Silicon nitride is a chemical compound made of silicon and nitrogen, commonly represented by the formula Si3N4. It is known for its exceptional strength, durability, and resistance to high temperatures, making it useful in various industrial applications, including ceramics and electronics. This material is often used in the production of cutting tools, bearings, and engine components due to its ability to withstand wear and thermal shock. Additionally, silicon nitride is utilized in the semiconductor industry for its insulating properties, contributing to the performance of electronic devices.