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Lithium Fluoride

With the broadest range of fluoride compound manufacturing and fluoride coating materials in the industry, Materion manufactures Lithium Fluoride (LiF) with up to 99.9% purity. While originally designed as a low index material for UV, VIS and NIR spectrum thin films, new demands from emerging display technologies has enabled higher quality final products suitable for OLED technologies.

Refinements to this material as a high-volume evaporation material has reduced the cost and improved the availability making it a viable alternative to MgF2 in UV designs where stress and rate are finely tuned to material stability and growth mechanisms. Like the higher purity MgF2 required for UV designs, lithium fluoride is another rare material that is transparent at wavelengths shorter than the conventional oxide cut-off ~ 200 nanometers. Unlike MgF2, the same performance is possible at an overall lower purity which can lead to more uniform evaporation with less stress, or a lower overall temperature.

LiF, MgF2 and their sister high index materials LaF3, GdF3 and NdF3 are manufactured from principle reaction synthesis to final vacuum melting and sizing unique to Materion. In some cases, Materion’s ability to customize different aspects of the different steps allows us to address new markets and meet the needs of leading-edge optical coatings and thin films.

With LiF and all our Fluoride compounds, Materion is motivated to leverage our capabilities to meet industrial challenges for thin film coating materials, display technologies and energy storage/generation.

Lithium Fluoride (LiF)
Physical Properties

Molecular Weight:25.939 g/mol

Melting Point: 845°C

Boiling Point: 1,676°C

Structure: Crystalline

Available Forms and Sizes

Item # Chemical Formula Description Purity (TYP.) Cas #
123067 Lithium Fluoride LiF 3-6 mm pcs 99.9 (vac. dep. grade) 7789-24-4

More About Lithium Fluoride

1
Lithium Fluoride (LiF) has the lowest refractive index of all infrared materials.
2
LiF has the highest UV transmission rate.
3
LiF can be used as a coating on flexible substrates as a capsulation layer.
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