and hydrogen chloride through electrolysis to produce tungsten disulfide. The benefits of this method include simple operation, easy control, and high product quality, but it has high energy consumption and high production costs.

The gas-solid reaction method is to react with tungsten powder and hydrogen sulfide gas to produce tungsten disulfide. This technique has the benefits of speedy reaction speed, high production efficiency, and low cost, but it needs to use hydrogen sulfide gas, which has safety and environmental problems.

The liquid phase reaction method is the reaction of sodium tungsten and sodium sulfide solution to produce tungsten disulfide. The advantage of this method is that the reaction speed is fast, the production efficiency is high, the cost is low, and the sodium salt is used, which will not produce harmful gases. However, the liquid phase reaction method needs to control the concentration and temperature of the solution. Otherwise, the quality and purity of the product will be affected.

Specifically, the conditions required by the electrochemical method are ① tungsten electrode; ② Electrolyte, using a weakly acidic medium containing S2-; ③ Power supply; ④ elemental tungsten anode and pure sulfur cathode; ⑤ Circulation system and washing system, etc. In this method, the tungsten anode connects to the positive electrode on the power supply and the pure sulfur is connected with the negative electrode of the power supply. The purpose of using a weakly acidic medium is to prevent the anode hole from being blocked by chlorine gas generated by chloride ions during anode discharge. The purpose of leaving the anode in a reducing state is to precipitate tungsten on the anode.

The raw materials of the gas-solid reaction method are ① tungsten powder, ② hydrogen sulfide gas, and ③ Inert gases such as nitrogen or argon. In this process, tungsten disulfide is produced by the reaction of tungsten powder and hydrogen sulfide gas in a high-temperature furnace. The resulting tungsten disulfide is crushed and screened to obtain the product.

The raw materials of the liquid phase reaction method are ① sodium tungstate, Sodium sulfide; ③ Water; ④ Sodium chloride, etc. In this process, sodium tungsten and sodium sulfide are dissolved in Water, and then sodium chloride is added to precipitate to obtain tungsten disulfide precipitation. The residue is cleaned and dried to create the final product.

Application of Tungsten Disulfide WS2:  

Solid lubricants and lubricating oil additives: Tungsten disulfide has excellent lubrication performance and bearing capacity, can effectively reduce friction and wear, and is widely used in petroleum, chemical industry, machinery manufacturing, and other fields. It can form a thin film on the metal surface and reduce the coefficient of friction, thus reducing wear and friction resistance. In addition, tungsten disulfide is not easy to decompose at high temperatures, so it can be used in high-temperature environments and does not produce harmful gases at high temperatures.

Tungstate production: Tungstate is a common tungsten compound with excellent thermal stability, high hardness, good optical and electrical properties, and other characteristics. It is widely used in electronics, ceramics, glass, and other fields. Tungsten disulfide can react with alkali to produce tungstate, such as sodium tungstate, calcium tungstate, etc. These compounds are important industrial raw materials.

Catalyst: Tungsten disulfide can be used as a catalyst, which can effectively catalyze the synthesis of a variety of organic compounds. For example, under the action of a tungsten disulfide catalyst, vinyl acetate can be synthesized from ethylene and acetic acid, and methyl methacrylate can be synthesized from butene and carbon monoxide.

Electronic and photovoltaic materials: Tungsten disulfide has good electronic conductivity and optical properties and can be used as electronic and photovoltaic materials. For example, tungsten disulfide can be prepared into a transparent conductive film for the preparation of solar cells, displays, etc.

Biomedical materials: Tungsten disulfide has certain biocompatibility and bioactivity and can be used as biomedical materials. For example, It can be made as a carrier for drugs to increase the effectiveness of the drug by controlling the rate of release of drugs. Tungsten disulfide can also be used to prepare biomedical devices such as biosensors and biochips.

Superconducting materials: In recent years, research has found that tungsten disulfide has a high superconducting transition temperature and current carrying capacity and can be used as a superconducting material. For example, tungsten disulfide can be prepared into superconducting cables or superconducting magnets for the preparation of superconducting magnets or accelerators in high-energy physics experiments.

Prospect Market of Tungsten Disulfide：

Tungsten disulfide is an inorganic compound with excellent hardness and high melting point, which is widely used in industrial manufacturing and production. With the continual technological and scientific advancement and the constant development of new applications, tungsten disulfide market prospects are very broad.

First, with the development of industrial manufacturing and production, the demand for solid lubricants and lubricant additives is increasing. Tungsten disulfide has excellent lubrication performance and bearing capacity, which can effectively reduce friction and wear, and is widely used in petroleum, the chemical industry, machinery manufacturing, and other fields. With the continuous development of these fields, the demand for tungsten disulfide will also continue to increase.

Secondly, with the continuous development of electronics, ceramics, glass, and other fields, the demand for tungsten compounds such as tungstate is also increasing. Tungstate is a popular tungsten-based compound that is extremely durable, has high thermal stability hardness, as well as excellent electrical and optical properties. It is extensively employed in these areas. Tungsten disulfide can be used as one of the raw materials for the production of tungsten, so its market demand will continue to increase.

In addition, with the continuous development of new energy and environmental protection, the demand for new catalysts and battery materials is also increasing. Tungsten disulfide can be used as a catalyst and battery material, such as a catalyst for fuel cells, electrode materials for solar cells, etc. The development of these areas will also drive the demand for tungsten disulfide to increase.

In addition, with the continuous development of superconducting technology, the demand for superconducting materials is also increasing. Tungsten disulfide can be used as a superconducting material because of its high superconducting transition temperature and current carrying capacity. In the future, the field of applications for superconducting technology is set to grow, and the need for tungsten disulfide is expected to grow.

However, the high production cost of tungsten disulfide limits its application in some fields. In the future, we can find ways to reduce the production cost of tungsten disulfide through further research and development and improve its application potential in more fields. At the same time, with the development of new energy vehicles, renewable energy, and other fields, the demand for efficient and environmentally friendly lubricants and additives is also increasing, which provides new market opportunities for the application of tungsten disulfide.

Tungsten Disulfide Powder Storage Conditions:

The air should be kept out of the reach and control of tungsten dioxide. Dampness could also impact the dispersion of WS2 powder. Use WS2 Powder with caution.

Packing and Shipping Tungsten Disulfide WS2 Pulver:
You can package Tungsten dioxide W2 powder in many different ways depending on its size.
Tungsten Disulfide Powder Packaging: vacuum packing 100g to500g at 1kg/bag  25,5kg/barrel. Other options can be requested
Tungsten diulfide Powder Shipping: After payment receipt received, can ship via sea or air.


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