Tungsten Trioxide Specifications
Tungsten trioxide specifications as following:
| Grade | WO3(%,min) | Impurities (%,max ) | |||||||
| Al | As | Bi | Ca | Mg | Cu | K | Na | ||
| WO3-1 | 99.95 | 0.0005 | 0.001 | 0.0001 | 0.0015 | 0.0005 | 0.0003 | 0.001 | 0.001 |
| WO3-2 | 99.5 | 0.0015 | 0.01 | -- | 0.01 | 0.01 | -- | 0.005 | 0.005 |
| Impurities(%,max ) | ||||||||||
| Fe | Mn | Mo | Ni | P | Pb | S | Sb | Si | Sn | Ti |
| 0.001 | 0.0005 | 0.002 | 0.0007 | 0.0007 | 0.0001 | 0.0007 | 0.0003 | 0.001 | 0.0001 | 0.001 |
| 0.04 | -- | 0.03 | -- | 0.004 | -- | 0.006 | -- | 0.005 | -- | -- |
| Grade | WO3 (%,min ) | Apparent Density(g/cm3) | Fess((Fsss.)u | 目数(mesh) 100% |
| WO3-1 | 99.95 | 2~2.8 | 7~16 | -40 |
| WO3-2 | 99.5 | 0.6~1.0 | 0.6~1.5 |
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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℃).
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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 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.