Rare earth polishing powder and preparation method thereof

Abstract

The invention provides rare earth polishing powder and a preparation method thereof; the rare earth polishing powder is composed of rare earth oxide and aluminium silicate, wherein the rare earth oxide is lanthanum-cerium oxide or lanthanum-cerium-praseodymium oxide; the mass content of the rare earth oxide in the rare earth polishing powder is 66-85%; the rest is aluminium silicate. The rare earth polishing powder disclosed by the invention is prepared by proportioning, ball-milling, drying, roasting and crushing rare earth carbonate and aluminosilicate. Compared with the prior art, fluorine is not introduced into the rare earth polishing powder prepared by the invention; the operation condition in the reaction process is moderate; the rare earth polishing powder has the advantages of being high in polishing and corroding amount and abrasive resistance and the like; and the rare earth polishing powder prepared by the invention has the advantages of being simple in preparation process, free from environmental pollution, low in cost and the like in the production process.

Description

technical field [0001] The present invention relates to a kind of rare earth polishing powder and its preparation method, more precisely, it relates to a kind of cerium-based rare earth compound as raw material, which is prepared by chemical method and applied to the surface of glass substrates and optical glass components of displays and display screens. A fluorine-free cerium-based mixed rare earth polishing powder for polishing treatment and a preparation method thereof. Background technique [0002] Rare earth polishing powder is an important extended product of rare earth products, which has the advantages of fast polishing speed, high finish and long service life. High-precision rare earth polishing materials play a vital role in the liquid crystal display industry due to their advantages of uniform particle size, moderate hardness, high polishing efficiency, good polishing quality, long service life, and environmental protection. One of the key chemicals for developm...

AI Technical Summary

Problems solved by technology

Hard lumps of MIF particles cause scratches

In addition, if unreacted rare earth oxide particles remain, high polishing rates cannot be maintained over a long period of time

[0009] At the same time, in the current preparation process of rare earth polishing powder, due to the introduction of fluorine, whether it is the overflow of hydrogen fluoride in the preparation process or the sublimation of rare earth fluoride in the roasting process, it will cause great pollution to the environment. Processing adds a lot of cost

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