Lithium Fluoride (LiF) has the lowest refractive index of all common infrared materials. It also possesses the highest UV transmission of any material, being able to transmit significantly into the VUV region at the hydrogen Lyman-alpha line (121nm).
It is slightly soluble in water, while being soluble in HDF and other acids. However, it can be cleaned with alcohol.
Lithium fluoride 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
• Heat sink materials
• UV transmission windows
|Melting Point (°C)
|Co-Efficient of Thermal Expansion (x10-6 /°C)
|Young’s Modulus (GPa)
|Refractive Index at 1.0µm