Tungsten dioxide, molecular name WS2, has a 247.97 molecular weight. It is a gray powder or fine crystal with metallic luster.
Largest partilcle size is 300-500nm.
About Tungsten Disulfide WS2:
Tungsten dioxideis an organic compound which is made up of tungsten (and sulfur) and . This compound forms part of a family of metals called transition-metal dihalides. It is naturally found as a rare form of tungsten. This material is part of certain catalysts used for hydrodesulfurization and hydrodenitrogenation.
WS2tungsten dioxide utilizes a layered arrangement similar to MoS2/the same MoS2, rather than a coordination field with W (instead Molybdenum and molybdenum molecules) in a triangular prism. The layered structure of WS2 allowed for the formation inorganic hydrocarbons. This was discovered in 1992 after heating a tiny sample.
The bulk of the WS2 consists of dark gray hexagonal and layered crystals. It has similar characteristics to MoS2, a dry-lubricant.
Although WS2 has long been thought to be fairly stable in ambient oxygen, recent investigations on single-layer WS2 oxidation under environmental conditions have revealed that this is far from the truth. A photooxidation reaction converts WS2 quickly to tungstenoxide. The process takes place in a single-layer form. A single-layer of visible wavelength light can be absorbed into WS2 by the oxidation reaction (660nm/>1.88eV). A suitable wavelength light is required in order for the reaction to take place. The water used as a catalyst to oxidize water also needs to be present. You will see the reactions products as tungsten oxide or sulfuric acids. As well, ambient light and atmospheric conditions have been used to witness the oxidation other semiconductor transition metal halides (STMD), like MoS2.
A combination of hydrofluoric Acid and nitric acid also targets WS2. To tungsten dioxide, heat WS2 in an oxygen-containing environment. While WS2 is not able to melt when heated in an oxygen-free atmosphere, it can be reduced into tungsten, sulfur, and decomposed at a temperature of 1250°C.
There was a traditional way to seperate monolayers WS2: by inserting lithium from N-butyl Lithium (in hexane), then stripping the Li compound in ultrasonic heat treated water. Other reagents can be used to get rid of the WS2 such as lithium-halide or chlorosulfonic.
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Tungsten Disulfide details:
Tungsten dioxide particle size: (FSSS =0.4 to 0.7m, 0.85 to 1.15m.
Tungsten Disulfide purity: 99.9%
How is Tungsten Disulfide WS2 produced?
1. Roasting decomposition method:
After 3 hours of stirring ammonia at 57-60°C, tungstic acid reacts with the water. The heat preservation is left to settle for over 16 hours. After high-temperature burning and decomposition, ammonium titanate is created by reacting with hydrogen sulfur gas.
2. Tungsten reacts with liquid sulfur very slowly. Sulfur vapor can be converted to red-hot tungsten to form WS2. Tungsten is mixed to stoichiometrically dissolved sulfur bloom, and heated to 800°C for 24 hour to make WS2, or reacting at 6MPa at 1800°C and 1600°C to produce orthorhombic (WS2)2.
3. By using ammonium titaniotungstate for the raw material and heating it to decompose the ammonium titaniotungstate with the condition of isolating, the temperature rises from ambient temperature to 700-1200. After being at room temperature for 24 to 48 hrs, the temperature drops to room temp with a temperature gradient 30 to110°C/hour. The material then is removed and crushed.
The process of making ultrafine scaled crystal tungsten dioxide used in lubricants is easy to perform, requires no equipment and does not pollute any environment.
Tungsten Disulfide (WS2):
Tungsten disulfide is used to make tungsten disulfide lubricant, tungsten disulfide grease.
Tungsten disulfide-WS2 is a highly smooth friction coated made from dry film. WS2’s friction coefficient is very low (0.03), which is considerably lower than those of graphite and PTFE. It offers superior performance in terms lubricity (non-stick), low friction, wear life, and rated sizes, compared to many other WS2. It is widely used for electronics, such as photocatalysis, transistors, and sensor applications. Tungsten dioxide powder has excellent solubility when mixed with water or ethanol.
For extrusion molding applications, WS2 works well as a release substance for plastic molds.
If you don’t have hydraulic oil to run your hydraulic system, then WS2 will work. It has an affinity for fluid and can maintain that fluid layer. It prevents grease and oil buildup on the surface.
For parts with a thickness less than 1 micron it is possible to coat them without tolerance.
It is also an inert, non-toxic substance that can be used to make medical equipment or food processing products.
High-speed processes at room temperature allow WS2 replacement of customer base materials. It doesn’t make the substrate permanent or warp.
You can mix WS2 and our PVD coating for increased durability.
Tungsten Glufide WS2 Pulp:
Tungsten Disulfide (WS2) Powder will not disperse well if it is subject to dampening. The WS2 powder should never be subject to extreme stress.
Packing & Shipping Tungsten Disulfide WS2 & Powder:
There are many kinds of packing available. It all depends on the Tungsten Sulfide WS2 powder quantity.
Tungstensulfide (WS2) Powder packaging:vacuum pack, 100g 500g or one kg/bag, 25kg/barrel.
Tungsten Disulfide, WS2 powder shipping: Could be shipped via sea, by air, or by express so soon as the payment receipt has been received.
Luoyang Tongrun 15giorni Technology Co. Ltd.
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Tungsten Sulfide Properties
tungsten sulfide (WS2), tungsten disulphide,
tungsten(IV) sulfide, WS2 powder
Tungsten Sulfide Health & Safety Information