Lithium Fluoride LiF is a material with special optical properties, and its crystals can be grown in a directional manner during manufacturing. Due to its excellent optical properties, especially its high light transmission and short cut-off wavelength, directional lithium fluoride has a wide range of applications in the field of optics.In the manufacturing of optical instruments, it can be used as a material for elements such as lenses, prisms, and windows. Due to its high light transmission and low refractive index, directional lithium fluoride can be used to manufacture various optical instruments, such as telescopes and microscopes, to correct the shape of images and improve the quality of images. In addition, due to its absorption characteristics for X-rays, directional lithium fluoride can also be used to manufacture X-ray detector crystals.
Materials that can be used as windows in environmental monitoring equipment manufacturing. Due to its sensitivity to thermal shock and fragility, oriented lithium fluoride is often used as a single-crystal or polycrystalline protective window to avoid the interference effect (etalon effect) caused by the reflection of light from the front and back surfaces of the window with high parallelism, and to avoid the stability of laser output and mode jumping caused by optical interference feedback in the laser resonator.
Performance Parameter
| Transmission Range | 0.11-7μm |
| Transmittance | >94.8%@0.6μm |
| Reflection Loss | 5.2%@0.6μm(both surfaces) |
| Absorption Coefficienet | 5.9×10-3@4.3μm |
| Structure | Cubic Crystal System |
| Cleavage Planes | <100> |
| Physical Properties | |
| Density[g/cm3] | 2.639 |
| Melting Point [℃] | 848 |
| Thermal Conductivity [W/(m×K)] | 11.3 @ 314K |
| Thermal Expansion Coefficient [10-6/K] | 37.0 @ 283K |
| N努氏硬度Knoop Hardness [kg/mm2] | 415 |
| Specific Heat Capacity [J/(kg×K)] | 1562 |
| Dielectric Constant | 7.33 @ 1 MHz |
| Young's Modulus (E) [GPa] | 64.79 |
| Shear Modulus(G) [GPa] | 55.14 |
| Volume modulus Bulk modulus(K) [GPa] | 62.03 |
| Poisson Coefficient | 0.22 |
| Chemical Properties | |
| Solubility / g/L | 2.7g @ 20℃ |
| Molecular Weight / g/mol | 25.9394 |
| Purpose | Related industries |
| Optical instruments manufacturing | Telescopes, microscopes manufacturing |
| Environmental monitoring equipment manufacturing | Air quality monitoring, water quality monitoring |
| X-ray detector manufacturing | Medical imaging, security equipment |
