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Optical Crystals

  • Product Name: BaF2
  • Maximum of Material Diameter:Φ180mm
  • Clear Aperture:85%
  • Surface Flatness:λ/4 @ 633nm
  • Surface Quality:20/10

Product overview





Optical Properties

Transmission Range

150 nm to 14 μm

Transmittance

>94% at 350 nm to 10.8 μm

Refractive Index

1.4624 at 2.58 μm

1.3936 at 10.35 μm

Reflection Loss

6.8% at 2.58 μm (both surfaces)

5.3% at 10.35 μm (both surfaces)

Radiation Length

20.6 mm

Residual Radiation Peak

47 nm

Emission Peak

310 nm slow; 220 nm fast

Decay Constant

620 ns slow; 0.6 ns fast

Light Output

20% slow; 4% fast

Absorption Coefficient

3.2 x 10-4 cm-1 at 6 μm

dn/dT

-15.2 x 10-6 /℃

Physical Properties

Density

4.89 g/cm3

Melting Point

1280℃

Thermal Conductivity

11.72 Wm-1K-1 at 286K

Thermal Expansion

18.1 x 10-6 /℃ at 273K

Knoop Hardness

82 with 500g indenter (kg/mm2)

Specific Heat Capacity

410J/(kg.k)

Dielectric Constant

7.33 at 1MHz

Youngs Modulus (E)

53.07 GPa

Shear Modulus (G)

25.4 GPa

Bulk Modulus (K)

56.4 GPa

Elastic Coefficient

Elastic CoefficientElastic Coefficient

Apparent Elastic Limit

26.9 MPa (3900 psi)

Poisson Ratio

0.343

Chemical Properties

Solubility

0.0017 g/ 100g water at 23℃

Molecular Weight

175.36

Structure

Cubic Crystal

Cleavage Plane

(111)