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

More 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. Due to its layered structure, WS2 produced inorganic Nanotubes in 1992 after heat treating a small amount of WS2.
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.
It has been believed that WS2 can be stable in ambient oxygen. But, recent studies on single-layer WS2 oxidation within the environment show that the opposite is true. Photooxidation reactions are quick enough to transform WS2 in to tungsten olefin in just a few hours in the atmosphere and ambient light. 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-rich 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 degC.
The traditional method of seperating monolayers WS2 involved a chemical exfoliation process. That is, inserting lithium into n-butyl lignin (in hexane) and then removing the Li compound using ultrasonic water 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, stir ammonia with 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 passing sulfur gas to red hottungsten. Mixing stoichiometric sulfur with tungsten is a good way to make WS2. For example, react at 600pa or 1800degC to create orthorhombic W2.
3. By heating the ammonium-tetrathiotungstate and decomposing it, under the condition that the air is isolated, the temperature increases from room to 700-1200. The material is chilled for up to 24 hours before being brought back to room temperature.
This method for making ultrafine, scaly, tungsten dioxide is simple to use, doesn’t pollute the environment, produces high-quality tungsten, with high purity and a hexagonal crystal structure.

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. WS2 has an extremely low friction coefficient, 0.03, which is significantly lower than that of graphite (PTFE), molybdenum sulfide(MoS2), and graphite (graphite). 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 and other molding applications require WS2 as a release material.
Hydraulic oil can no longer be required. WS2 can work with any type of oil such as grease, hydraulic oil or silicone, and can even be combined with 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.
The WS2 hard coating can be combined with PVD 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:
We offer many packing options that are dependent on the Tungsten Dulfide Powder amount.
Tungsten Disulfide Powder Packaging:vacuum packaging, 100g to 500g, 1kg/bag or 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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