Sapphire is a single crystal aluminum oxide (Al2O3). It is one of the hardest materials. Sapphire has good transmission characteristics over the visible, and near IR spectrum. It exhibits high mechanical strength, chemical resistance, thermal conductivity and thermal stability. It is often used as crystal materials in specific field such as space technology where scratch or high temperature resistance is required

1. sapphire crystals will not get dark and lose their brilliancy when exposed to UV light.

2. sapphire crystals are extremely stable and resistant to attack by strong acid due to sapphire’s high dielectric constant.

3. sapphire crystals offer wideband transmission from UV to Mid-IR (0.15-5.5µm).

All these unique properties make sapphire crystals the ideal material for extreme mechanical, chemical & optical applications.

Specification of sapphire crystal watch glass