Superior Evaporants Incorporated

Technical Information

Material:  Yttrium/Barium Fluoride

 

 

Formula: 90%YF3/10%BaF2

Product Form: granules 2.5‑5mm

Molecular weight:  175.34

Catalog#: 3600

 

Density ~4.89 g/cm3

Melting point:  1280oC

Expansion coefficient:  2.03 x 10‑4 K

Specific heat capacity:  1 kJ/kg K

 

 

Type analysis:

Iron(Fe)          <10 ppm

Nickel(Ni)        <20 ppm

Manganese(Mn)     < 1 ppm

Chromium(Cr)      < 2 ppm

Cobalt(Co)        <53 ppm

Copper(Cu)        <24 ppm       

 

 

Properties of thin film:

 

Transmission range: 220‑15000nm

Refractive index at 500nm ~ 1.48

Refractive index at 2000nm ~ 1.46

Refractive index at 10600nm ~ 1.40

Evaporation temperature ~1400oC

 

 

Hints on evaporation:

 

Substrate temperature: 100‑300oC

Evaporate using E‑Beam or tantalum or molybdenum boat.

 

 

Applications:

 

Multi‑layer coatings in the IR, antireflection coatings

in the IR. Good replacement for ThF4. Low stress films for the far I.R.