Description
Physical properties:
white powdery crystals, the color becomes light yellow when oxygen defects appear in the crystal lattice, it is an amphoteric oxide, hardly soluble in water, slightly soluble in hydrofluoric acid, hardly soluble in inorganic acids other than hydrofluoric acid, Soluble in molten NaOH, KOH, K2S2O7, KHSO4.
Packing:
double-layer plastic packaging in outer iron drum, or inner aluminum foil bag and outer carton packaging.
Chemical composition: Industrial grade niobium pentoxide implements industry standard YS/T428-2000.
Impurities element | Impurity content (%, ≤) | ||
FNb2O5 -1 | FNb2O5 -2 | FNb2O5 -3 | |
Ta | 0.03 | 0.08 | 0.3 |
Ti | 0.001 | 0.002 | 0.005 |
W | 0.003 | 0.005 | 0.01 |
Mo | 0.002 | 0.003 | – |
Cr | 0.002 | 0.003 | – |
Mn | 0.002 | 0.005 | – |
Fe | 0.005 | 0.02 | 0.03 |
Ni | 0.002 | 0.01 | 0.02 |
Cu | 0.002 | 0.005 | 0.005 |
Al | 0.002 | 0.002 | 0.01 |
Si | 0.005 | 0.01 | 0.02 |
As | – | – | 0.005 |
Sb | – | – | 0.005 |
Pb | – | – | 0.005 |
S | – | – | 0.01 |
P | – | – | 0.01 |
F – | 0.08 | 0.1 | 0.15 |
Ignition reduction (%) | 0.2 | 0.3 | 0.4 |
