Blue Tungsten Oxide (BTO)

Blue Tungsten Oxide Pirture


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. If the components of blue tungsten oxide are calculated by WO, its W content would be 82.13%. Its W content is much more than WO3. According to the product standard of BTO, the WO3 content should be 99.95%, among which W content is 80.00%~80.80%.

Producing Method

Blue tungsten oxide can be produced by APT calcination method, APT mild hydrogen reduction method, inner reducing method and ion exchange method.

Chemical Specification

Grade:A WO2.8-2.97 Content(%min):99.95
Density: 2.4-2.8g/cm3 Grain Size:12-19um
Element Al As Bi Ca Cd Cr Co Cu Fe K Mg Mn
MAX 0.0005 0.0010 0.0001 0.0010 0.0001 0.0010 0.0010 0.0003 0.0010 0.0010 0.0007 0.0010
Element Mo Na Ni P Pb S Sb Si Sn Ti V /
MAX 0.0020 0.0010 0.0007 0.0007 0.0001 0.0007 0.0005 0.0010 0.0002 0.0010 0.0010 /