Tungsten (W)
- Practical Electron Microscopy and Database -
- An Online Book -

http://www.globalsino.com/EM/  



 
This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

=================================================================================

Table 2024a. Properties of tungsten (W) .

Resistivity (10-6 Ω•cm)
5.65
Corrosion in air
Good
Melting point (°C)
3387
Specific heat capacity(Jkg-1K-1)
138
Thermal conductivity (Wcm-1)
1.74
Adhesion to SiO2
Poor
Thermal stress per degree for
films on silicon (107 dyn cm-2 °C-1)
0.8
Youngs modulus
(10-11 dyn cm-2)
41.1
Coefficient of thermal expansion (CTE) (10-6 °C-1)
4.5
  Density (g-cm-3)
19.3
Heat conductivity (kh,Wcm-1K-1)
1.67
  Melt heat (Qm, J-g-1)
193
Vaporization temperature (Tv, °C)
5930
  Vaporization heat (Qv, J-g-1)
3980
Absorption (1-R)
0.41 for 1 µm light

As listed in Table 2024b, substances with large bonding energies usually have high melting temperatures.

Table 2024b. Bonding energies and melting temperatures of metallic substances.

Bonding type

Substance
Bonding energy
Melting point (°C)
kJ/mol kcal/mol eV/Atom, Ion, or Molecule
Metallic
Typical value 50-1000      
Hg 68 16 0.7 -39
Al 324 77 3.4 660
Fe 406 97 4.2 1538
W 849 203 8.8 3410

Figure 2024 shows the solubility for impurities (including W) in SiC.

Solubility for impurities in SiC

Figure 2024. Solubility for impurities in SiC.

 

 

 

 

=================================================================================

The book author (Yougui Liao) welcomes your comments, suggestions, and corrections, please click here for submission. If you let book author know once you have cited this book, the brief information of your publication will appear on the “Times Cited” page.