Properties and Applications of Rare Earth Polishing Powder

         Zhongsen Editor          2019-09-04

 Granularity of cerium oxide in rare earth polishing powder: cerium oxide with larger particle size, the greater the grinding force, the more suitable for harder materials, ZF glass should use fine polishing powder.It should be noted that all the particle size of cerium oxide has a distribution problem. The average particle size or the median diameter D50 only determines the speed of polishing, and the maximum particle size Dmax determines the polishing precision.Therefore, in order to obtain high precision requirements for rare earth polishing powder, it is necessary to control the maximum particle size of the polishing powder.

Basic requirements for polishing powder
1. The particle size of the fine powder is uniform and within the allowable range;
2. High purity, free of mechanical impurities;
3. It has good dispersibility and adsorption to ensure the uniformity and high efficiency of the processing. The LBD-1 dispersant can be added in an appropriate amount to increase the suspension rate.
4. The powder particles have a certain lattice shape and form sharp sharp corners when broken to improve polishing efficiency;
5. Has the right hardness and density, and water has good wettability and suspension, because the polishing powder needs to be mixed with water.

Polishing powder hardness:
The true hardness of the polishing powder is related to the material. For example, the hardness of cerium oxide is about 7 Mosh hardness, and all kinds of cerium oxide are similar.However, different oxidized ceriums give different feelings of hardness. The rare earth polishing powder is because the cerium oxide polishing powder is usually agglomerated, and the drawing is an electron micrograph of a polishing powder agglomerate.Since the the difference in firing temperature,the strength of the agglomerates is different ,so there is a feeling that the hardness is different when used.Of course, some hardening materials such as alumina are added to the polishing powder, and the grinding rate and wear resistance are improved.

Polishing powder application:
Polishing powder has excellent chemical and physical properties, so it has been widely used in industrial product polishing, such as various optical glass devices, television picture tubes, optical glasses, oscilloscope tubes, flat glass, semiconductor wafers and Polishing of metal precision products, etc.

Polishing powder effect:
The polishing powder has the advantages of high polishing speed, high smoothness and long service life, and has the advantages of not polluting the environment and being easily removed from the stain compared with the conventional polishing powder-iron red powder.Polishing the lens with cerium oxide polishing powder, the amount of work done in one minute, if using iron oxide polishing powder, it takes 30 to 60 minutes.Therefore, the rare earth polishing powder has the advantages of a small amount, a high polishing speed, and a high polishing efficiency. And can change the polishing quality and operating environment.General rare earth glass polishing powder mainly uses cerium-rich oxide.Cerium oxide is an extremely effective polishing compound because it can polish glass simultaneously in both chemical and mechanical friction forms.Rare earth strontium polishing powder is widely used for polishing of cameras, camera lenses, television picture tubes, spectacle lenses, and the like.