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Sodium Paratungstate 197

Sodium paratungstate is a colorless triclinic crystal that has similar structure to ammonium paratungstate composition. Its chemical formula is Na10 (H2W12O42) ?27H2O, molecular weight is 3596.50, and proportion is 3.987 (at 14°C). Characteristics of Sodium Paratungstate 1. It dissolves in cold water. 2. It decomposes in hot water. It begins to lose water if it is heated to 100°C. 3. It is roughly equivalent to 12 aggregation state in solution. Metatungstate is available if continue to add acid to polymerization.…

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0.2~0.6μm Tungsten Carbide Powder 318

0.2~0.6μm tungsten carbide powder has the characteristics of high purity, uniform particle size, good dispersion, which can be made of a new type of tungsten carbide——ultra-fine grain alloys. Characteristic The total content of sodium and potassium in the impurity element is not more than 10ppm, the iron content is not more than 20ppm, the chromium content is not more than 10ppm, and the molybdenum content is not more than 20ppm. The average particle size (FSSS) is controlled within the range…

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Cobalt Tungstate 236

Cobalt tungstate, also called cobalt tungsten oxide, is widely applied as dingal material in antiknock, catalyst, pigment additive and microwave dielectric ceramic. Its formula is CoWO4 and CAS No. is 12640-47-0. Producing Method Adopt sodium tungstate and cobalt chloride as raw materials to prepare nanometer tungstate cobalt powder by using lithium nitrate – sodium nitrate molten salt method. The mass ratio of the molten salt to the cobalt tungstate precursor is 6: 1. React at 210, 270 and 340 °C…

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Tungsten Carbide Self-fluxing Alloy powder 292

Tungsten carbide self-fluxing alloy powder has low oxygen content (about 300ppm), good sphericity, good self-fluxing property, mature powder preparation process, stable coating hardness and high performance, and is widely used in thermal spraying. There are three preparation methods: atomization method, mechanical mixing and sintering methods. The spray welding process of tungsten carbide self-fluxing alloy powder prepared by atomization method has good performance, uniform chemical composition, no macro-segregation, and tungsten carbide is not easily oxidized, but the content of tungsten carbide…

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Cadmium Tungstate 226

Cadmium tungstate is also known as cadmium tungsten oxide or CWO. Its CAS number is 7790-85-4, molecular formula is CdWO4, and molecular weight is 360.25. The cadmium tungsten oxide has a melting point of 1325°C and a density of 7.9g/cm3. The code of safety instructions is 60-61. The hazard code is 20/21/22-50/53. The dangerous mark is Xn, N. And the shipping number of dangerous goods is UN 2570 6.1/PG 3. Application The cadmium tungstate single crystal is a scintillation detector…

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Nickel Based Tungsten Carbide Alloy Powder 288

Nickel based tungsten carbide alloy powder has good stress abrasive wear resistance, good corrosion resistance and high temperature oxidation resistance. It can effectively enhance the wear resistance of the workpiece, and is widely used in civilian applications. Characteristic Nickel based self-fluxing tungsten carbide powder has good sphericity, low oxygen content, and good self-fluxing properties; the sprayed layer has high hardness and uniform microstructure, and the performance is similar to the hybrid type. Applications Nickel based tungsten carbide alloy powder has…

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Torispherical Tungsten Carbide Powder 322

Torispherical tungsten carbide powder has high hardness, density and melting point. It is an important industrial raw material, which is widely used in surface strengthening, abrasive, cutting tool and other industries. Characteristic The shape of the torispherical tungsten carbide powder is a standard sphere, and the surface of the powder particles is smooth and dense. The powder hall liquidity has been greatly improved, and the hardness, density, and melting point are extremely high. These make it more difficult to produce…

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99.5% Tungsten Trioxide 215

99.5% tungsten trioxide can be prepared by complex salt method. Why adopt complex salt method for the preparation of 99.5% WO3? Complex salt method to produce tungsten trioxide powder has the following advantages: 1. Low production costs, significant economic benefits. 2. For producing many types of tungsten trioxide powder, including coarse tungsten trioxide powder, medium tungsten trioxide powder, fine tungsten trioxide powder and ultrafine tungsten trioxide powder. 3. There is no special selectivity to tungsten ore so that it is…

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99.95% Tungsten Trioxide 205

99.95% tungsten trioxide can be prepared by normal temperature extraction – normal temperature reextraction method to obtain ammonium paratungstate (APT) and then heat APT to a certain temperature for tungsten trioxide powder. Producing Method The wolframite is pressure boiled to obtain sodium tungstate solution. After pretreatment, extract active tungsten from the solution with organic reagents (various amines). That means purification and transformation effect are available. The obtained pure tungsten solution is treated by evaporative crystallization to get high-purity APT. Then,…

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99.9% Tungsten Trioxide 193

99.9% tungsten trioxide is a yellow powder that is insoluble in water and soluble in alkali. It can be used to produce tungsten powder. Tungsten Trioxide Hydrogen Reduction Tungsten trioxide hydrogen reduction, a traditional high-volume production technology, is one of the producing methods of tungsten powder. The process is generally divided into two stages: 1. The first stage: Reduce tungsten trioxide to tungsten dioxide under 500~700°C. 2. The second stage: Reduce tungsten dioxide to tungsten powder under 700~900°C. The detailed…

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