Tungsten Oxide

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Tungsten Bronze 293

Tungsten bronze is a type of non-stoichiometric compound with formula of MxWO3, where M is usually alkali metal, alkaline earth metal, ammonium ion and rare earth metal ion, etc; and 0< x< 1. The change in the types of M and the value of x make MxWO3 having conductor or semiconductor properties. Tungsten Bronze Properties 1. Usually cubic crystal or tetragonal crystal. 2. Color varies with the change of x value, from golden yellow to light blue gray. 3. All…

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Potassium Cesium Tungsten Bronze 565

Potassium cesium tungsten bronze has formula of KxCSyWOz, where x+y≤1 and 2≤z≤3. If the particles of KxCSyWOz are nano particles. The particles are useful as near-infrared (OTR) absorbers and/or heat shielding additive (may be prepared by a plasma torch). And the additive may be applied in organic or inorganic substrates, such as plastics, paints, enamels, inks, adhesives, ceramic or glass. The potassium cesium tungsten bronze particles exhibit properties of a solid solution. I.e., they are uniform and present in a…

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High-purity Cesium Tungsten Bronze Nanopowder 568

High-purity cesium tungsten bronze nanopowder may be prepared by solvothermal liquid phase method in a 1500L reactor. Before that, there has been no report on the production of cesium tungsten bronze nanopowder by completely liquid phase method. Many studies have reported that wet chemical liquid phase methods, such as hydrothermal method, solvothermal method and high-temperature pyrolysis method may be used to prepare cesium tungsten bronze nanoparticles. However, they all have the disadvantages of high costs, serious corrosion to equipment, high…

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Nano Grain Size Cesium Tungsten Bronze 513

Nano grain size cesium tungsten bronze can absorb infrared light so that it can realize transparent heat insulation. And it has the best absorption on near-infrared rays among antimony-doped tin oxide (ATO), indium tin oxide (ITO), lanthanum hexaboride, and cesium tungsten bronze nanoparticles. How to apply nano grain size cesium tungsten bronze to thermal insulation materials? 1. Add cesium tungsten bronze nanoparticles with the ability of absorbing infrared light into the resin to obtain transparent thermal insulation coating and coat…

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Cesium Tungsten Bronze Powder 524

Cesium tungsten bronze powder may be used as transparent material with heat-insulating performance, which has wide application prospects in the field of automotive glass and window glass of building for thermal insulation. It is also energy saving. Preparation of Cesium Tungsten Bronze Powder 1. Prepare sodium tungstate solution with a concentration of 0.5mol/L using AR sodium tungstate (Na2WO4?2H2O) as raw material, and obtain tungstic acid sol by cationic resin exchange, then add AR citric acid at a concentration of 1mol/L…

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Cesium Tungsten Bronze Nanopowder 509

Cesium tungsten bronze nanopowder may absorb infrared rays and may be used for preparing transparent heat insulation coating. Preparation of Cesium Tungsten Bronze Nanopowder 400kg of sorbitol was heated and dissolved in a jacketed reactor and tungstic acid and cesium sulfate were added. The mass ratio of tungstic acid and cesium sulfate was 1:0.33. The mass of sorbitol was 3 times the total mass of tungstic acid and cesium sulfate. Stir at high speed for 30min, and pump into a…

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Doping Ammonium Metatungstate 497

Doping ammonium metatungstate may be applied as a raw material for producing tungsten products with special ding. For example, potassium doped ammonium metatungstate may be used to prepare K-doped tungsten powder, which can be used for preparing tungsten filaments. Generally, doping AMT is referred as to white crystalline powder obtained by doping other elements in AMT in the liquid phase process. Nano Grain Size Tungsten Powder Prepared by Arsenic-doped Ammonium Metatungstate 1. AMT is added to nitric acid solution with…

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Ammonium Metatungstate Hydrate 540

Ammonium metatungstate hydrate is the hydrate of AMT with CAS No. of 12333-11-8, molecular formula of (NH4)6H2W12O40?xH2O, and molecular weight of 2974.3. Its WO3 content is determined to be 99.0%. Its total impurity is less than or equal to 0.005% water-insoluble substance. Ammonium Metatungstate Hydrate Properties 1. Melting point is 100°C (dec.) (lit.); 2. It is soluble in water and its solubility in water is 0.1g/mL. The solution is clear and colorless. Ammonium Metatungstate Hydrate Applications 1. Used as a…

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High-purity Ammonium Metatungstate Crystal 521

High-purity ammonium metatungstate crystal may be prepared by neutralization-nanofiltration-crystallization coupling process. Among them, the coupling process of neutralization-nanofiltration was studied to know the effects of temperature, pH value, stirring rate, and membrane pressure on the coupling process. The neutralization-nanofiltration coupling process includes acid neutralization process to prepare AMT mixed solution and nanofiltration process of AMT mixed solution. Neutralization-nanofiltration Coupling Process to Study Preparation Conditions of High-purity Ammonium Metatungstate Crystal 1. Test Materials and Devices (1) Ammonium paratungstate (APT-0); (2) Nitric…

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Industrial Grade Ammonium Metatungstate 511

Industrial grade ammonium metatungstate is ammonium metatungstate of very high purity. The determination of bismuth (Bi) in AMT may be feasible by coprecipitation-hydride generation-atomic fluorescence spectrometry. A Method for the Determination of Bismuth in AMT by Coprecipitation-hydride Generation-atomic Fluorescence Spectrometry 1. Instrument AFS-830 dual channel atomic fluorescence spectrometer; bismuth high intensity hollow cathode lamp. 2. Reagents (1) Standard stock solution: 1,000 μg/mL; (2) Bismuth standard solution: 100ng/mL; (3) Reducing agent: 20g/L KBH-5g/L KOH mixed solution, which is freshly prepared just…

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