Superior Evaporants Incorporated

Technical Information

Material:  Cryolite

 

 

 

Formula: Na3AlF6

Molecular weight: 210

Product Form: White granules 1‑3.5mm

Catalog#:  1400

 

Solubility: Soluble in H2O

Melting point: 1000oC

Density: ~ 2.9 g/cm3

Vapor pressure at 925oC ~ 1 x 10‑3 mbarr

 

Type analysis:

Iron(Fe)          <20 ppm

Nickel(Ni)        < 2 ppm

Cobalt(Co)        < 3 ppm

Copper(Cu)        < 1 ppm

Chromium(Cr)      < 1 ppm  

Mangenese(Mn)     < 1 ppm

Titanium(Ti)      < 1 ppm

 

 

Properties of thin film:

 

Transmission range: 250‑2000nm

Refractive index at 500nm ~ 1.33

Evaporation temperature: ~ 1000oC

 

Hints on evaporation:

 

 

Evaporate using E‑Beam with diffuse beam or resistance heated

molybdenum boat.

 

 

Applications:

 

Anti‑reflection coatings, Interference filters