Хлорид Калий KCl

МакроОптика produces lenses, windows, prisms, wedges and others optical components according to customers’ specifications and drawings out of crystals potassium chloride KCl .

Potassium Chloride is mainly used for CO2 laser protection windows as an inexpensive disposable material with a low refractive index.

Potassium Chloride is produced in large ingots by the Kyropoulos growth method. Potassium Chloride cleaves easily. With care Potassium Chloride can be polished to a high standard under humidity controlled conditions.

Product Data

Transmission Range 0.21 to 20 μm
Refractive Index 1.45644 at 10 μm (2)
Reflection Loss 6.7% at 10 μm
Absorption Coefficient 6.5 x 10-3 cm-1 at 10.6 μm @ 300K (6)
Reststrahlen Peak 63.1 μm
dn/dT -33.2 x 10-6 /°C (1)
dn/dμ 0 : n/a
Density 1.99 g/cc
Melting Point 776°C
Thermal Conductivity 6.53 W m-1 K-1 at 322K (3)
Thermal Expansion 36 X 10-6 /k at 300k
Hardness Knoop 7.2 <110>, 9.3 <100> with 200g (4)
Specific Heat Capacity 690 J Kg-1 K-1
Dielectric Constant 4.64 at 1MHz at 300K
Youngs Modulus (E) 29.67 GPa (4)
Shear Modulus (G) 6.24 GPa (4)
Bulk Modulus (K) 17.36 GPa (4)
Elastic Coefficients C11=39.8; C12=6.2; C44=6.25 (5)
Apparent Elastic Limit 4.4 MPa (635 psi) (4)
Poisson Ratio 0.216
Solubility 34.7g/100g water
Molecular Weight 74.55
Class/Structure Cubic FCC, NaCl, Fm3m, (100) cleavage

Transmittance Refractive Index

No = Ordinary Ray

µm No µm No µm No
0.185 1.8271 0.200 1.7187 0.251 1.5897
0.308 1.54136 0.410 1.50907 0.509 1.4962
0.671 1.48669 0.883 1.48142 0.982 1.4800
1.179 1.47831 2.357 1.47475 2.947 1.47383
3.536 1.47305 4.715 1.47112 5.000 1.47048
6.000 1.46842 7.000 1.466 8.000 1.4629
9.000 1.46002 10.00 1.45644 11.00 1.45244
12.00 1.44801 13.00 1.44313 14.00 1.43779
15.00 1.43197 16.00 1.42563 17.00 1.41877
18.00 1.41134 19.00 1.40333 20.00 1.39469
21.00 1.38538 22.00 1.37537 23.00 1.36461
24.00 1.35303 25.00 1.34059 26.00 1.32721
27.00 1.31281 28.00 1.29731