高纯钨粉技术规格见下表：
|
Chemical Elements Type |
HW5N |
HW6N |
|
|
W（wt%） |
≥99.999％ |
≥99.9999％ |
|
|
NVR Elements Maximum Content (ppm) |
Total NVR |
≤10ppm |
≤1ppm |
|
Li |
0.05 |
0.01 |
|
|
Na |
0.5 |
0.5 |
|
|
K |
0.1 |
0.07 |
|
|
U |
0.0008 |
0.0005 |
|
|
Th |
0.0008 |
0.0005 |
|
|
Fe、Cr |
0.5 |
0.3 |
|
|
Mo、Re、Ba |
1 |
0.5 |
|
|
B, Pb, Sb, Be, Bi, Cd, Ge, Nb, Pt, Mg, Zr, Au, In, Ga, Ag |
0.1 |
0.1 |
|
|
P, As, Se, Ca, Si, Cu, Ni, Al, Zn, Sn, Mn, Co, Hg, V |
0.2 |
0.2 |
|
|
Other trace element |
0.1 |
0.1 |
|
|
Gas Element Maximum Content (ppm) |
O |
500 |
500 |
|
N |
50 |
50 |
|
|
C |
30 |
30 |
|
|
S |
25 |
10 |
|
|
H |
50 |
50 |
|
Fsss: 1.9~3.5 µm
所有粉末过200目筛