Simple understanding of industrial sapphire
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, high strength, Mohs 9 hardness, wear resistance, electrical insulation and hermeticity. The processing chain runs seed crystal, growth, orientation, boule,...