Ensoll2026-09-07T10:44:38+08:00
Key Takeaways
Industrial sapphire is corundum (Al2O3) — natural or synthetic — that does not reach decorative gem grade and is instead used for its hardness, temperature resistance and insulation.
It serves two main purposes: substrate materials such as LED semiconductor substrates, and window materials for watch dials, aerospace and precision manufacturing.
Its value comes from corundum's property set: high temperature and corrosion resistance, Haute résistance, Mohs 9 dureté, Résistance à l’usure, electrical insulation and hermeticity.
The processing chain runs seed crystal, growth, orientation, boule,...