The Composition of Sapphire Glass

Sapphire glass is a transparent synthetic material, usually made of aluminum oxide (Al₂O₃). Due to its excellent hardness, transparency and scratch resistance, sapphire glass is widely used in a variety of high-end applications, such as watch surfaces, smartphone lenses, camera lenses, submarine windows and laser devices, etc..

The main component of sapphire glass is aluminium oxide, and its chemical formula is Al₂O₃, which represents a compound composed of oxygen and aluminum. In addition to the main alumina composition, sapphire glass usually contains trace impurities, including iron, chromium, titanium, etc., which can affect its color and optical properties.

The preparation of sapphire glass typically involves melting alumina at high temperatures and forming a single crystal or polycrystal sapphire material through various techniques, such as solidification and vapor deposition. Subsequently, the materials can be cut, ground and polished in order to obtain the final clear, hard glass sheet or lens.

Sapphire glass is renowned for its exceptional physical properties, including high hardness, high scratch resistance, high transparency, and high temperature resistance. These attributes have made it a highly desirable material for a vast array of high-end applications.

• High hardness: The hardness of sapphire glass is second only to diamond, with a high Mohs hardness, which can resist scratches frommost substances.

• High abrasion resistance: Sapphire glass has excellent abrasion resistance and can be used for a long time in a variety of harsh environments.

• High corrosion resistance: Sapphire glass has strong corrosion resistance and can resist the erosion of most chemical substances.

• High temperature resistance: Sapphire glass has good stability at high temperatures and can be applied to high temperature environments.

• Electrical insulation: Sapphire glass exhibits excellent electrical insulation, rendering it an appropriate material for use in electronic components operating in high-frequency and high-voltage environments.