Potassium Chloride (KCl) Optical Material

Potassium chloride is a non-glass optical ceramic material.

Material Properties

Density2.0 g/cm3 (120 lb/ft3)

Dielectric Constant (Relative Permittivity) At 1 MHz4.6

Elastic (Young's, Tensile) Modulus28 GPa (4.1 x 106 psi)

Electrical Dissipation At 1 MHz0.00010

Light Transmission Range0.21 to 20 µm

Melting Onset (Solidus)780 °C (1440 °F)

Poisson's Ratio0.18

Refractive Index1.6

Shear Modulus8.5 GPa (1.2 x 106 psi)

Specific Heat Capacity690 J/kg-K

Thermal Conductivity6.5 W/m-K

Thermal Diffusivity4.7 m2/s

Thermal Expansion36 µm/m-K

The length of each bar compares the given value to the highest value in the database.

Further Reading

Handbook of Optical Constants of Solids, Edward D. Palik (editor), 1998

Handbook of Optical Materials, Marvin J. Weber, 2003