In the market, we see silicon carbide in different colors. Due to the different types of silicon carbide, it can be used in many fields, especially these silicon carbides are very beautiful when they flash in the sun. In fact, pure silicon carbide is a colorless crystal. The color of industrial silicon carbide depends on the type and amount of impurities in the crystal, and there are many different colors ranging from light yellow to black. In the abrasive industry, light blue to black silicon carbide is considered black; from colorless to green - green silicon carbide. There are many different explanations for the color of silicon carbide. It is usually believed that it is due to the presence of foreign impurities. For example, when boron is introduced in the form of boron carbide, the crystal will be black, and if it contains nitrogen, it will be green.
The color of the appearance of silicon carbide is related not only to the color of the crystal itself, but also to the phenomenon of interference of natural light on a thin film on the surface of the crystal. When the thickness of the silicon oxide film on the surface of the silicon carbide crystal is different, or the angle of light reflection is different, the surface color of the silicon carbide crystal is also different. Therefore, silicon carbide often looks multi-colored in natural light. Silicon carbide of different colors has different manufacturing processes. Therefore, everyone should understand the characteristics of different types of silicon carbide in the process of use.
