What is Sodium Tungstate?

Sodium tungstate is a tungstate of sodium, chemical formula is Na2WO4•2H2O which is prepared from tungsten ores used to manufacture tungsten by reducing.

Application of Sodium Tungstate

It is mainly used as production of tungsten oxides. It is also used as catalyst for epoxidation of alkenes and oxidation of alcohols into aldehydes or ketones.It is also used for treatment of diabetes in animal, in the dye and textile industry,intermediate in preparation of tungsten compounds, fire proofing fabrics & cellulose, alkaloid precipitant.

More details please visit: http://sodium-tungstate.com/english/index.html

What is Nano Yellow Tungsten Oxide?

Yellow tungsten oxide (WO3, Nano Yellow Tungsten Oxide) is an oxide of tungsten with a yellow powder appearance. Two different particles of yellow tungsten oxide are different in size and show different colors. When the crystal size is about 1.5um, it appears yellow; when the crystal size is about 15um, it appears green. Although the appearance is different, the characteristics are similar.

Physical Properties Of Nano Yellow Tungsten Oxide:

Physical properties: yellow or bright green, finely divided yellow crystal powder, loose specific gravity 2.3~2.8g/cm3.

Appearance and characteristics: yellow powder, stable at room temperature, the product passes through 80 mesh screen.

Nano Yellow Tungsten Oxide Application:

1. As an important intermediate in tungsten metallurgy industry, yellow tungsten oxide is widely used in metal tungsten powder and tungsten carbide powder, and then used in the production of metal tungsten products.

2. Part of yellow tungsten oxide is used in the production of chemical products, such as tungstate; due to its rich yellow color, it is used as a pigment for ceramics and paint production; it has catalytic properties and is used in petroleum industry catalysts, etc.

3. Fireproof fabrics and gas sensors for industrial X-ray screen phosphor production.

4. It has semiconductor photocatalytic properties and has been extensively studied as a photocatalyst (photocatalyst).

Nano Yellow Tungsten Oxide 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.

More product details please visit: tungsten-oxide.com

What is Nano Tungstic Acid?

Nano tungstic acid usually refers to nano yellow tungstic acid, an amorphous yellow powder. The properties of tungstic acid in water and acidic solutions are relatively stable, almost insoluble in water, soluble in alkali, slightly soluble in acid, but can react with water. And exist in a certain colloidal form. When tungstic acid is heated to 100°C, it loses a molecule of water and turns into tungsten trioxide. It is almost insoluble in acid, slightly soluble in hot water, and exhibits stable properties at temperatures below 150°C; In strong alkaline solutions, ammonia and hydrofluoric acid.

Chemical formula of nano tungstic acid: H2WO4 or WO3·H2O

Physical Properties Of Nano Tungstic Acid:

Appearance color: light orange-yellow powder, insoluble in water.

Purity: ≥99.9%

Average particle size: 30~50nm

Melting point: 1473℃

Nano Tungstic Acid Application:

Due to its unique properties, tungstic acid was used as the most important and high-purity intermediate compound in the tungsten metallurgical industry in the early days. At present, most of its functions have been replaced by ammonium paratungstate (APT). Raw material of tungsten trioxide; raw material of submicron tungsten powder and some tungsten compounds, used as pigment in yellow glaze, as colorant for yellow ceramics, etc.

Nano Tungstic Acid 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.

More product details please visit: tungstic-acid.com

What Is Purple Tungsten Oxide?

Purple tungsten oxide (WO2.72 or W18O49, Purple Tungsten Oxide or Violet Tungsten Oxide, VTO for short) is a kind of tungsten oxide, which is a purple finely divided crystal powder with a molecular weight of 227.36.

Physical And Chemical Properties Of Purple Tungsten Oxide:

Appearance: purple or blue-purple broken crystal powder

Solubility: Insoluble in water, alcohol and most acids, soluble in ammonia and lye.

Preparation method of purple tungsten oxide:

The preparation of violet tungsten oxide is usually produced by controlling certain reducing conditions using ammonium paratungstate (APT), tungstic acid or tungsten trioxide (WO3) as raw materials. The preparation methods of violet tungsten usually include APT wet hydrogen direct reduction method, hydrogen tungstate reduction method, and APT mild reduction method.

Uses of purple tungsten oxide:

1. Preparation of tungsten powder, especially the preparation of nanometer, submicrometer or ultrafine tungsten powder.

2. Applied to gas sensor, showing good gas sensitivity to nitrogen dioxide at room temperature.

3. Preparation of tungsten carbide powder and ultrafine WC-Co powder.

4. Raw materials for the production of glass thermal insulation coating dispersions.

5. Additives for cathode materials of lithium batteries.

Purple Tungsten Oxide 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.

More product details please visit: violet-tungsten-oxide.com

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/

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 syringe shield 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 cylinder 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