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BaF2 (Barium Flouride) material
  • BaF2 (Barium Flouride) material
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Product Details

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 can provide deep ultraviolet ( excimer level ), ultraviolet and infrared level calcium fluoride materials and components.
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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