Product

Product
High-purity Ultrafine Yellow Tungsten Oxide 414

High-purity ultrafine yellow tungsten oxide, or high-purity ultrafine tungsten trioxide is a yellow or light green powder with purity higher than 99.99% and apparent density of 0.28~0.3g/cm3. High-purity ultrafine tungsten trioxide has good catalytic property to be used as a catalyst for petrochemicals. Also, it has good photochromic property and gas sensitivity. Vapor Phase Method to Produce Yellow Tungsten Oxide Generally in the air atmosphere, pressure of the evaporation system is controlled under 133.3~1199.9P, and the tungsten wire is heated…

Product
High-purity High Density Yellow Tungsten Oxide 461

High-purity high density yellow tungsten oxide is a yellow powder with excellent pressing property to prepare tungsten trioxide target with high purity and super high density. The production of high-purity high density tungsten trioxide target should be studied from the aspects of powder, forming and sintering. The optimized combination of the three aspects is necessary to prepare tungsten trioxide target with high purity and high density. The specific research contents include: 1. To produce tungsten trioxide powder with high purity,…

Product
Medium Yellow Tungsten Oxide 443

Medium yellow tungsten oxide or medium tungsten trioxide may be prepared by tungstic acid calcination method, in which tungstic acid is dried and calcined. The tungstic acid calcination method is commonly applied in the industry for producing tungsten trioxide. Tungstic Acid Calcination Method to Produce Yellow Tungsten Oxide It is recorded that tungstic acid is dried under 100℃, mainly by removing moisture absorbed in the product. Ammonia and combined water need to be calcinated under high temperature. Tungstic acid is…

Product
Coarse Yellow Tungsten Oxide 423

Coarse yellow tungsten oxide or coarse tungsten trioxide may be prepared by the ammonium paratungstate – sodium complex salt method. And the coarser the particle size of prepared tungsten trioxide is, the greater the corresponding apparent density is. The Laws of Coarse Tungsten Trioxide Produced by Complex Salt Method 1. The apparent density is greater if the particle size of tungsten trioxide prepared by maintaining the original grain structure of “ammonium paratungstate – sodium complex salt” is coarser. This is…

Product
Fine Yellow Tungsten Oxide 450

Fine yellow tungsten oxide or fine tungsten trioxide is prepared by using double salt method. The finer the granular of yellow tungsten oxide is, the smaller the corresponding apparent density is. Fine WO3 is also produced by the reaction between artificial scheelite and hydrochloric acid (HCL). By using double salt method to produce fine tungsten trioxide, white amorphous gel tungstic acid will be formed first if the double salt and HCL react under cold conditions. And the greater the actual…

Product
Coarse Grain Tungsten Carbide Powder 390

Coarse grain tungsten carbide powder has a spherical appearance, good comprehensive properties such as good fluidity and good wear resistance. It is the important material for preparing the coarse grain tungsten carbide. Characteristic Coarse grain tungsten carbide powder has a spherical appearance, fine acicular eutectic structure inside, microhardness 3200HV, Hall flow rate 6.5s/50g. It has excellent fluidity, good abrasion resistance, etc. Applications Coarse grain tungsten carbide powder is the important material for preparing the coarse grain tungsten carbide. The coarse…

Product
High Density Active Tungsten Powder 440

High density active tungsten powder is a nano-sized tungsten powder prepared by nanometer-scale technology. The sintering activation energy of the powder is greatly reduced, and the sintering activity is improved. It is an important raw material for producing high-density tungsten materials at lower temperatures. Applications High density active tungsten powder is an important raw material for the preparation of high-density tungsten materials, and its particle size basically determines the properties of high-density tungsten materials. The high density activated tungsten powder…

Product
Common Tungsten Carbide Powder 485

Common tungsten carbide powder is a dark gray compound powder composed of tungsten and carbon. The tungsten powder and carbon black are used as raw materials which are mixed into a mixture at a certain ratio. Tungsten carbide powder is chemically stable and has hardness similar to that of diamond. It is a good conductor of electricity and heat, which is often used to produce various kinds of tungsten carbides. Preparation The methods for preparing common tungsten carbide can be…

Product
Spraying Tungsten Carbide Powder 338

Spraying tungsten carbide powder is as an important thermal spraying material with good fluidity and high hardness. Its powder is uniformly spherical. It can meet the requirements of high-performance thermal spraying materials and is widely used in steel industry, petroleum recovery and chemical industry. Characteristic Spraying tungsten carbide powder has good fluidity and high hardness. In addition to the high wear resistance, the formed dense coating also has good corrosion resistance and oxidation resistance. Applications Spraying tungsten carbide powder uses…

Product
Torispherical Cast Tungsten Carbide Powder 384

Torispherical cast tungsten carbide powder has the advantages of good fluidity, good wear resistance and excellent overall performance. The structure is uniform and dense, which is conducive to surfacing and thermal spraying, so that the coating material has excellent performance. Characteristic Torispherical cast tungsten carbide powder is chemically more stable and has higher hardness than ordinary polygonal tungsten carbide powder. Its microstructure is slender equiaxial branches, without hypereutectic and hypoeutectic. When used, there is no stress concentration and microcrack, no…

1 … 178 179 180 181 182 … 201