Blue Tungsten Oxide SEM Micrograph
Blue tungsten oxide is a kind of deep blue compounds containing tungsten(Ⅵ) and tungsten(V). Blue tungsten oxide in industry means a mixture of WO2.72, WO2.90, W20O58 and (NH4)х•WO3. Among of them, (NH4)х•WO3 is ammonium metatungstate(ATB), a non stoichiometric compound. Blue tungsten oxide, which is mainly based on ATB and WO2.90, is not only a good raw material for the production of tungsten materials, but also for tungsten heavy alloy and other tungsten products.
Scanning electron microscope (SEM) is a kind of scanning equipment used for micrograph by multiplying objects, which can be metal, powder, etc. From the following SEM micrographs, different phase components of blue tungsten oxide have different SEM micrographs.
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Ammonium paratungstate (APT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, insoluble in water, soluble in alcohol and ether.
Ammonium metatungstate(AMT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, solubility in water is the largest in the tungsten compounds which over 300g WO3/100ml H2O (in 25℃).
Sodium tungstate, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores used to manufacture tungsten by reducing it.
Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3.H2O, the dihydrate WO3.2H2O is also known. The solid state structure of WO3. H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.
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