Aluminium Oxynitride

Aluminium oxynitride, also known as ALON, is a transparent ceramic composed of aluminium, oxygen, and nitrogen. It is notable for its high optical transparency (≥ 80%) across the near-ultraviolet, visible, and mid-wave infrared regions, and is significantly harder than traditional glass, making it suitable for various applications. With a density of approximately 3.69 g/cm³ and a melting point around 2150 °C, ALON exhibits impressive mechanical properties, including high compressive and flexural strength, as well as notable fracture toughness. Its resistance to acids, bases, and water enhances its durability. ALON is primarily used in the production of bulletproof and blast-resistant windows, as well as in optoelectronic applications. It has been tested by the U.S. Air Force for use in armor, demonstrating the ability to stop high-caliber armor-piercing rounds. The manufacturing process involves conventional ceramic powder techniques, followed by heat treatment and polishing to achieve transparency. The material's lightweight nature and superior mechanical properties make it a promising alternative to traditional glass-based armor.

- Aluminium oxynitride (ALON) is a transparent ceramic with high optical transparency and hardness.

- It is used in applications such as bulletproof windows and optoelectronic devices.

- ALON has been tested by the U.S. Air Force for its effectiveness in armor against armor-piercing projectiles.

- The material is resistant to various chemicals and has a high melting point, enhancing its durability.

- Conventional ceramic processing techniques are used for its manufacture, followed by heat treatment for improved properties.