What is tungsten oxide?

The molecular formula of tungsten oxide is WO3 and the molecular weight is 231.85.

It is a tungstic anhydride and a tungstate product. Tungsten oxide includes tungsten trioxide and tungsten dioxide, and there is no tungsten dioxide product in actual industrial production. Tungsten trioxide salt is divided into tungstic acid, sodium tungstate, calcium tungstate, ammonium paratungstate, ammonium metatungstate, etc. according to the content of tungsten trioxide.

Tungsten trioxide is a light yellow triclinic powder crystal. When the temperature is higher than 740℃, it becomes orange tetragonal crystal, which will return to its original shape after cooling. It is stable in the air, with a melting point of 1473°C, a boiling point higher than 1750°C, and a relative density of 7.16.

Tungsten trioxide is the most stable kind of tungsten oxide. Insoluble in water and inorganic acids other than hydrofluoric acid. Dissolved in hot concentrated sodium hydroxide solution and ammonia water to form soluble tungstate. When the temperature is higher than 650°C, H2 can be used to reduce, and C can be reduced at 1000-1100°C to obtain tungsten powder.

Overview of tungsten oxide WO3 powder

Tungsten oxide WO3 is also called tungsten trioxide. Tungsten trioxide is an inorganic substance, chemical formula WO3, is a kind of light yellow crystalline powder. Insoluble in water, soluble in alkali, slightly soluble in acid. Used in the manufacture of high melting point alloys and cemented carbides, tungsten wires and fireproof materials. Tungsten ore and soda ash are co-crystallized and then prepared by adding acid. Tungsten trioxide is a light yellow rhombus crystalline powder. The color changes from light to dark when heated. The specific gravity is 7.16g/cm3, the melting point is 1473°C, the boiling point is 1750°C, and it sublimates significantly at 850°C and turns green when melted. It is stable in air, insoluble in water and inorganic acid except hydrofluoric acid, and slowly dissolves in ammonia and concentrated hot sodium hydroxide solution. The structure of tungsten trioxide depends on the temperature: above 740°C it is tetragonal crystal system, 330-740°C orthorhombic crystal system, 17-330°C monoclinic crystal system, -50-17°C triclinic crystal system . The monoclinic structure is the most common, and its space group is P21/n.

Tungsten has a long history, dating back to the discovery of the 18th century. Peter was the first to recognize the new element of the natural mineral tungsten, originally called tungsten, interpreting its element symbol as the chosen "W". The Swedish chemist Karl Scheelite is also responsible for discovering the mineral scheelite through his research.

In 1841, chemist Robert completed the first process of preparing tungsten trioxide and sodium tungstate. Soon after, his work was patented and he is considered the founder of the tungsten chemical system.

Tungsten trioxide is one of the most stable tungsten oxides. It is insoluble in water. Inorganic acids other than hydrofluoric acid can be dissolved in hot concentrated sodium hydroxide solution and ammonia water to form soluble tungstate. When the temperature is higher than 650℃, it can be reduced with H2, and when the temperature is 1000～1100℃, it can be reduced with C to obtain tungsten powder.

Application of tungsten oxide WO3 powder

Tungsten trioxide has many uses in daily life. It is commonly used in the manufacture of industrial X-ray screen phosphors and tungstate for fireproof fabrics. Because it is rich in yellow elements, tungsten oxide is also used as a pigment in ceramics and paints. In addition, other application examples of tungsten trioxide are as follows:

Tungsten trioxide is mainly used for calcining reduction to produce tungsten powder and tungsten carbide powder, and further used for the production of cemented carbide products, such as the manufacture of tools and molds.

Tungsten trioxide can also be used to make pure tungsten products, tungsten rods, tungsten wires, tungsten electrodes;

And use counterweight and radiation shielding materials.

In industrial production, a small amount is also used as a colorant for yellow ceramics. In the shipbuilding industry, tungsten oxide is used as an important anti-corrosion paint and coating material.

Tungsten trioxide has been used to produce electrochromic windows and smart windows. These windows are electrically switched glass, and the light transmittance and applied voltage change. This allows users to tint their windows through changes in heat or light.

Part of tungsten oxide is used in the production of chemical products, such as paints and coatings, and catalysts for the petroleum industry. But tungsten oxide is an intermediate product. A large amount of tungsten oxide is used in metal tungsten powder and tungsten carbide powder, and then used in the production of metal tungsten products, and a large number of applications and production of tungsten alloy products, into tungsten copper, tungsten nickel, tungsten nickel iron, Tungsten silver, tungsten rhenium, tungsten thorium, etc. The most widely used in contemporary industrial fields are tungsten-based cemented carbide products of various grades and uses.

Tungsten trioxide is also used in ceramic colorants and analytical reagents; used in the production of metallic tungsten materials; gas sensors; fireproof cloth; imaging; large-area display; catalysts; ceramic pigments; humidity sensors; infrared switch cabinets; high-density storage devices; catalysts Temperature sensor; used for X-ray screens and fireproof textiles; tungstate; wastewater treatment; solar energy conversion; production of tungsten carbide, cemented carbide, cutting cooling, superhard molds, tungsten belts, etc. through powder metallurgy.

Tungsten oxide WO3 powder price

The price of tungsten oxide WO3 powder will vary randomly with the production cost, transportation cost, international situation, exchange rate and the demand of market supply and demand. Tanki New Materials Co., Ltd. aims to help all industries and chemical wholesalers find high-quality and low-cost nanomaterials and chemicals by providing turnkey customized manufacturing services. If you are looking for tungsten oxide WO3 powder, please feel free to send the latest price of tungsten oxide WO3 powder.

Tungsten Oxide WO3 Powder Supplier

As a global supplier of tungsten oxide tungsten trioxide powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, structural devices, and can provide OEM services.