Material - Aluminium (Al)
Aluminum has a high reflectance over the entire visible and near infrared spectrum.
Aluminum has a high reflectance over the entire visible and near infrared spectrum. It is simple to deposit as a thin film, making it the ideal choice for most non-critical applications. The aluminum is overcoated with a single layer of MgF2 to make it considerably more durable than bare aluminum.
BASE PROPERTIES
|
PARAMETER |
|
VALUE |
|
|
|
|
|
|
| OPTICAL |
|
| |
Termal Radiation Coefficient |
|
0.04 … 0.06 at 323 … 773 K |
| PHYSICAL |
|
| |
Density |
|
2.7 g/cm3 at 293 K |
|
| |
Melting Point |
|
933 К |
|
| |
Heat of Melting |
|
322 ... 394 kJ/kg |
|
| |
Thermal Conductivity |
|
225 Wm-1K-1at 293K |
|
| |
Thermal Expansion |
|
18.85 x 10-6/°C |
|
| |
Hardness |
|
Knoop 158.3 kg/mm2 (100) |
|
| |
Specific Heat Capacity |
|
854J/(kg K) |
|
| |
Brinell Hardness |
|
167 MPa |
|
| |
Young's Modulus (E) |
|
71 GPa |
|
| |
Shear Modulus (G) |
|
26 GPa |
|
| |
Resistivity |
|
2.66 x 10-6 Ohm x cm at 293 K |
|
| |
Poisson Ratio |
|
0.26 |
|
REGULAR REFLECTANCE
| |
Wavelength, µm |
0.76 |
1,0 |
2.0 |
3.0 |
4.0 |
10.0 |
|
| |
Regular Reflectance |
0.72 |
0.75 |
0.86 |
0.91 |
0.92 |
0,98 |
|
|
