Superior Evaporants Incorporated 

Technical Information

Material:  Aluminum Oxide

 

 

Formula: Al2O3

Product Form: granules 2.5 ‑ 5 mm

Molecular weight:  100.96

Catalog#: 1100

 

Density ~ 3.91 g/cm3

Melting point:  2040 oC

Specific heat capacity:  0 ‑ 78 J/kgoK

Hardness (acc. to Knoop) ~ 1370 Kg/mm2

Solubility: Insoluble in H2O, slightly soluble in acids 

 

Type analysis:

Iron(Fe)          < 5 ppm

Nickel(Ni)        < 6 ppm

Manganese(Mn)     < 1 ppm

Chromium(Cr)      < 1 ppm

Cobalt(Co)        < 1 ppm

Copper(Cu)        < 2 ppm       

Titanium(Ti)      < 2 ppm

              Sodium(Na)        < 2 ppm

              Potassium(K)      < 2 ppm

              Magnesium(Mg)     < 6 ppm

 

 

Properties of thin film:

Transmission range: 200 ‑ 5000 nm

Refractive index at 500 nm  1.64nd

Evaporation temperature ~ 2000‑2200 oC

Hints on evaporation:

Substrate temperature: 250‑300 oC

Evaporate using E‑Beam

Deposition rate ~ 60 nm/min

O2 partial pressure ~ 8 x 10-5 nbar

Index of Film is dependent upon both rate of deposition and substrate temperature                    

 

Applications:

Antireflection coatings, multi‑layer coatings, interference filters, protective films.