Aluminium Oxides
Al2O3 ,(Aluminium oxides) are chemical compounds with white or clear appearance that can be found in the nature as the mineral corundum.
Specifications
| Shape | Color | Purity | Package | Storage | ||
|---|---|---|---|---|---|---|
| Crystal | Granule | 1-3 mm 3-5 mm | Colorless Transparent | 99.99% | 1 Kg/Bag | Avoid exposure to sunlight & acid Keep dry |
| Sinter | Tablet | 9x5 mm Upon demand | White | |||
Characteristics of aluminium oxide
| CAS Number | Density (g/cm3) | Boiling point (Cº) | Melting point (Cº) | Refractive index at 550 (nm) | Transparency range (µm) | Evaporation source |
|---|---|---|---|---|---|---|
| 1344-28-1 | 3.6 | 2977 | 2020 | 1.54 | 0.17-9 | B(W), E |
| Applications | AR coating; Glasses coating; Protective coating | |||||
Evaporation technique
To evaporate thermally aluminium oxide it is required high temperatures to obtain reasonable deposition rates. Electron beam evaporation is preferred for depositing aluminium oxide films as the material is rated excellent for this method. It can be evaporated from a tungsten crucible liner or from the copper hearth.