TEJING TUNGSTEN

Ammonium Paratungstate (APT)

  • Formula: 5(NH4)2O.12WO3.5H2O
  • Appearance: Free flowing white crystalline powder without any other cast or foreign matter
  • Packing: In bags of 100kg, 200kg, 1000kg net each
GradeStandardTypical
WO3 (%min)88.588.93
Impurity Content (ppm max) Al 5 3
Fe 10 6
S 7 5
As 10 7
P 7 5
Mo 20 10
Ca 10 6
Mg 7 3
K 10 6
Na 10 5
Si 10 6
Cu 3 1
Mn 10 3
Ni 7 3
Pb 1 0.5
Bi 1 0.5
Sn 1 0.5
Sb 8 3
V 10 3
Ti 10 3
Cr 10 3
Co 10 3
Cd - 0.5
Fsss (35-46μm) Scott Density: 1.8-2.6 g/cm3
Ignition loss: max. 11.5%  

NOTE:

  • K is not regarded as impurity
  • Material of 40-46 micron is mainly used for producing tungsten bar for drawing wire
  • Any particular requirement to the products can be discussed