Superior Evaporants Incorporated

Technical Information

Material:  Magnesium Fluoride

 

 

Formula: MgF2

Product Form: granules 1‑2.5mm

Molecular weight:  62.31

Catalog#: 1800

 

Density ~ 3.18 g/cm3

Melting point:  1250oC

Vapor pressure at 1150oC ~ 10‑2 mbar

Expansion coefficient:  3.2 x 10‑5 K

Specific heat capacity:  1 kJ/kg K

 

Solubility: soluble in nitric acid.

 

 

Type analysis:

Cat# 1800                    Cat# 1808

Iron(Fe)          <20 ppm    Iron(Fe)          <10 ppm

Nickel(Ni)        < 5 ppm    Chromium(Cr)      < 5 ppm

Manganese(Mn)     < 6 ppm    Nickel(Ni)        < 5 ppm

Chromium(Cr)      < 9 ppm    Copper(Cu)        < 3 ppm

Copper(Cu)        < 4 ppm       

Titanium(Ti)      < 9 ppm

 

Properties of thin film:

 

Transmission range: 160‑7000nm

Refractive index at 550nm ~ 1.38

Refractive index at 250nm ~ 1.41

Refractive index at 2500nm ~ 1.36

Evaporation temperature~1450oC

Absorption coefficient: 500nm ~ 10‑4

 

Hints on evaporation:

 

Substrate temperature: 250oC

Evaporate using tantalum or molybdenum boat or E-Beam.

Premelt a crust before E‑Beam evaporation

Deposition rate: 100 nm/min

 

Applications:

 

Anti‑reflection coatings, broadband anti‑reflection coatings for glass (nd=1.48‑1.52) using Al2O3, Mixture #1(Cat#2000), and MgF2. Our Single Crystal MgF2 is excellent for deep U.V. coatings. For more information call 1‑800‑92SUPER.