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Ultrafine BTO powder may be prepared by APT calcination method. APT Calcination Method to Produce Blue Tungsten Oxide The principle is during heating process, keep positive pressure in furnace to prevent air goes in, and the ammonia generated by APT decomposition can split out hydrogen and nitrogen to keep the mild reducing atmosphere in furnace to obtain the final product – blue tungsten oxide. Besides that, in order to adjust phase composition of product, ammonia gas can be injected in…

Coarse BTO powder may be prepared by APT mild hydrogen reduction method. APT Mild Hydrogen Reduction Method to Produce Blue Tungsten Oxide After loaded on a boat, APT is placed in a multi tube furnace (11 tube electric furnace) and decomposed by heating. Hydrogen is injected into the furnace tube to maintain the reducing atmosphere. The decomposed gas and waste gas are ignited and burned out of the furnace tube. Phase composition of blue tungsten oxide can be adjusted by…

Fine BTO powder itself does not have lubricating property, but it may be applied to produce a new type solid lubricant – tungsten disulfide. Tungsten disulfide (WS2) adopts a layered structure related to molybdenum disulfide (MoS2), with W atoms situated in trigonal prismatic coordination sphere. As lubricant, WS2 has better performance than MoS2, such as larger compressive strength and lower friction coefficient. Tungsten disulfide is dark gray hexagonal crystal with a layered structure. WS2 has two different crystal forms. They…

99.9% blue tungsten oxide has a wide application. There are some main applications as follows. 1. Applied to produce tungsten powder. Blue tungsten oxide is gradually replacing tungstic acid and yellow tungsten oxide for the production of tungsten powder and the manufacturing of downstream products of tungsten such as tungsten wire, tungsten rod, tungsten carbide, and so on. This is because the grain size and grain composition of blue tungsten oxide are easier to be controlled. And therefore it is…

Ultrafine blue tungsten oxide is a blue powder with ultrafine grain size. Blue Tungsten Oxide Calcination The process of preparing blue tungsten oxide by using ammonium paratungstate (APT) as raw material in hydrogen (H2) atmosphere is as follows: APT is placed in the high temperature zone of quartz glass tube. Control temperature, hydrogen flow rate and holding time to produce blue tungsten oxide. To obtain blue tungsten oxide with more cracks and better uniformity, set the parameters as follows: 1.…

Analytical grade blue tungsten oxide may be applied in important analytical experiments and general research. Photoelectron Spectroscopy of Blue Tungsten Oxide Photoelectron spectroscopy was used to study the surface of the valence of blue tungsten oxide. The results show that: 1. The blue tungsten oxide is not a type of tungsten oxide with single valence state, but consists of two valence states, W+5 and W+6. 2. With the temperature rising and the oxygen content decreasing, W6+ tungsten oxide decreases and…

Crystalline blue tungsten oxide is a blue powder with coarser grain size. Ion Exchange Method to Produce Blue Tungsten Oxide This method has been widely used in factory. Ion exchange method to produce blue tungsten oxide has the following process: grinding, leaching, ion exchange, ammonium paratungstate crystallization, drying and calcination. Principle of Blue Tungsten Oxide Prepared by Ion Exchange Method In the aqueous solution of tungsten, different kinds of anions have different affinity for the exchange resin, and the one…

Nano blue tungsten oxide’s testing equipment varies according to different testing methods, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, photoelectron spectroscopy and electron energy analyzer. 1. X-ray diffraction is using X-ray to study the inner microstructure of material. Its basic structure includes high stability X-ray source, sample and sample position orientation adjustment mechanism system, ray detector and diffraction pattern processing analysis system. 2. Scanning Electron Microscope (SEM) is mainly using secondary electron signal imaging to observe the surface…

High density blue tungsten oxide is a blue powder with molecular formula of WO2.90. X-ray Diffraction Method to Measure Phase Composition of WO2.90 in Blue Tungsten Oxide Industrial blue tungsten oxide is a product containing full or partial blue tungsten oxide. It has become an important raw material for producing high-quality tungsten powder. Industrial blue tungsten oxide, in accordance with different production processes, may contain yellow tungsten oxide (WO3) and/or purple tungsten oxide (WO2.72), and even contain trace amounts of…

High-purity ultrafine blue tungsten oxide has properties of large specific surface area, uniform grain size and single phase composition, and can be used as raw materials for producing tungsten wire and many other tungsten products requiring high purity. Inner Reducing Method to Produce Blue Tungsten Oxide Blue tungsten oxide with high purity and large specific surface area will be obtained by reducing W (VI) with the inner composition of tungsten compound. This method usually uses ammonium paratungstate (APT) as raw…