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Barium Fluoride (BaF2) Evaporation Materials
Purity--- 99.9%,99.99% Density @ 293 K--- 4.83 g/cm3
Shape--- White transparent granules, Cylinders, Pellets, Irregular Pieces,Solid substance, Custom-Made
Dimension---1-3mm, 4-10mm, Custom-Made
Melting Point--- 1280 ¡ãC Boiling Point--- 2137 ¡ãC
Evaporation temperature---Vapour pressure, at 1130 ℃ 1 Pa, at 1262 ℃ 10 Pa
Solubility---0.12 g/100 g H2O (25℃)
Coefficient of linear thermal expansion ---2.03¡Á10-5/K
Specific heat capacity--- 0.406 KJ/KG.K
Hardness ---(acc. to Mohs) 3, (acc. to knoop) 82 Kg/mm2
Properties of thin film---
Transmission range ~ 220~11000nm
Refractive index at 500nm 1.48, at 2800nm 1.46, at 10600nm 1.40
Hints on evaporation---
Evaporation with molybdenum,tantalum , platinum boat or electron-beam gun.
Substrate temperature ~100 ~ 300℃
Evaporation temperature ~1300 ~ 1500℃
Application---Multi-layer coatings in the IR and anti-reflection coatings in the IR. |