Single crystal sapphire has excellent photoelectric properties, stable chemical properties, high wear resistance, high melting point and high hardness. It is widely used in optoelectronics, communication, defense and other fields. Sapphire single crystal is the main source of current LED substrate materials. The solid-state lighting technology represented by LEDs has quickly become the first choice for illumination sources due to its high luminous efficiency, good safety performance, low energy consumption and long life. It has successfully extended its application fields from indicator lights to electronic displays. The backlight source of the display, car lights and daily lighting, etc., have broad market prospects. With the growth of sapphire applications, the use of abrasives for sapphire grinding and polishing has also increased, driving the development of its downstream industry.