Features
Barium Fluoride is commonly used as a prism, window, or lens in the wide range of wavelengths from vacuum ultraviolet 150nm to the infrared 15um. The highest quality BaF2has an application as the fastest known scintillation material.
Specifications
Clear Aperture-----------------------------------85% of Diameter
Surface Flatness---------------------------------λ/4 at 633nm
Surface Quality----------------------------------20/10
Capabilities
1. Material: VUV Grade BaF2
2. Diameter: 1-45mm
3. Length: 1-75mm
Optical properties
| Transmission Range (graph below) |
0.15 to 12.5 microns
|
|
Refractive Index (table below)
|
1.39636 at 10.35 microns
|
| Reflection Loss |
5.3% at 10.35 microns (2 surfaces)
|
|
Absorption Coefficient
|
3.2 x 10-4 cm-1 at 6 microns
|
| Restrahlen Peak |
47nm
|
|
dN/dT
|
-15.2 x 10-6/oC
|
|
Physical properties
| Density |
4.89 gm/cc
|
|
Melting Point
|
1280oC
|
| Thermal Conductivity |
11.72Wm-1K-1 at 286K
|
|
Thermal Expansion
|
18.1 x 10-6/oC at 273K
|
| Hardness |
Knoop 82 with 500gindenter
|
|
Specific Heat Capacity
|
410 J Kgm-1K-1
|
| 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 |
C11 = 89.2 C12 = 40.0 C44 = 25.4
|
|
Apparent Elastic Limit
|
26.9 MPa (3900psi)
|
| Poisson Ratio |
0.343
|
|
Chemical properties
| Solubility |
0.17g/100g water at 23K
|
|
Molecular Weight
|
175.36
|
| Class/Structure |
Cubic CaF2, Fm3m, (111) cleavage
|
|
