Precipitation Method Producing Yellow Tungsten Oxide

yellow tungsten oxide photo
yellow tungsten oxide image Inquiry & Feedback

Precipitation method producing yellow tungsten oxide principle is adding proper precipitator in metal salt solution to get ceramic precursor precipitants, dry and calcinate precursor to get nano ceramic powder. Use sodium tungstate and ammonium paratungstate as raw material, add acid to produce tungstic acid, by calcinating tungstic acid to get yellow tungsten oxide, when acidic agent is hydrochloric acid, the reaction equation is as following:
Na2WO4+HCl=NaCl+H2WO4↓
H2WO4=WO3+H2O↑

Sodium tungstate dehydrate is transparent crystalline or white crystalline powder, it will weathering in the dry air, lose crystalline water under 100℃. As raw material of chemical synthesis for tungsten Sodium tungstate is important intermediate material to produce tungsten products, it is mainly used to produce ammonium paratungstate and yellow tungsten oxide, tungsten, tungsten carbide, tungsten wire, tungsten rod, ammonium metatungstate, tungstic acid and other tungsten chemical compounds which are used in petroleum industry, electroplating, textiles, flame retardants, water treatment, dyes, pigments, inks and so on.

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APT

Ammonium Paratungstate

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

Ammonium Metatungstate

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

Sodium Tungstate

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

Tungstic Acid

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.
blue tungsten oxide

Blue Tungsten Oxide

Blue tungsten oxide refers to a class of dark blue compound containing tungsten (Ⅵ) and tungsten (V) mixed valence state. Blue tungsten oxide is the product of reductant and tungsten compounds. Composition of blue tungsten oxide is complex, among which there are also intermediate oxides like WO2 and W4.
cesium tungstate bronze

Cesium Tungsten Bronze

Cesium tungsten bronze is inorganic nano material with good property in absorbing near-infrared with uniform grain size and dispersibility, it has strong absorbing function in near-infrared area with wave length 800~1200nm, also has high transmittance in visible light area with wave length 380~780nm.