Tungsten Oxide Specification
Tungsten oxide specification as following:
Grade |
WO3(%,min) |
Impurities (%,max ) |
|||||||
Al |
As |
Bi |
Ca |
Mg |
Cu |
K |
Na |
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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 ) |
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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) |
Average size(Fess.)u |
Screen size(mesh) 100% |
WO3-1 |
99.95 |
2~2.8 |
7~16 |
-40 |
WO3-2 |
99.5 |
0.6~1.0 |
0.6~1.5 |
|
Related Products:
Ammonium paratungstate (APT) is white crystalline powder, insoluble in water.
Ammonium metatungstate is white powder, soluble in water, solubility is 300g WO3/100ml H2O (in 25℃).
Sodium tungstate is an intermediate tungstate produced from tungsten concentrate, is the raw material for APT.