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Blue Tungsten Oxide
Appearance: Dark blue or bluish block crystallized powder
Phase Composition: W20O58≥70%
Apparent Density: 2.2~2.9g/cm3
Application: Raw material for hydrogenolysis tungsten powder, used for producing doped tungsten powder, tungsten bar, tungsten rod, tungsten wire and W-base high density alloy.

Grade and Chemical Composition:
Grade TBO-0 TBO-1 TBO-2
Purity Min. (%) 99.98 99.95 99.90
Content of Other Chemical
Element Max. (%)		 Al 0.0005 0.001 0.001
As 0.001 0.001 0.002
Bi 0.0001 0.0001 0.0005
Ca 0.001 0.001 0.003
Co 0.001 0.001 0.002
Cr 0.001 0.001 0.001
Cu 0.0003 0.0005 0.001
Fe 0.001 0.001 0.003
K 0.001 0.0015 0.002
Mg 0.0005 0.001 0.002
Mn 0.0005 0.001 0.001
Mo 0.002 0.005 0.02
Na 0.001 0.0015 0.003
Ni 0.0005 0.0007 0.001
P 0.0005 0.001 0.003
Pb 0.0001 0.0001 0.0005
S 0.0005 0.001 0.001
Sb 0.0005 0.001 0.002
Si 0.001 0.001 0.003
Sn 0.0001 0.0005 0.0005
Ti 0.001 0.001 0.002
V 0.001 0.001 0.002