|
|
| |
 |
Ge |
|
|
|
|
Germanium
monocrystal
Germanium
is most widely used for lenses and windows in IR systems operating in the 2 µm -
12 µm range.
Technical data
|
Transparent region（μm） |
1.8-23 |
|
Homogeneity of refractive index |
4.89*10-5(φ250mm) |
|
Refractive index |
4.0032 (10μm) |
|
Temperature coefficient of refravtice index (10-6/10C) |
400 |
|
(10mm.cm-1) Adsorption coefficient |
0.02 |
|
Hardness(knoop) (kg/cm2) |
800 |
|
Density(g/cm3) |
5.33 |
|
Rupture modulus(Gpa) |
75 |
|
Young
modulus(Gpa) |
103 |
|
Posson ratio |
0.28 |
|
Melting Point(℃) |
937 |
|
Thermal Conductivity(mcalcm-1s-1k-1) |
143 |
|
Specific heat(Cal/g.k.) |
0.074 |
|
Dielectric constant |
16 |
|
Resistivity Ω.cm |
10-30 |
|
Largest diameter(mm) |
260 |
|
|
|
|
|
|
|
