Blue Tungsten Oxide Solubleness
Blue tungsten oxide is acidic oxide. It can’t be soluble in water, slightly soluble in acid. Blue tungsten oxide can react with alkali to form the corresponding soluble tungstate, so blue tungsten oxide can be soluble in alkali.
Solubleness is the degree to which a substance can be dissolved. If a solute is dissolved in a solvent well, we say that the substance is soluble. If it is not much dissolved, it is said that the substance is slightly soluble. If it is difficult to dissolve, then it is said that this material is insoluble or difficult to dissolve. In a certain temperature, the solubility of a solid substance in the 100g solvent to reach saturation state is the quality of the dissolved.
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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.
Yellow tungsten oxide is a finely divided, yellow crystalline powder. It is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off water and ammonia. Exact time and temperature control determine, to a large extent, the physical characteristics of yellow tungsten oxide.
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.