Silicon carbide has many colors, and due to the different types of silicon carbide, it can be applied in more fields, especially when it flashes beautifully in sunlight. In fact, pure silicon carbide is a colorless crystal, while the color of industrial silicon carbide depends on the type and amount of impurities present in the crystal, with various colors ranging from light yellow to black. The abrasive industry regards light blue to black as black silicon carbide; The colorless to green is green silicon carbide. There are various explanations for the color formation of silicon carbide. It is generally believed that it is caused by the presence of foreign impurities, such as introducing boron in the form of boron carbide, which will make the crystal appear black; When the crystal contains nitrogen, it is green.
The appearance color of silicon carbide is not only related to the color of the crystal itself, but also to the interference phenomenon of natural light on the surface film of the crystal. When the thickness of the silicon oxide film on the surface of silicon carbide crystals is different, or the reflection angle of light is different, the color of the surface of silicon carbide crystals also varies. Therefore, silicon carbide is often seen to have colorful colors under natural light. Different colors of silicon carbide have different production processes, so it is also necessary for everyone to understand the characteristics of different types of silicon carbide during use.