03 May Lithium Fluoride (LiF)
Posted at 22:10h
in LiF
Lithium Fluoride (Lif) crystal have an high transmission in UV range till FIR. It is common used as substrate for windows, lenses and prisms for thermal imaging systems.
| Specification | |
|---|---|
| Transmission wavelength | 120nm - 7000nm |
| Material | Lithium Fluoride (LiF) |
| Density (g/cm³) | 2.639 |
| Dielectric constant | 9.1 @25°C |
| Melting point (°C) | 870 |
| Apparent elastic limit (Mpa) | 11.2 |
| Thermal expansion coefficient (1/k) | 37*10¯⁶ |
| Thermal Conductivity (J/k.m.s.) | 40.1 @ 41°C |
| Specific heat (J/g.k) | 1.562 @10°C |
| Knoop hardness (Kg/mm²) | 102-113 |
| Young modulus (GPa) | 64.79 |
| Shear modulus (GPa) | 55.14 |
| Bulk modulus (GPa) | 62.03 |
| Reflection loss (%) | 5.3 @500nm |
| Poisson ratio | 0.32 |
Lithium Fluoride (LiF)
windows
| Technical parameter | Commercial grade | Precision grade | High precision grade |
|---|---|---|---|
| Dimension range | 1-600mm | 2-600mm | 2-600mm |
| Dimension tolerance | ±0.1mm | ±0.025mm | ±0.01mm |
| Thickness tolerance | ±0.1mm | ±0.025mm | ±0.01mm |
| Angle tolerance | ±3' | ±15" | ±5" |
| Surface quality | 60-40 | 40-20 | 20-10 |
| Surface accuracy | 1.0λ | λ/10 | λ/20 |
| Bevelling | 0.1-0.5mmx45° | ||
| Substrate | Lithium Fluoride (LiF) | ||