Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 

































POTASSIUM CHLORIDE, KCl

Potassium Chloride is used for infrared windows, lenses and prisms when transmission in the 0.3 m - 20 m range is desired. Potassium Chloride is soluble in water and polished surfaces must be protected from exposure to moisture. Maximum operating temperature is 400 C. Maximum available size: 400 mm Dia x 50 mm Thk.



Main Properties

Chemical Formula KCl
Crystal Class Cubic
Lattice Constant, 6.29
Molecular Weight 74.55
Density, g/cm3 (20 C) 1.98
Reflection Loss, % for two surfaces at 10 m 6.8
Dielectric Constant for 106 Hz at 302 K 4.64
Melting Temperature, K 1050
Thermal Conductivity, W/(m K) at 315 K 6.7
Thermal Expansion, 1/K at 300 K 36.6 x 10-6
Specific Heat, cal/(g K) at 273 K 0.162
Debye Temperature, K 235
Bandgap, eV 8.5
Solubility, g/100 g H2O at 293 K 34.7
Knoop Hardness, kg/mm2 7.2[110], 9.3[100]
Young's Modulus, GPa 29.63
Rupture Modulus, GPa 0.0044
Shear Modulus, GPa 6.24
Bulk Modulus, GPa 17.36

Refractive Index

Wavelength, m 0.40 0.59 5.30 11.7 15.0 18.1 20.2 22.8 24.3
Refractive Index 1.51 1.49 1.47 1.45 1.43 1.41 1.39 1.37 1.35