What is Tungsten Disulfide?

Tungsten disulfide (WS2, Tungsten Disulfide) is a low-dimensional transition metal sulfide with a layered structure similar to that of graphene. It is widely used in optoelectronics, lubrication, and energy storage due to its good mechanical, thermal, optical and electrical reasons. , medical and other fields.

Physical Properties of Tungsten Disulfide:

Appearance is black gray powder, density 7.6g/cm3, slightly soluble in cold water, soluble in hot water, insoluble in inorganic acids, alkalis and alcohols except concentrated nitric acid and hydrofluoric acid mixture, but soluble in molten alkali. Because W in WS2 is in an intermediate valence state, it has strong reducing and oxidizing properties, and is easy to react with hot concentrated sulfuric acid, nitric acid, aqua regia and other strong oxidants to produce WO3 or WS3; in addition, heated to 1250 in vacuum ℃ will decompose into tungsten and sulfur.

Tungsten Disulfide Crystal Structure:

From a microscopic point of view, WS2 is a lamellar hollow sphere with a hexagonal crystal system. S-W-S molecular clusters form a hexagonal network on its surface, and the layers are connected by van der Waals forces and the layers are linked by W-S covalent bonds.

Preparation Method Of Tungsten Disulfide:

1. Roasting decomposition method: First react tungstic acid with ammonia water to generate ammonium tungstate, and then react with hydrogen sulfide gas to generate ammonium tetrathiotungstate, which is roasted at high temperature and decomposed into WS2.

2. Direct synthesis method: WS2 can be formed by passing sulfur vapor into red-hot tungsten.

In addition to the above two methods, there are hydrothermal synthesis method, high temperature solid phase synthesis method and so on.

Tungsten Disulfide Use:

1. As a lubricant, it is suitable for use in places with harsh working environments, mainly because tungsten disulfide has a low coefficient of friction, good compression resistance and oxidation resistance.

2. Used as energy storage electrode material. WS2 can significantly improve the electrochemical performance and safety of electrode materials due to its good electron transport rate and thermochemical stability.

3. It is used as a petroleum catalyst, because it has the characteristics of good cracking performance, stable and reliable catalytic activity, and long service life.

Tungsten Disulfide Packaging:

25kg or 50kg net weight, packed in double-layer polyethylene plastic bags inside, and plastic drums/iron drums as outer packaging; vacuum packaging or other net weight requirements, or the order weight is less than the standard packaging specifications, customized according to the actual situation; conventional packaging is Product name + batch number and other neutral text printing//writing, if you need personalized content, you can also customize.

For more information, please visit: http://tungsten-disulfide.com/

What Is Spherical Tungsten Powder?

Spherical tungsten powder is a kind of metal tungsten powder with spherical powder shape. It is the raw material for preparing tungsten processing materials, tungsten alloys and tungsten products.

Physical and Chemical Properties of Spherical Tungsten Powder:

Appearance is gray-black fine powder, melting point is about 3400 ℃, boiling point is about 5555 ℃, density is 19.3g/cm3 equivalent to gold, hardness is like diamond, reducibility is strong, purity is as high as 99.9%, bulk density is 11.6g/cm3, tapped Density 12.5g/cm3. Under normal circumstances, the higher the degree of spheroidization, the smaller the particle size and the narrower the particle size distribution of the powder, the better the powder flowability and the higher the bulk density.

Production Method of Spherical Tungsten Powder:

1) The product can be obtained by the secondary oxidation and re-reduction technology of tungsten powder.

2) Use the granulation and sintering method to produce spherical powder.

3) It can be prepared by rotating electrode DC arc plasma method.

4) Preparation of large particle powder from tungsten hexafluoride by vapor deposition method.

5) The ordinary tungsten powder is spheroidized and air-cooled with an inductively coupled plasma torch to obtain the product.

Spherical Tungsten Powder Application:

Spherical tungsten powder is the main raw material for the production of tungsten alloy, tungsten material and cemented carbide. W powder can be mixed with other metal powders to make tungsten alloy; W powder can be processed into tungsten materials such as tungsten rods, tungsten wires and tungsten bars; W powder can be made into tungsten carbide powder after carbon treatment, and tungsten carbide powder can be made into Cemented carbide tools such as milling cutters, drills and dies.

Spherical Tungsten Powder Packaging:

25kg or 50kg net weight, packed in double-layer polyethylene plastic bags inside, and plastic drums/iron drums as outer packaging; vacuum packaging or other net weight requirements, or the order weight is less than the standard packaging specifications, customized according to the actual situation; conventional packaging is Product name + batch number and other neutral text printing//writing, if you need personalized content, you can also customize.

For more information, please visit: http://spherical-tungsten-powder.com/

What is Cesium Tungsten Bronze?

Cesium tungsten bronze, also known as cesium tungsten oxide, is an inorganic nanomaterial with good near-infrared absorption effect. 780nm) new functional materials with high transmittance.

English name: Cesium Tungsten Bronze

Molecular formula: Cs0.33WO3

Molecular weight: 276

CAS number: 189619-69-0

Physical and Chemical Properties of Cesium Tungsten Bronze:

The molecular structure of cesium tungsten bronze is oxygen octahedral structure, the purity is higher than 99.9%, the bulk density is 1.5g/ml, the particle size is relatively uniform, the primary particle size is about 30nm, the specific surface area is about 50m2/g, and it is not easy to agglomerate, non-toxic , Non-radioactive features.

The Production Method of Cesium Tungsten Bronze:

Method 1: Preparation of Cs0.33WO3 from Na2WO4•2H2O and Cs2CO3

1. Using sodium tungstate Na2WO4•2H2O as raw material, prepare a sodium tungstate solution with a concentration of 0.5 mol/L.

2. Obtain tungstic acid sol by cation resin exchange, add citric acid (analytical grade) solution with a concentration of 1 mol/L or 2 mol/L and a cesium carbonate Cs2CO3 (analytical grade) solution with a concentration of 0.3 mol/L, and stir evenly , to obtain the precursor for the hydrothermal reaction.

3. Put the precursor solution into the autoclave, react at 190 ℃ for 3 days, and then go through ultrasonic washing, alcohol washing, centrifugation and drying to finally obtain Cs0.33WO3 powder.

Cesium Tungsten Bronze Application:

1. Transparent thermal insulation coatings and films.

2. Thermal insulation chemical fiber, textile fiber and other high-performance thermal insulation media.

3. Transparent heat insulation window film, building coating.

4. Auto film, PVB heat insulation laminated film, laser marking, laser welding, photothermal diagnosis and treatment, infrared filter.

Cesium Tungsten Bronze Packaging:

25kg or 50kg net weight, packed in double-layer polyethylene plastic bags inside, and plastic drums/iron drums as outer packaging; vacuum packaging or other net weight requirements, or the order weight is less than the standard packaging specifications, customized according to the actual situation; conventional packaging is Product name + batch number and other neutral text printing//writing, if you need personalized content, you can also customize.

For more information, please visit: http://cesium-tungsten-bronze.com/

Chinatungsten Online Tungsten Alloy Card Conventional Specifications:

1. Width × Length: (2.0-500.0mm) × (2.0-500.0mm)

2. Thickness: 0.2mm-5.0mm

3. Density: 15.8-18.75 g/cm3

4. Composition: Tungsten content: 85-99%, tungsten-nickel-iron, tungsten-nickel-copper

5. Surface: sintered state, polished surface, polished surface

Tungsten alloy cards are widely used in radiation shielding materials, and can also be used to make bank cards, door cards, business cards, dog tags, etc., which are both decent and delicate and can be preserved forever.

For more information about tungsten alloy products, please visit: tungsten-alloy.com

According to the way of fragment generation, tungsten alloy prefabrication fragment can be divided into three types: natural fragments, pre-controlled fragments and prefabricated fragments. It forms a three-dimensional killing area in space. The shape and size of the three-dimensional killing area is determined by the scattering characteristics of the fragments. The main parameters of fragment scattering characteristics include fragment scattering angle and direction angle, and the distribution variance of the distribution density of fragment numbers along the direction angle.

Whether the fragment can effectively kill the target is closely related to the speed, shape and quality of the fragment hitting the target, and tungsten alloy material can meet this requirement. Chinatungsten Online has been engaged in the production and sales of tungsten alloy fragment rings for more than 20 years, and can provide high-quality products according to customer requirements.

For more information about tungsten alloy products, please visit: tungsten-alloy.com

Tungsten alloy block can be made into weapon parts, molds and counterweights, such as speedboat counterweights, vehicle counterweights, aircraft counterweights, helicopter counterweights, marine counterweights and tank counterweights, etc.

Dies are mainly used for forming techniques in material processing, including pressing the workpiece with the die, thereby reducing the cross-section and increasing the length. Due to its high melting point and good corrosion resistance, tungsten alloy block is the best raw material for making molds.

For more information about tungsten alloy products, please visit: tungsten-alloy.com

Tungsten alloy ring is generally used in industrial counterweights, or shields for medical devices. The thickness of the ring can be as thin as 2mm, but because it is too thin, it is prone to cracking during processing, so the rejection rate is high. The thinner the wall thickness, the higher the price.

For more information about tungsten alloy products, please visit: tungsten-alloy.com

Tungsten alloy medical shielding can be used for collimators, nuclear radiation shields, ray blockers, PET syringe shields, protective canisters, radioisotope containers, DNA (FDG) containers, multi-leaf collimators, etc. .

The advantages of tungsten alloy materials:

1.High radiation mask absorption capacity

2.Under the same radiation mask performance, the tungsten alloy mask is thinner than the lead material

3.Non-toxic, environmentally friendly materials

4.Good machinability

5.Hard and wear-resistant, no need for coating protection

6.Easy to disinfect and sterilize

For more information about tungsten alloy products, please visit: tungsten-alloy.com

Tungsten alloy military sphere has high density and small volume, and can be used in fields that require small and high specific gravity components. Tungsten alloy balls can be used as golf ball weights, fishing sinkers, military tungsten alloy balls can be used for military weights, missile warheads, armor-piercing warheads, shotgun bullets, prefabricated fragments; it can also be used as a counterweight for oil drilling platforms, and some other High-secret areas, such as mobile phone vibrators, balance of pendulum clocks and automatic watches, shock-proof tool holders, flywheel weights, etc.

For more information about tungsten alloy products, please visit: tungsten-alloy.com

Tungsten alloy military cube has excellent properties of high density and high strength, and is an ideal material for military products. The commonly used content is 93%~97% WNIFE, and trace elements are added to improve its crushability, tensile strength and bending strength. . In addition, tungsten alloy is non-toxic and non-polluting, and tungsten alloy military squares are widely used in military fields such as fragmentation rings.

For more information about tungsten alloy products, please visit: tungsten-alloy.com