Product Mark FTa2O5-1 FTa2O5-2 FTa2O5-3
Main contents (%, ≥) Ta2O5 99.9 99.5 99.0
Impurity 
elemen(%,≤) Nb 0.005 0.02 0.2
Ti 0.001 0.002 0.2
W 0.001 0.003
Mo 0.001 0.002 0.005
Cr 0.001 0.003
Mn 0.001 0.002 0.005
Fe 0.005 0.01 0.03
Ni 0.002 0.005
Cu 0.002 0.005
Al 0.002 0.004 0.01
Si 0.005 0.01 0.0