Superior Evaporants Incorporated

Technical Information

Material: Silicon Dioxide

 

 

Formula: SiO2

Molecular weight: 60.06

Product Form:  granules 2‑4mm

Catalog#:  2200

 

Density: 2.208 g/cm3

Melting point: 1700oC

Vapor pressure at 2200oC  10‑3 mbar

 

Solubility: Insoluble in H2O soluble in HF

 

 

Type analysis:

Iron(Fe)          <20 ppm

Nickel(Ni)        < 2 ppm

Chromium(Cr)      < 3 ppm

Manganese(Mn)     < 2 ppm

Titanium(Ti)      < 2 ppm

Copper(Cu)        < 2 ppm

 

 

Properties of thin film:

 

Transmission range: 200‑9000nm

Refractive index at 550nm ~ 1.45

Evaporation temperature ~ 1600‑2500oC

 

 

Hints on evaporation:

 

Evaporate using E‑Beam

Substrate temperature ~ 250‑300oC

O2 partial pressure ~ 1‑2 x 10‑4 mbar

Material partially sublimes.

 

Applications:

 

Multi‑layer coatings for laser mirrors, antireflection coatings, interference filters etc. Excellent material for U.V. coatings.