Good quality GradeNb2O5Main content, % By substraction(exclusive of F, Ignition Loss)99.5Impurity content(ppm max.)Al0.002Cr0.003Cu0.005F0.1Fe0.02Mn0.005Mo0.003Ni0.02Si0.005Ta0.05Ti0.002W0.003Ignition Loss, %, max0.2ApplicationFor niobium metal billets and powder, niobium carbide, ceramic GradeNb2O5Main content, % By substraction(exclusive of F, Ignition Loss)99.99Impurity content(ppm max.)Al0. ...