|
Raw Material Impurity Specification
Buffalo Tungsten uses the best quality raw materials to assure that our tungsten powders meet the highest standards. The following are chemical impurity standards for our APT, BTO and YTO, as well as the required sieve analysis.
MAXIMUM IMPURITY CONTENT (%)
|
Al
|
0.0010
|
Mo
|
0.0020
|
|
As
|
0.0010
|
Na
|
0.0010
|
|
Bi
|
0.0010
|
Ni
|
0.0007
|
|
C
|
0.0010
|
P
|
0.0007
|
|
Ca
|
0.0005
|
Pb
|
0.0002
|
|
Co
|
0.0005
|
S
|
0.0007
|
|
Cr
|
0.0010
|
Sb
|
0.0005
|
|
Cu
|
0.0005
|
Si
|
0.0010
|
|
Fe
|
0.0010
|
Sn
|
0.0003
|
|
K
|
0.0005
|
Ti
|
0.0010
|
|
Mn
|
0.0007
|
V
|
0.0010
|
|
Mg
|
0.0007
|
Zn
|
0.0010
|
|
|
|
OTHERS
|
0.0010
|
|
SIEVE ANALYSIS
|
+60 mesh
|
0%
|
+200 mesh
|
10-50%
|
|
+100 mesh
|
0-30%
|
+325 mesh
|
10-30%
|
|
+140 mesh
|
10-50%
|
-325 mesh
|
0-20%
|
|
|
