Lithium fluoride (LiF) is most widely used as a flux in the production of ceramics, such as enamels, glasses and glazes. Similarly it is also used in brazing and welding fluxes and molten salt chemistry in metallurgy. It is also used for: X-Ray monochromator plates as an analysis crystal.
What Are the Top 3 Uses for Lithium Fluoride (LiF)?
Flux in Ceramics and Metallurgy
Lithium fluoride (LiF) is most widely used as a flux in the production of ceramics, including enamels, glasses, and glazes. Its fluxing properties help lower melting points, improve sintering, and enhance the final product's quality. Similarly, in metallurgy, lithium fluoride is a key component in brazing and welding fluxes as well as in molten salt chemistry, where it assists in metal purification and alloy formation.
Optical and Analytical Applications
Lithium fluoride (LiF) serves as a material for X-ray monochromator plates, which are used as analysis crystals in X-ray spectroscopy and diffraction. Its excellent transparency and stability in ultraviolet and X-ray ranges make it invaluable for various optical devices and scientific instruments.
Electrolysis Additive and Battery Materials
In the electrochemical industry, lithium fluoride is used as an additive in aluminum and rare earth electrolysis processes to improve efficiency and product quality. Furthermore, it is a crucial raw material for producing lithium hexafluorophosphate, a common electrolyte in lithium-ion batteries, thereby playing an important role in energy storage technology.
Specification (Battery Grade)
| Item | Specification |
| CAS No. | 7789-24-4 |
| EINEC No. | 232-152-0 |
| Formula | LiF |
| Purity | 99.95% Min. |
| Appearance | White crystalline |
| Formula weight | 25.94 |
| Density | 2.635 g/cm³ at 20°C |
| Solubility | Slightly soluble in water |
Technology Index
| Appearance | White powder |
| LiF | 99.95%min |
| K | 20 ppm max |
| Na | 20 ppm max |
| Ca | 20 ppm max |
| Mg | 10 ppm max |
| Fe | 20 ppm max |
| Cl | 20 ppm max |
| SO4 | 50 ppm max |
| SiO2 | 300 ppm max |
| Al | 10 ppm max |
| Pb | 10 ppm max |
| H2O(110ºC) | 200 ppm max |
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