Calcium fluoride (CaF2) Optics

Transmission wavelength

130nm---10000nm

Material

Calcium fluoride(CaF2)

Density  (g . cm-3 )

3.18

Dielectric constant

6.76 @1HMZ

Melting point  (℃)

1360

Purity  (%)

99.9996

Thermal Expansion Coefficient(1/℃)

18.85* 10^-6

7.3* 10^-6@373k

Thermal Conductivity(J/k.m.s)

9.71

Specific Heat  (J/g.k)

0.854

Knoop Hardness(kg/mm2)

158.3

Young’s Modulus  (GPa)

75.8

Shear modulus  (GPa)

33.77

Poisson’s Ratio

^0.26

Bulk modulus(Gpa)

82.71

Reflection loss（2side）

5.4% @ 5000nm

Thermo-optical coeffecient.dn/dT(1/℃)

-10.6*10^-6