Sapphire Glass

Sapphire Glass is Pure Aluminium Oxide (Corundum) one of the hardest natural substances next to diamond. It can be considered a ceramic more than a glass, but its’ transparency, give it the benefits of a glass. The unique properties of Sapphire Glass make it ideal for several specialised applications. In particular where there is a requirement for maximum heat resistance, and maximum hardness.

Sapphire Glass is renowned for its scratch resistance, It can only be scored by diamond, and is used for watch glasses on high specification watches such as Rolex.

It is non-porous and is highly resistance to the most abrasive chemical attack, unlike other glasses it is almost totally insoluble.

The optical transmission of Sapphire Glass is renowned, making it suitable for high specification lens and similar.

Sapphire Glass

The technical data sheet and light transmission chart are given below:

Key Features of Sapphire Glass:
  • It resists temperatures to 1800°C with very low thermal expansion
  • It is very hard up to Mohd 9
  • Very high tensile strength
  • Excellent abrasion resistance, only diamond can scratch it
  • Optical transmission with very little absorption from 0.250 to 5.0 microns
  • Excellent resistance to chemical attack
  • Non-porous
  • Electrical insulator
  • Sight Glass Windows
  • Optical Applications
  • Wristwatch Glass
  • Chemical and Electronic Industry Wafers