|
Refractory Metals - Composites -Special Alloys -
Ceramics -Tungsten - Titanium
As a high
performance materials, Pure Tungsten has high melting
temperature, high density, low vapor pressure, low thermal
expansion combined with good thermal conductivity, sufficient
electrical resistance, high modulus of elasticity. Tungsten
sheets and disk are available with alkali washed or ground
finish. Depending on thickness, sizes are up to 450 x 1000 mm.
Thickness are from 0.1 to 15 mm.
Bar and rod stock are available with ground surfaces and
as sintered or swaged condition. Diameters range from 1 to 30
mm and up to 2000 mm long depending on size and conditioning.
Large ranges of custom crucibles and single crystal ingots are
offered.
Applications:
Furnace parts, Semiconductor Base
Plates, Components for Electron Tubes, Emission Cathodes for
Electron Beam Evaporation, Cathodes and Anodes for Ion
Implantation, Tubes / Boats for Sintering of Capacitors, Targets
for X-ray Diagnostics, Crucibles, Heating Elements, X-ray
Radiation Shielding, Sputtering Targets, Electrodes.
| |
Property |
Unit |
Value |
 |
|
|
|
Melting Point
|
°C |
3410 |
|
|
|
Max. Use Temperature |
°C |
1700 |
|
|
|
Electrical Resistivity |
@20 °C µ ohm-cm)
|
5.6
|
|
|
|
Electrical Conductivity |
@20 °C %IACS |
31 |
|
|
|
Thermal Expansion |
ppm / °C |
4.6
|
|
|
|
Thermal Conductivity |
W/m°k |
165 |
|
|
|
|
|
|
|
|
|
|
|
Impurities - max. % |
|
W |
Pb |
Bi |
Sn |
Sb |
As |
Fe |
Ni |
Cu |
|
99.95 min |
0.0001 |
0.0001 |
.0.0001 |
.0.001 |
0.002 |
0.005 |
0.003 |
0.001 |
|
Al |
Si |
Ca |
Mg |
Mo |
P |
C |
K |
Na |
|
0.001 |
0.003 |
0.002 |
0.002 |
0.008 |
0.001 |
0.005 |
0.002 |
0.002 |
|
|
| 
