Ammonium Metatungstate Video
What is Ammonium Metatungstate
Ammonium metatungstate is a white crystalline powder, soluble in water, insoluble in alcohol. It has no harmful components, it has subacidity, often used in the preparation of tungsten products, catalyst in petroleum industry, nuclear shielding material, also ceramic industry, steel alloy, fire resistant fiber and inhibiter. In recent year, it is also used in emerging industry like semiconductor and thin film.
Ammonium Metatungstate Producing Method
Ammonium metatungstate producing method can be divided into two categories of solid and liquid phase transformation, the specific methods are thermal degradation, liquid-liquid extration, ion exchange, electrodialysis, neutralization, acid hydrolysis alcohol precipitation method, etc..
Ammonium Metatungstate Application
Ammonium metatungstate can be used to producing tungsten oxide, catalyst, fiber material, heat insulating masterbatch, etc..
Ammonium Paratungstate Producing Ammonium Metatungstate
Ammonium paratungstate calcinated under 350℃ will generate ammonium metatungstate.
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Purple tungsten oxide phase composition of WO2.72 (or W18O49), which is one of tungsten oxide, abbreviated VTO, is a purple crushed crystalline powder, the color generally purple or blue purple.
Sodium tungstate is mainly used for the preparation of ammonium paratungstate and the depth of preparation of tungsten trioxide, cemented carbide, tungsten, ammonium tungstate, tungstic acid and other tungsten compounds used in petrochemicals, inks and so on.
Ammonium paratungstate is a chemical substance, mainly white crystals, there are two kinds of tablets or acupuncture for the manufacture of tungsten trioxide or blue tungsten oxide metal tungsten powder.
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.
0.6um yellow tungsten oxide, an oxide of tungsten, the appearance of a positive yellow powder, stable at room temperature, the apparent density of 0.6-1.0g / cm3.
Blue Tungsten Oxide refers to a class of dark blue compounds containing a mixed valence state of tungsten (VI) and tungsten (V). The appearance is dark blue powder.
