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Ultrafine Yellow Tungsten Oxide 320

Ultrafine yellow tungsten oxide is a yellow powder with a large specific surface area, which can be prepared by hydrothermal method. There are three obvious characteristics of hydrothermal method: 1. Accelerate hydrolysis reaction. 2. Accelerate reaction between complex ions. 3. The oxidation-reduction potential of the reactants changed obviously. Hydrothermal Method to Produce Yellow Tungsten Oxide Step one: Weigh a certain ratio of sodium tungstate dehydrate (Na2WO4•2H2O) and sodium chloride into distilled water. The concentration of sodium tungstate in distilled water…

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Optical grade Yellow Tungsten Oxide 323

Optical grade yellow tungsten oxide can be produced by sol-gel method. Sol-gel method adopts ammonium paratungstate (APT) as precursor, adding in ethyl and esters in a certain ratio. After reaction, tungstic acid sol is obtained. After a period of aging process, tungstic acid sol is converted into tungstic acid gel, and then by drying, calcinating tungstic acid to obtain yellow tungsten oxide powder (YTO). Sol-gel method, SG method for short, is a kind of mild producing method of materials. Yellow…

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Crystalline Yellow Tungsten Oxide 334

Crystalline yellow tungsten oxide is the lower specification of tungsten trioxide powder. It can be prepared by hydrothermal synthesis method. Studies have shown that, in the hydrothermal synthesis process, different doses and kinds of assistant agent will have different effects on the morphology and crystalline of yellow tungsten oxide (WO3/YTO). So, what effect does the assistant agent have on WO3? Effect of Different Kinds of Assistant Agents on YTO At the same experimental condition, adding different types of assistant agents…

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Nano Yellow Tungsten Oxide 325

Nano yellow tungsten oxide is nano tungsten trioxide (nano-WO3) that has the characteristics of large specific surface area, high surface energy and strong surface adsorption. It is one of the most promising n-type semiconductor materials following nano-TiO2. WO3 has a low band gap energy and excellent catalytic activity in the visible range of wavelengths below 500 nm. Therefore, WO3 has applications in organic dye degradation and sewage treatment. In addition, WO3 has unique gas sensitivity on various gases, especially those…

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Sodium Paratungstate 180

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 295

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 193

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 275

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 187

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 270

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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