Huizhou Tianyi rare material Co., Ltd

About TYR
Product classification
  Sputtering Target
  Rare Earth Material
  Evaporation Material
  Chemical Reagent
  High Pure Metals
  Compounds
Product Details

Lithium Fluoride, LiF optical crystal material from TYR as following:

Shape: shots,pellets,pieces,granules,rods,tablets

Spec.:

Tablets: 8mm dia. X 5mm L, 10mm dia. X 5mm L, 20mm dia. X 8mm L e.t.c

Pieces, Granules: 1-2.5mm, 3-6mm, 3-8mm, 1-3mm, 3-12mm e.t.c

1200 ℃ volatile)Density: 2.6350 g/cm3, Solubility (water) :  Soluble in water, not soluble in alcohol, 

dissolved in acid.

Applications: In molten salts, Optics, Radiation detectors, Nuclear reactors, Cathode for PLED and OLEDs

Fluorine is produced by the electrolysis of molten potassium bifluoride. This electrolysis proceeds more 

efficiently when the electrolyte contains a few percent of LiF, possibly because it facilitates formation of

 Li-C-F interface on the carbon electrodes.A useful molten salt, FLiNaK, consists of a mixture of LiF, 

together with sodium fluoride and potassium fluoride. The primary coolant for the Molten-

Salt Reactor Experiment was FLiBe; LiF-BeF2 (66-33 mol%).

Because of its large band gap, LiF crystals are transparent to short wavelength ultraviolet radiation, more 

so than any other material. LiF is therefore used in specialized UV optics, (See also magnesium fluoride). 

Lithium fluoride is used also as crystal in X-ray spectrometry.

It is also used as a means to record ionizing radiation exposure from gamma rays, beta particles, and 

neutrons (indirectly, using the Li (n,alpha) nuclear reaction) in thermoluminescent dosimeters.

Lithium fluoride (highly enriched in the common isotope lithium) forms the basic constituent of the 

preferred fluoride salt mixture used in liquid-fluoride nuclear reactors. 

Typically lithium fluoride is mixed with beryllium fluoride to form a base solvent (FLiBe), into which 

fluorides of uranium and thorium are introduced. Lithium fluoride is exceptionally chemically stable and 

LiF/BeF2 mixtures (FLiBe) have low melting points (360 C - 459 C) and the best neutronic properties of 

fluoride salt combinations appropriate for reactor use. MSRE used two different mixtures in the two 

cooling circuits.

Lithium fluoride is widely used in PLED and OLED as a coupling layer to enhance electron injection.

 The thickness of LiF layer is usually around 1 nm. The dielectric constant (or relative permittivity) of 

LiF is 9.0

LiF crystal shows excellent transmittance in the VUV region. It is used for optical windows, prisms,

and lenses in the visible and infrared in 0.104 μm - 7 μm. LiF crystal is sensitive to thermal shock and

would be attacked by atmospheric moisture at 400°C. In addition irradiation produces color centers.

Modest precautions should be taken against moisture and high energy radiation damage. Besides LiF softens at 600°C and is slightly plastic that can be bent into radius plates. The material can be cleaved along (100) and less commonly (110). Although the optical characteristics are good, the structure is not perfect and cleavage is difficult. For good structure LiF is less commonly grown by the Kyropoulos technique (air-grown) specifically for monochromator plates. High quality LiF is usually grown by modified Bridgman technique. Maximum available size in diameters is about 115mm. LiF is slightly plastic and can be bent into radius plates.

LiF crystals have the following exceptional properties that make it a very important optics single crystal:

(1) High optical transmittance from the vacuum ultraviolet to the infrared spectrum region(0.12-6μm) and shows excellent transmittance in the VUV regions.

(2) Used for Optical prisms, lenses, wedges, windows, other optical components,and etc

Because of its particular lattice structure LiF can also be used as X-ray diffraction devices.

LiF Specifications:

We produce granules, prisms, lenses, wedges, windows and other optical components according to requested specifications and drawings.

Size: Diameter >60mm

Size tolerance: +/-0.1mm

Angle tolerance: +/- 10 arcand Specifications

Transmission Range (μm)

0.12 ~ 6

Refractive Index at 0.6 μm

1.39181

Reflection Loss at 0.6 μm

5.2% (2 surfaces)

Absorption Coefficient at 2.7μm (cm-1)

0.74×10-3

Transmission range (μm)

0.11~7.0

Density (g/cm3)

2.639

Melting Point (°C)

870

Molecular Weight

25.9394

Thermal Conductivity at 314K (Wm</-1K-1)

4.01

Thermal Expansion at 283K (K-1)

37×10-6

Knops Hardness

99.1–103kg/mm2

Specific Heat Capacity (J Kgm-1K-1)

1562

Elastic Coefficient

C11=112; C12=46; C44= 63.5

Apparent Elastic Limit

11.2 Mpa (1620 psi)

Poisson Ratio

0.326

Solubility in 100g water at 20°C (g)

0.27

Crystal orientation

(100)

Application

DUV, Vacuum UV

 

Wavelength (nm)

150

193

248

308

400

600

800

Refractive index

1.4990

1.4477

1.4182

1.4083

1.3992

1.3918

1.3889

 

Wavelength (nm)

1000

2000

3000

4000

5000

6000

7000

Refractive index

1.3871

1.3787

1.3666

1.3494

1.3266

1.2974

1.2556

We also supply below material:

Material Name Formula Purity Form
Aluminum Fluoride AlF3 99.9% Ceramic, Crystal
Yttrium Fluoride YbF3 99.99% Ceramic
Lanthanum Fluoride LaF3 99.99% Ceramic
Yttrium Fluoride YF3 99.9% Ceramic
Cerium Fluoride CeF3 99.99% Ceramic
Magnesium Fluoride MgF2 99.99% Crystal
Praseodymium Fluoride PrF3 99.9% Ceramic
Barium Fluoride BaF2 99.99% Ceramic, Crystal
Lithium Fluoride LiF 99.99% Crystal
Sodium Fluoride NaF 99.9% Ceramic, Crystal
Strontium Fluoride SrF2 99.9% Ceramic
Lead Fluoride PbF2 99.99% Ceramic, Crystal
Erbium Fluoride ErF3 99.9% Cerami

Product classification

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