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Production process of nano spherical grape-shaped lanthanum oxide cerium rare earth polishing powder

A rare earth polishing powder, lanthanum cerium oxide technology, applied in the directions of nanotechnology, nanotechnology, rare earth metal compounds, etc., can solve the problems of irregular appearance and shape of lanthanum cerium oxide rare earth polishing powder, decreased precision, irregular product surface, etc. To achieve the effect of not easy to deep scratch, improve surface accuracy, high surface finish

Inactive Publication Date: 2013-04-03
ANYANG JINSHI ABRASIVE MATERIALS
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the current production and operation process has short reaction time, rapid crystallization, and disordered lattice arrangement, resulting in irregular appearance and shape of the finished product of lanthanum oxide rare earth polishing powder, and the surface of the product ground by irregular abrasive materials is also irregular.
During the polishing process, the surface finish of the polished body decreases, the precision decreases, and it is easy to cause deep scratches

Method used

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  • Production process of nano spherical grape-shaped lanthanum oxide cerium rare earth polishing powder

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Embodiment Construction

[0007] Industrial pure water dissolves the rare earth chloride raw material and the reactant ammonium bicarbonate separately, and adds an acid co-reactant (such as: hydrochloric acid, silicic acid, sulfuric acid, etc.) to control the pH value of 3.5-4; When the alkaline reactant ammonium bicarbonate is processed, the concentration of the alkaline reactant is controlled at 10%-35%. The concentration of the dissolved rare earth raw material REO (total amount of rare earth) is controlled at 120-160 g / L, filtered, and added to the parent compound preparation device ∮ 2000-8.5, heated and stirred with steam, and the temperature is controlled between 30°C-60°C , add hydrofluoric acid, when the amount of hydrofluoric acid in the parent compound preparation device ∮ 2000-8.5 reaches 6.5-8% of the total amount of REO in the preparation device, the hydrofluoric acid injection is completed; to the parent compound preparation device Add dispersant and ammonium bicarbonate, control the sti...

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Abstract

The invention discloses a production process of nano spherical grape-shaped lanthanum oxide cerium rare earth polishing powder, which adopts the technical scheme that the process comprises the steps of dissolving a chlorination rare earth raw material with water, adding an acidic catalyst, placing in a parent compound preparation device to be heated, adding hydrofluoric acid, adding a disperser and a liquid alkaline reagent in a reactant in the preparation device, transforming a fluorination crystal lattice for a certain time, conveying into a press filter to be dehydrated, dried, roasted and cooled, sieving, smashing, and packaging into a finished product. The production process has the benefits that the process is simple in operating method, and good in feasibility and effect. With the adoption of the nano spherical grape-shaped lanthanum oxide cerium rare earth polishing powder produced by the process, the surface accuracy of a grinded body can be greatly improved, deep scratches are difficult to generate, the surface smoothness is high, and requirements of high speed polishing of medium softer precision optics such as high-grade optic lenses, a liquid crystal display and an IC (integrated circuit) photographic mask on the smoothness are particularly met.

Description

technical field [0001] The invention relates to the control of the dissolved concentration of raw materials, the control of the pH value after the addition of the alkaline reactant and the addition of the acidic reactant, the stirring line speed and the fluorination lattice time when making the nano-scale spherical grape-like lanthanum cerium oxide rare earth polishing powder aspects of the production process. technical background [0002] The currently recognized production operation process is that when the raw material rare earth chloride is dissolved, the dissolved concentration is not controlled, and the basic reactant (such as: ammonium 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 reactor reaches 6.5-7, the reaction ends, and after the reaction is completed, it is directly dehydrated and dried. However, the current production and operation process has short reaction time, rapid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00C09G1/02
Inventor 张海水
Owner ANYANG JINSHI ABRASIVE MATERIALS
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