CRYSTALS
Laser Crystals
Optical Crystals
YAG
Quartz [ SiO2 ]
Sapphire [ Al2O3 ]
Zinc Selenide [ ZnSe ]
Lithium Fluoride [ LiF ]
Barium Fluoride [ BaF2 ]
Calcium Fluoride [ CaF2 ]
Gallium Arsenide [ GaAs ]
Magnesium Fluoride [ MgF2 ]
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BARIUM FLUORIDE CRYSTALS [ BaF2 ]
 
 
BaF2 is relatively hard but is highly sensitive to thermal shock. For its transmission range is 0.2 μm - 11 μm, the material is used for optical windows, lenses and prisms in UV-IR. Besides it can also be used as substrate for some applications. BaF2 is less resistant to attack by water than CaF2. Pronounced water attack occurs at 500°C, but in a dry environment the material can be used to 800°C. BaF2 is grown by modified Bridgman technique. Maximum available size: Dia 200 mm x Thickness 50mm. In addition, BaF2 is usually used as scintillator for gamma detection. It is the fastest scintillating crystals up to now.
 
 
 
 
Specification
Maximum Size
Single Crystal: Φ100 × 100 mm
Poly Crystal: Φ200 × 100 mm [ 3 ~7 boundaries ]
Dimension Tolerance ± 0.1mm
Flatness Tolerance λ ~ λ /10 at 632.8 nm over central 90% of edge dimensional
Parallelism ±1 arc sec ~ ±3 arc min
Cosmetic Surface Quality 10 / 5
Specific Heat Capacity 410 J/ [ kg K ] at 27 °C
Dielectric Constant 7.33 at 2MHz
Young's Modulus [ E ] 53.07 GPa
Shear Modulus [ G ] 25.4 GPa
Bulk Modulus [ K ] 56.4 GPa
Elastic Coefficients C11=89.2MPa C12=40.0Mpa C44=25.4MPa
Apparent Elastic Limit 26.89 MPa
Poisson Ratio 0.343
   
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