Magnesium Fluoride (MgF2)

Boiling Point:2239 ^oC 

Melting Point:1261 ^oC

Specific Gravity:2.9 - 3.2 g/cc     

Solubility in H₂O: Soluble           

Appearance and Odor:    Clear to white powder or pieces, no odor.

Magnesium  Fluoride Sputtering Target

Shape --- Discs, Plate,Step (Dia ¡Ü300mm,,  Thickness ¡Ý1mm)

                 Rectangle, Sheet, Step (Length ¡Ü600mm, Width ¡Ü250mm, Thickness ¡Ý1mm)

Purity ---  99.9-99.999%

Magnesium Fluoride Evaporation Material 

Density ---3.18 g/cm3    Purity--- 99.9-99.999% or international standards type

Melting point--- 1260 ℃    

Boiling point--- 2239 ℃,Vapour pressure at 1150℃ 1 Pa ,at 1300℃ 10 Pa
Cubic expansion coefficient---3.2¡Á10-5K
Specific heat capacity--- 1KJ/KgK, Thermal conductiveity--- 3.15W/mK
Hardness--- (acc. to Mohs) 5--6, (acc. to Knoop) 576 Kg/mm2
Properties of thin film
       Transmission range 130～7000nm
       Refractive index at 210nm ～ 1.42      at 550nm ～ 1.38
                                    at 2800nm ～1.36    at 5300nm ～ 1.33
       Absorption coefficient at 500nm 10-4
       Structure Substrate temperature at room: amorphous
       Substrate temperature above 250℃: crystalline
Hints on evaporation
       Boat on molybdenum or electron-beam gun
       Substrate temperature ～ 200～ 300℃
       Evaporation pressures 5¡Á10-3Pa 

Shape---solid substance,Colourless transparent granular

Specification--- custom-made      Solubility--- Soluble in nitric acid.

Application---Multi-layer anti-reflection coatings,beam-splitter, filters, etc.