Product Description
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---3.2×10-5K
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 5×10-3Pa
Shape---solid substance,Colourless transparent granular
Specification--- custom-made Solubility--- Soluble in nitric acid.
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