Materials Page
Terminology

Al2O3 (Alumina)

Bulk Properties

Melting Point:  2020 ºC
Density: 4.0 gm/cc

Young's
Modulus:  53 Mpsi

Film Properties

Evap. Temp.: 2100 ºC
Film Growth:  crystalline with low packing density
Film Hardness:  Hard

Common uses:   Used for aluminum mirror protection coatings, in UV laser antireflection coatings and high reflectors.  Specimen support for electron diffration.

Comments:  High temperature dielectric.  Adhesion is good on glass, other oxide materials, and some plastics.  Less background oxygen is needed to obtain low absorbing films.