BaF2 (Barium Flouride) material
BaF2 is transparent from the ultraviolet to the infrared, from 150-200nm to 11-11.5μm, and can be used as a material to make optical components such as lenses. It is used in windows for infrared spectroscopy, in particular in the field of fuel oil analysis. Its transmittance at 200nm is relatively low (0.60), but at 500nm it goes up to 0.96-0.97 and stays at that level until 9μm, then it starts falling off (0.85 for 10μm and 0.42 for 12μm). The refractive index is about 1.46 from 700nm to 5μm. Barium Flouride is used as a preopacifying agent and in enamel and glazing frits production. It is also used in metallurgy, as molten bath for refining aluminum.
We have all kinds of orientation, such as <111>、<110>、<100> etc.
We have all shapes of material, such as round rod、square plate、step、prism、wedge and so on.
We have all kinds of conventional plate、spherical and wedge in our stock.
We have the size of 4mm-200mm mono crystal and poly crystal materials and optical element.
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
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