Tungsten Disulfide Powder

Tungsten Electrode Description

Tungsten disulfide powder (WS2 powder) is dry/solid lubricant powder and is one of the most lubricious substance in world. WS2 offers excellent dry lubricity (COF: 0.03) unmatched to any other substance, including graphite or molybdenum disulfide (MoS2).

Tungsten disulfide powder can be used in high temperature and high-pressure applications. It offers temperature resistance from -270 ° C to 650° C in normal atmosphere and from -188° C to 1316° C in vacuum. Load bearing ability of coated film is extremely high at 300ksi. WS2 powder is a new lubricating material with excellent lubrication performance. The grease added WS2 powder has good performance, such as high dropping point, high oil film strength (PB), and low friction coefficient. It can also be applied to anti-friction material in carbon brush industry, super rigidity material and weld thread), used in aviation, military, etc.

Tungsten disulfide (WS2) can also be used instead of molybdenum disulfide (MoS2).

Since the powder offers one of the lowest coefficient of friction (dynamic @ 0.03 & static @ 0.07), the applications are unlimited and could be tried with every conceivable idea.

Specification of Tungsten Disulfide Powder

Material purity: 99-99.9%, W=73.5~74.3wt%; S=25.82~26.5wt%

Appearance: Gray powder

Particle size: Type 1: F.S.S.S.=0.4~0.7µm; Type 2: F.S.S.S.=0.85~1.15µm;

Packing: Inside: double-fold vacuum package, and outside using metal or fiber drum

We also provide tungsten sulfide Nano powder

Nano Tungsten Sulfide powder:

WS2: ≥99.9wt%

APS: 60nm, 500nm

SSA: >80m2/g

Density: 3.45g/cm3

Volume density: 0.25g/cm3

Appearance: Gray powder

Tungsten Disulfide Powder Applications and Related Industries

● Mixing the WS2 powder with wet lubricants (such as oil, grease & other synthetic lubricants):

The powder can be mixed 1wt% to 15wt% (as required) with grease or oil. This will enhance lubricity of the mixture and also improves the High Temperature and Extreme Pressure properties of the mixture. During the use, WS2 in the mixture will get coated on mating/moving parts, which in turn reduces friction and improves lubricity and the load-bearing ability for much longer cycles.

● Coating the WS2 powder on a substrate requiring (dry) lubricity:

The powder can be coated by spraying (at 120 psi) the substrate with dry (& cool) pneumatic air. It does not require any binders and spraying can be done at normal room temperature. The coated film will be 0.5 microns thick. In an alternative application method, the powder can also be mixed with Isopropyl alcohol and this paste could be buffed to the substrate. The coating applications are already established in many areas such as Automotive parts, Racing Car Engine and other parts, Aerospace parts, Bearings (Linear, Ball, Roller, etc), Shafts, Marine parts, Cutting Tools, Blades, Slitters, Knives, Mold release, Precision Gears, Valve components, Pistons, Chains, Machinery components, and many other areas.

● Research & Laboratory

● Lubrication

● Coating

Chemical Identifiers

Tungsten Disulfide Ultrafine Powder Properties (Theoretical)

Tungsten Disulfide Powder Health & Safety Information