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Tungsten Evaporation Material (W)

Tungsten Evaporation Material (W)
Material Type Tungsten
Symbol W
Atomic Weight 183.84
Atomic Number 74
Color/Appearance Grayish White, Lustrous, Metallic
Thermal Conductivity 174 W/m.K
Melting Point (°C) 3,410
Coefficient of Thermal Expansion 4.5 x 10-6/K
Theoretical Density (g/cc) 19.25
Z Ratio 0.163
E-Beam Good
E-Beam Crucible Liner Material Direct in Hearth
Temp. (°C) for Given Vap. Press. (Torr) 10-8:  2,117
10-6:  2,407
10-4:  2,757
Comments Forms volatile oxides. Films hard and adherent.
 

General

Tungsten, also known as Wolfram, is one of the densest elements in the world. It has a density of 19.3 g/cc, a melting point of 3,410°C, and a vapor pressure of 10-4 Torr at 2,757°C. It is lustrous and grayish-white in appearance. It is known to have the highest melting point of all metals and its characteristic hardness can make it very difficult to machine and forge in pure form. Tungsten is commonly used to make electric filaments. Tungsten carbide is found in drills, saws, and jewelry. Tungsten is evaporated under vacuum for the production of semiconductors, fuel cells.

Material Notes

AEM Deposition provides Tungsten pellets, Tungsten pieces, and Tungsten powder, purity is 99.95%.

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