Tungsten dioxide, molecular formula WS2 molecular weight 247.97 It's a grey fine crystal, or powder, with metallic luster. This product is part of the hexagonal system. Purity: 99.9%
Dimensions of partilcles: 70-300nm.

About Tungsten Disulfide WS2:
Tungsten disulfide This inorganic compound is made of tungsten, sulfur, and other elements. Tungsten disulfide chemical formula It is WS2 . This compound forms part of the transition metal dihalides group. The rarest form of tungsten ore is it. This material is part of certain catalysts used for hydrodesulfurization and hydrodenitrogenation.
WS2 tungsten disulfide Uses a layered structure, similar to MoS2 (or the same type) of MoS2, in place of a coordinationsphere with Watoms (instead molybdenum-atoms), in a triangular prism. This layered structure led to the formation of inorganic Nanotubes in WS2 after it was heated in 1992.
Most of the WS2 crystals are dark gray hexagonal with a layered appearance. Similar to its closely related MoS2, it is a dry oil lubricant.
Many people believed that WS2 was stable in ambient oxygen. However, recent studies on single-layer WS2 oxidation within the environment show that the opposite is true. The photooxidation reaction converts WS2 quickly to tungstenoxide in just a single layer. This happens in an environment with ambient light and atmospheric conditions. One-layer WS2 absorbs visible wavelength light (660nm/>1.88eV) and oxidizes it. To proceed with the reaction, you will need water and oxygen. Sulfuric acid and tungsten dioxide are the products of this reaction. Similar results were observed for other semiconductor transitional metal dihalides, such as MoS2, under atmospheric light.
A mixture of hydrofluoric and nitric acids can attack WS2. If heated in oxygen-containing conditions, WS2 will turn to tungsten dioxide. In the absence of oxygen, however, WS2 won't melt and will instead decompose to tungsten trioxide. The decomposition temperature for WS2 is 1250°C.
Separation of monolayer WS2 has been done historically using a chemical exfoliation process. That is inserting lithium (in Hexane) into n-butyl and then removing the Li compound with ultrasonic treatment. Treatment with various agents such as lithium halide or chlorosulfonic acids can help to shed WS2.

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Tungsten Disulfide details:
Tungsten Dioxide particle size: FSSS=0.4 to 0.0.7 mm, and FSSS=0.85 - 1.15 mm. 80nm
Tungsten Disulfide purity: 99.9%

W	S	Al	As	Cl	Cu	Fe	Ni	P	Si	O
74.12	25.82	0.001	0.002	0.03	0.002	0.005	0.002	0.002	0.003	0.002

It is simple. Tungsten Disulfide WS2 produced?
1. Roasting decomposition method:
For 3 hours at 57-60°C stirring the mixture, ammonia is dissolved in water. Heat preservation lasts more than 16 hours. Ammonium tungstate is formed when hydrogen sulfide gases reacts to the generated ammonium. This results in ammonium Tetrathiotungstate, which can be decomposed into tungsten dioxide after high temperature roasting.
H2WO4+2NH3*H2O-(NH4)2WO4+2H2O
(NH4)2WO4+4H2S-(NH4)2WS4+4H2O
2(NH4)2WS4+3O2-2WS2+4NH3+2S+2SO2+H2O
2. Tungsten is very slow to react with liquid sulfur. You can make WS2 by changing sulfur vapor from red hot to tungsten. Mixing tungsten with a stoichiometric sulfur flower is required to create WS2. It can also be react at 600pa or 1800pa to make orthorhombic forms of WS2.
3. By heating the ammonium-tetrathiotungstate and decomposing it, under the condition that the air is isolated, the temperature increases from room to 700 to 1200. After it has been kept at that temperature for 24-48 hours, it's then reduced to room temperatures with a temperature gradient between 30 and 110degC/hour. Next, it is crushed and discharged.
This method for making ultrafine, scaly, tungsten dioxide is simple to use, doesn't pollute the environment and has high-quality, stable, pure tungsten.

Applicaciones Tungsten Disulfide WS2:
Tungsten disulfide This is how you make tungsten disulfide lubricant, tungsten disulfide grease.
Tungsten Disulfide WS2 is an extremely smooth and dry film friction coating. The friction coefficient for WS2 is very low at 0.03, which makes it more efficient than graphite (PTFE), graphite (MoS2), and graphite (MoS2). It has a remarkable performance when it comes to lubricity. You can use it for electronic equipment such as sensors, transistors, and photocatalysis. Tungsten dioxide powder is very soluble in water and alcohol.
Extrusion molds, plastic molds and all other types of demolding use WS2.
Hydraulic oil can no longer be required. Alternatively, it can be combined with synthetic oil, grease and hydraulic oil. It retains fluid layers by having an affinity with them. It keeps oil and grease off the surface. This improves the lubrication.
Tolerable tolerances can be achieved on small parts when the thickness is below 1 micron.
Additionally, WS2 can be used for food processing as well as medical equipment.
WS2 is a high-speed process that replaces customer base material at ambient temperature. This does not cause the substrate to become warped or continuous.
You can use WS2 alone, or with the PVD Hard Coating to increase durability.

Tungsten Disulfide Powder Storage Conditions:
Tungsten Disulfide powder should not be exposed to the air. Damp reunion can affect dispersion performance of WS2 powder and its use. Additionally, WS2 powder must be kept away from stress.

Packing and Shipping Tungsten Disulfide WS2 Pulver:
There are many options for packing depending on how large the Tungsten Dulfide W2 Powder.
Tungsten Disulfide Powder Packaging:vacuum packaging, 100g to 500g or 1kg/bag at 25kg/barrel. Or as you request.
Tungsten Disulfide powder shipping:could ship out by sea or by air as soon as payment receipt is received.


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Tungsten Sulfide Properties
Other Titles	tungsten sulfide (WS2), tungsten disulphide, tungsten(IV) sulfide, WS2 powder
	12138-09-9
Compound Formula	WS2
Molecular Weight	247.97
Appearance	Gray powder to black powder
Melting Point	1250 degC
Boiling Point	N/A
Density	7.5 g/cm3
Solubility of H2O	N/A
Exact Message	247.895074
Tungsten Sulfide Health & Safety Information
Signal word	Alert
Hazard Statements	H315-H319-H335
Hazard Codes	Xi
Risk Codes	36/37/38
Safety statements	26-37/39
Transport Information	N/A

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