Alkor Technologies manufactures optical windows made out of NaCl according to customer's specifications. Maximum available size of NaCl optics: 140 mm Dia x 50 mm Thk. Please contact us for more information.
NaCl transmittance. Sample thickness 10mm.
Sodium Chloride NaCl is used for windows and prisms where transmission in the range 0.25-16mkm is desired. The refractive index varies from about 1.6 to 1.4 in this range. Because of its low absorbtion, Sodium Chloride is being used in high power laser systems. Polished surfaces of NaCl windows must be protected from moisture by exposing to only a dry atmoshere or by using a heating element to maintain temperature of the NaCl part above the ambient temperature.
NaCl Sodium Chloride windows can be used to a temperature of 400C. NaCl is sensitive to thermal shock and irradiation generates color centers.
|
Chemical Formula |
NaCl |
|
Crystal Class |
Cubic |
|
Lattice Constant, Å |
5.65 |
| Molecular Weight |
58.45 |
|
Density, g/cm3 at 293 K |
2.17 |
| Reflection Loss, % for two surfaces at 10 µm |
7.5 |
Dielectric Constant for 102-2.5x1010 Hz
at 298 K
at 358 K |
5.9
6.35-5.97 |
| Melting Temperature, K |
1070 |
Thermal Conductivity, W/(m K)
at 80 K
at 289 K
at 400 K |
35.1
6.5
4.85 |
Thermal Expansion, 1/K
at 75 K
at 273 K
at 1000 K |
19.0
40.0
69.5 |
| Specific Heat, cal/(g K) at 273 K |
0.20 |
| Debye Temperature, K |
321 |
| Bandgap, eV |
9.0 |
| Solubility, g/100 g H2O at 273 K |
35.7 |
|
Knoop Hardness |
15.2 [110]
18.2 [100] |
| Young's Modulus, GPa |
39.96 |
| Rupture Modulus, GPa |
0.00393 |
| Shear Modulus, GPa |
8.97 |
| Bulk Modulus, GPa |
24.32 |
| Wavelength, µm |
0.35 |
0.46 |
0.68 |
1.25 |
4.50 |
7.30 |
9.50 |
10.6 |
12.0 |
13.1 |
14.2 |
15.1 |
16.0 |
| Refractive Index |
1.58 |
1.56 |
1.54 |
1.53 |
1.52 |
1.51 |
1.50 |
1.49 |
1.48 |
1.47 |
1.46 |
1.45 |
1.44 |
|