Introduction To The Properties Of Rare Earth Polishing Powder And The Use Space

The particle size of cerium oxide in rare earth polishing powder: the larger the particle size of cerium oxide, the greater the grinding force, the more suitable for harder materials, and ZF glass should use finer polishing powder. It should be noted that the particle size of all cerium oxides has a distribution problem, the size of the average particle size or median diameter D50 only determines the speed of polishing, and the maximum particle size Dmax determines the level of polishing accuracy. Therefore, in order to obtain high precision requirements for rare earth polishing powder, the maximum particle size of polishing powder must be controlled.
The basic requirements of polishing powder
(1) The particle size of the powder is uniform and consistent, within the allowable range;
(2) It has high purity and does not contain mechanical impurities;
(3) It has good dispersion and adsorption to ensure the uniformity and efficiency of the processing process, and LBD-1 dispersant can be added to improve the suspension rate;
(4) The powder particles have a certain lattice morphology, and sharp sharp corners are formed when crushed to improve the polishing efficiency;
(5) It has the right hardness and density, and has good wettability and suspension with water, because the polishing powder needs to be mixed with water
Hardness of polishing powder:
The true hardness of polishing powder is related to the material, such as the hardness of cerium oxide is about 7 on the Mohs scale, and all kinds of cerium oxide are about the same. However, different cerium oxide bodies give people different hardness, rare earth polishing powder is because cerium oxide polishing powder is usually agglomerate, and the attached picture is an electron microscope photo of a polishing powder agglomerate. The strength of the aggregates varies depending on the firing temperature, so the hardness feels different when used. Of course, some polishing powders add harder materials such as alumina, and the grinding rate and wear resistance will be improved.