Rare earth polishing powder refers to the mixed light rare earth oxide powder with ceria as the main component to improve the surface finish of products or parts. Usually, bastnaesite concentrate (containing RE2O3 ≥ 70%) or soluble rare earth salt (containing CeO2 / RE2O3 = 45% ~ 50% rare earth chloride or CeO2 & gt; 80% cerium rich rare earth compound) is used as raw materials, which is made into processes such as treatment, combustion, crushing and screening through chemical process The polishing ability of rare earth polishing powder is closely related to the content of ceria, the viscosity and chemical activity of the polishing powder. Generally, rare earth polishing powder with high ceria content has strong polishing ability, but high cerium rare earth polishing powder is expensive, and low cerium rare earth polishing powder is widely used. In the process of preparing rare earth polishing powder, additives containing fluorine and sulfate are usually added to produce fluoride and sulfate. Rare earth polishing powders containing fluoride and sulfate generally have good polishing properties. For example, the average content of cerium oxide in xp-771 and xp-cf rare earth polishing powders commonly used in China is only 50%, but both contain fluoride and sulfate
