Aluminum oxide  (Al₂O₃)

Appearance:                  colorless transparent pellets or blue half-transparent pellets 

Density:                     3.97 g/cm³

Vapor pressure:               1 Pa at 2000℃      10 Pa at2200℃

Hardness(Mohs hardness):     9

Melting point:                 2040℃

Solubility:                    non-soluble in water, soluble in acid and alkali

Transmittance scope:           200-5000nm

Refractive index(500nm):       1.63

Vapour deposition condition:     evaporated by electron gun

Vapour deposition temp.:        2000-2200℃

Purity:        >99.99%

Applications:  anti-reflection film, multi-layer film, interference filter, protection film, etc.

Specs:       1-3mm   1-5mm