Manufacturing process of lanthanum oxide cerium rare-earth polishing powder

Abstract

The invention discloses a manufacturing process of lanthanum oxide cerium rare-earth polishing powder. The manufacturing process adopts the technical scheme that the manufacturing process comprises the steps that a rare earth chloride raw material is dissolved by water; an acid reaction assistant is added; after the rare earth chloride raw material is dissolved, a filtered solvent is put into a parent compound preparing device to be heated; liquid alkaline reactant is added in a dripping manner; when a certain PH value is reached, adding is completed; fluorinated crystal lattices in the preparing device after being transformed for a certain time are sent to a press filter for dehydration, dryout, calcination and cooling; and then the fluorinated crystal lattices are sieved, smashed, and packaged into a finished product. The manufacture process has the benefits that the process is simple in operation method, good in feasibility, and good in effect. The shape of the polishing powder manufactured with the method can improve the accuracy of a ground surface largely, and does not cause deep scratching; the surface smoothness is high; and the requirement of a large area liquid crystal screen on the smoothness is met.

Description

technical field [0001] The invention relates to a production process for controlling the dissolution of raw materials, the addition of alkaline reactants and acid co-reactants and the reaction time when producing nano-scale lanthanum cerium oxide rare earth polishing powder. technical background [0002] The currently recognized production process is that when the raw material rare earth chloride is dissolved, the pH value is not controlled, and the alkaline reactant (such as: sodium bicarbonate) is added as a solid one-time addition, and the reaction temperature is controlled at 30°C-- 45°C, when the pH value in the parent compound preparation device reaches 6.5-7, the reaction ends, and after the reaction is completed, it is directly dehydrated and dried. However, in the current production process, the reaction time is fast, the crystallization is rapid, and the crystal lattice is disordered, resulting in irregular shape of the finished product of lanthanum cerium oxide ra...

AI Technical Summary

Problems solved by technology

However, in the current production process, the reaction time is fast, the crystallization is rapid, and the crystal lattice is disordered, resulting in irregular shape of the finished product of lanthanum cerium oxide rare earth polishing powder. deep scratch

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