High-Purity Tungsten Particles

The main function of molybdenum disulfide used in friction materials is to reduce friction at low temperature and increase friction at high temperature, with small loss on ignition and volatile in friction materials. Friction reduction: The particle size of molybdenum disulfide processed by supersonic jet pulverization reaches 325-2500 mesh, the micro-particle hardness is 1-1.5, and the friction coefficient is 0.05-0.1, so it can be used in friction materials to reduce friction; Friction...

Molybdenum disulfide can also become a new material for making transistors. Compared with graphene, which is also a two-dimensional material, molybdenum disulfide has an energy band gap of 1.8 eV, while graphene does not have an energy band gap. Therefore, molybdenum disulfide may have a broad application space in the field of nanotransistors. Moreover, the electron mobility of the single-layer molybdenum disulfide transistor can reach up to about 500 cm^2/(V s), and the current switching rate...

Molybdenum trioxide nanopowder should be stored in a dry, cool and sealed environment, do not expose to the air, and avoid heavy pressure, and transport it as ordinary goods. 1. It is used as a catalyst in the petroleum industry, and also used in the manufacture of molybdenum metal, enamel pigments and pharmaceuticals. 2. In the metallurgical industry, it is used as a raw material for powder metallurgy and in the manufacture of various molybdenum metal materials, and in the chemical industry as...

Molybdenum trioxide nanopowder should be stored in a dry, cool and airtight environment, do not expose to air, avoid heavy pressure, and transport as ordinary goods. 1. It is used as a catalyst in the petroleum industry, and also used in the manufacture of molybdenum metal, enamel pigments and pharmaceuticals. 2. In the metallurgical industry, it is used as the raw material of powder metallurgy and the manufacture of various molybdenum metal materials, and in the chemical industry as the...

Due to the rapid development of molybdenum powder's special properties and applications, it has been widely used in industrial and agricultural fields, such as rubber, plastic, paper, paint, paint, ink, cable, medicine, fertilizer, feed, food, sugar, textile, glass, ceramics , sanitary products, sealants, adhesives, pesticides and pesticide carriers In addition, flue sulfur, water treatment and other environmental protection aspects. The use of lightweight molybdenum powder is different from...

Tungstic acid can exist in various states, mostly yellow powder or crystal. Soluble in hydrofluoric acid, slowly soluble in caustic alkali solution, insoluble in water and other acids. General formula mWO3 · nH2O. There are many kinds of known tungstic acid, all of which are polymer compounds formed by combining tungsten trioxide WO3 with water in different ratios and forms. Known tungstic acid includes yellow tungstic acid, leucic acid, metatungstic acid, etc. Company Profile Jiangsu Leiji...

white tungstic acid Microcrystalline white powder, n:m>1.3, the ratio of n to m varies with preparation and drying conditions. White tungstic acid has significant activity, slightly photosensitivity, easy to reduce. It is prepared by adding sodium tungstate solution dropwise to dilute nitric acid. Decomposing the aqueous tungstate peroxide solution with nitric acid can also obtain powdered tungstic acid, whose activity is worse than that of microcrystalline powdered tungstic acid. White...

A polytungstic acid, colorless crystals. It belongs to 12-tungsten isopolyacids, the simple structural formula is H6[H2(W3O10)4]·nH2O, n is 10 or 23; the density is 3.93g/cm3, decomposes at 50 ℃; the solubility is very large, 88.57 g/100cm3 water (25℃). It is derived from the transformation of metatungstic acid salts. Metatungstate is an important industrial product developed in the late 1970s and is mainly used as a catalyst. Ammonium metatungstate can be obtained from ammonium paratungstate...

Tungsten trioxide is a powder metallurgy raw material for the production of cemented carbide and tungsten products. According to the national standard (GB/T 3457-1998), it is divided into two types, namely tungsten trioxide (referred to as yellow tungsten), the molecular formula is WO3, and blue tungsten oxide (referred to as blue tungsten, which is a mixed tungsten oxide), molecular formula W20O58. Yellow tungsten is light yellow crystalline powder, blue tungsten is dark blue or blue-black...

Tungsten trioxide is a light yellow triclinic powder crystal. When the temperature is higher than 740 ℃, it transforms into an orange tetragonal crystal, and returns to its original state after cooling. It is stable in air, the melting point is 1473℃, the boiling point is higher than 1750℃, and the relative density is 7.16. Tungsten trioxide is the most stable one among tungsten oxides. It is insoluble in water and inorganic acids except hydrofluoric acid. It can be dissolved in hot...

Tungsten oxide has gas sensitivity and is used for the detection of nitrogen dioxide, ammonia and other toxic gases. Tungsten oxide thin film gas sensors and tungsten oxide nanoparticle sensors have been prepared, and the discovery of nanosensors has greatly improved the detection of low-concentration toxic gases Company Profile Jiangsu Leiji Metal Materials Co., Ltd. is a manufacturer of sodium tungstate, tungsten bar, sodium molybdate, ammonium molybdate, molybdenum bar, and other tungsten...

Part of tungsten oxide is used in the production of chemical products, such as paints and coatings, catalysts in the petroleum industry, etc.; but tungsten oxide is an intermediate product, and 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 It is widely used in the production of tungsten alloy products, such as tungsten copper, tungsten nickel, tungsten nickel iron, tungsten silver,...

Ferro-tungsten iron alloy series (tungsten content: 70%-80%) is an alloy composed of tungsten and iron, which is used as an alloy additive for steelmaking. Commonly used ferrotungsten contains 70% tungsten and 80% tungsten. Ferrotungsten is prepared from wolframite by carbon reduction in an electric furnace. Mainly used as alloying element additive for tungsten-containing alloy steel (such as high-speed steel). There are three varieties of ferrotungsten produced in my country, including W701,...

Iron tungsten is smelted by electric furnace. Due to its high melting point, it cannot be released in liquid state, so it is produced by agglomeration method or iron extraction method. Before the 1930s, a small (100-500 kVA) single-phase electric arc furnace was generally used for agglomeration smelting. Later, a three-phase electric furnace was used, and the iron extraction method was developed. There are a large number of tungsten ore in Jiangxi, Hunan and Guangdong in China, and the reserves...

Tungsten is a silver-gray metal. The atomic weight is 183.85. Electronic structure 4f145d46s2. Density (20°C) 19.3g/cm3. Melting point 3400 ℃. Boiling point 5555℃. Tungsten forms solid solution with iron and two intermetallic compounds Fe2W and Fe3W2 or Fe7W6, but both are unstable at high temperature. The melting temperature of ferrotungsten containing W75% to 85% is higher than 2500 ° C, so it cannot be discharged from the furnace, and can only be produced by the accumulation method or the...

Iron alloys mainly composed of tungsten and iron. It also contains impurities such as manganese, silicon, carbon, phosphorus, sulfur, copper, and tin, and is an alloying agent for steelmaking. According to the different tungsten content, ferrotungsten is divided into: FeW75 (including W70%～80%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.5%, Mn≤0.25%) and FeW80 (including W75.0%～85.0%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.7% and Mn≤0.25%). Company Profile Jiangsu Leiji Metal Materials Co., Ltd. is a...

Iron tungsten is smelted by electric furnace. Due to its high melting point, it cannot be released in liquid state, so it is produced by agglomeration method or iron extraction method. Before the 1930s, small (100-500 kVA) single-phase electric arc furnaces were generally used for agglomeration smelting. Later, three-phase electric furnaces were used, and iron extraction methods were developed. There are a large number of tungsten ore in Jiangxi, Hunan and Guangdong in China, and the reserves...

In addition to certain requirements for the impurity content of tungsten powder, the oxygen content should be controlled within a certain range. The particle size of commonly used tungsten powder is generally 2-10 μm in Fisher’s average particle size. The tungsten powder is in the shape of polygonal particles. In addition, the specific surface, bulk density and tap density of tungsten powder also vary within a certain range. The performance of tungsten powder has a direct impact on the...

Tungsten is mostly used in the production of cemented carbide and ferrotungsten. Tungsten and chromium, molybdenum and cobalt form heat-resistant and wear-resistant alloys for making tools, metal surface hardening materials, gas turbine blades and combustion tubes, etc. Tungsten and tantalum, niobium, molybdenum, etc. form refractory alloys. Tungsten copper and tungsten silver alloys are used as electrical contact materials. High-density tungsten-nickel-copper alloy is used as a radiation...

Tungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys. Pure tungsten powder can be made into wire, rod, tube, plate and other processed materials and certain shaped products. Tungsten powder mixed with other metal powders can be made into various tungsten alloys, such as tungsten-molybdenum alloy, tungsten-rhenium alloy, tungsten-copper alloy and high-density tungsten alloy. Another important application of tungsten powder is to make...