Since 2015, in the application market of rare earth polishing powder in China, the proportion of polishing powder for mobile phone cover glass has increased year by year. It is estimated that in 2020, about 25,000 tons/year of rare earth polishing powder will be consumed in the field of mobile phone shells; In the field of crystal rhinestones, the polished pendant is expected to consume 500 tons/year of rare earth polishing powder, and the polished rhinestone is expected to consume 800 tons/year of rare earth polishing powder; The optical field consumes 1,000 tons of rare earth polishing powder every year; TFT and other fields consume 3,000 tons of rare earth polishing powder per year.
Suspension: High-speed polishing requires the polishing powder to have good suspension, and the shape and size of the particles have a great influence on the suspension. Flake polishing powder and small particle polishing powder have good suspension. Suspension can also be improved by adding a suspending agent. Particle structure: Whether the particle structure is aggregate particles or single crystal particles determines the wear resistance and fluidity of the polishing powder. Aggregate particles break during the polishing process, resulting in a decrease in wear resistance. Monocrystalline grains have good wear resistance and fluidity.
Color: It is related to the praseodymium content and temperature in the raw material. The higher the praseodymium content, the brownish-red color of the polishing powder. Low cerium polishing powder contains a large amount of praseodymium, so it is brownish-red. For pure cerium oxide polishing powder, the baking temperature is high, the polishing powder color is white-red, and the temperature is low, the color is light yellow. The polishing ability of rare earth polishing powder is closely related to the content of cerium oxide and the physical and chemical properties of polishing powder, such as viscosity and chemical activity.