| Copyright © 1996- Marketech International - Privacy Policy |
Marketech International Inc.
107B Louisa Street
Port Townsend, WA 98368
Tel: 360-379-6707
Toll Free: 877-452-4910
Fax: 360-379-6907
info@mkt-intl.com
107B Louisa Street
Port Townsend, WA 98368
Tel: 360-379-6707
Toll Free: 877-452-4910
Fax: 360-379-6907
info@mkt-intl.com
Pure Tungsten
 |
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
|
