Preparation method of lanthanum-cerium modified magnesium oxide composite polishing powder

A composite polishing and magnesium oxide technology, applied in polishing compositions containing abrasives, etc., can solve problems such as consumption, and achieve the effects of saving rare earth resources and reducing production costs

Active Publication Date: 2020-07-03
山东麦丰新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polishing powder is mainly made of rare earth element cerium, and a large amount of cerium is still consumed

Method used

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  • Preparation method of lanthanum-cerium modified magnesium oxide composite polishing powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of lanthanum cerium modified magnesium oxide composite polishing powder, which comprises the steps of:

[0040] S1 Fully mix 95mL of 30g / L magnesium chloride solution and 5mL of lanthanum cerium chloride solution (wherein the concentration of lanthanum chloride is 20g / L, and the concentration of cerium chloride is 20g / L) under the condition of stirring at a temperature of 50°C Add 200mL of a mixed solution of sodium fluoride and sodium hydroxide at a speed of 12L / min for precipitation (wherein the concentration of sodium fluoride is 5g / L and the concentration of sodium hydroxide is 90g / L), age for 16 hours, and filter to obtain fluoride Magnesium hydroxide composite precipitation;

[0041] S2 Composite precipitation of fluorinated magnesium hydroxide, dried at 110°C, put into a sagger and put into a shuttle-type industrial kiln for roasting according to the following roasting curve. ℃, roasting for 8h;

[0042] The second stage: at 420 ° C, heat p...

Embodiment 2

[0048] A preparation method of lanthanum cerium modified magnesium oxide composite polishing powder, which comprises the steps of:

[0049] S1 Fully mix 95mL of 30g / L magnesium chloride solution and 5mL of lanthanum cerium chloride solution (wherein the concentration of lanthanum chloride is 20g / L, and the concentration of cerium chloride is 20g / L) under the condition of stirring at a temperature of 50°C Add 200mL of a mixed solution of sodium fluoride and sodium hydroxide at a speed of 20L / min for precipitation (wherein the concentration of sodium fluoride is 5g / L and the concentration of sodium hydroxide is 90g / L), age for 16 hours, and filter to obtain fluoride Magnesium hydroxide composite precipitation;

[0050] S2 Composite precipitation of fluorinated magnesium hydroxide, dried at 110°C, put into a sagger and put into a shuttle-type industrial kiln for roasting according to the following roasting curve. ℃, roasting for 8h;

[0051] The second stage: at 420 ° C, heat p...

Embodiment 3

[0057] A preparation method of lanthanum cerium modified magnesium oxide composite polishing powder, which comprises the steps of:

[0058] S1 Fully mix 38.8mL of 50g / L magnesium chloride solution and 5mL of lanthanum cerium chloride solution (wherein the concentration of lanthanum chloride is 20g / L, and the concentration of cerium chloride is 20g / L) under the condition of stirring at a temperature of 50°C Add the mixed solution of 200mL sodium fluoride and sodium hydroxide with the speed of 12L / min and carry out precipitation (wherein, sodium fluoride concentration is 5g / L, and sodium hydroxide concentration is 90g / L), aging 16 hours, filter, obtain Fluorinated magnesium hydroxide composite precipitation;

[0059] S2 Composite precipitation of fluorinated magnesium hydroxide, dried at 110°C, put into a sagger and put into a shuttle-type industrial kiln for roasting according to the following roasting curve. ℃, roasting for 8h;

[0060] The second stage: at 420 ° C, heat pre...

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Abstract

The invention belongs to the technical field of polishing powder preparation, and particularly relates to a preparation method of lanthanum-cerium modified magnesium oxide composite polishing powder.The preparation method comprises the following steps: S1, precipitating a mixed solution of magnesium chloride and lanthanum-cerium chloride by taking a fluorine-containing strong alkali solution as aprecipitant, ageing, and filtering to obtain a fluorinated magnesium hydroxide lanthanum cerium eutectic compound; and S2, drying, roasting, screening, crushing and grading the precipitate obtained in the step S1 to obtain the lanthanum-cerium modified magnesium oxide composite polishing powder. The granularity of the polishing powder is 0.8-1.2 [mu]m, the polishing powder meets the use standard(0.6-1.2 [mu]m) in the fields of mobile phone cover plates and TFT liquid crystal panel glass, and after the provided polishing powder replaces the existing polishing powder, the rare earth resource is saved by more than 9000 tons/month.

Description

technical field [0001] The invention belongs to the technical field of polishing powder preparation, and in particular relates to a preparation method of lanthanum-cerium-modified magnesium oxide composite polishing powder. Background technique [0002] The main component of rare earth polishing powder is CeO 2 , because of its unique physical and chemical properties, is widely used in lenses, flat glass, glass shells, glasses, watch cases and other fields. In recent years, functional ceramics, catalysis, luminescence, gas sensors, fuel cells and ultraviolet absorption, etc. has also been widely used. The preparation method of traditional rare earth polishing powder mainly includes two categories: [0003] 1. Solid phase reaction method using rare earth concentrate or cerium concentrate as raw material [0004] The direct preparation of polishing powder from ore can save the complicated chemical extraction process and greatly reduce the production cost. Bastnaesite ore (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02
CPCC09G1/02
Inventor 于长江路朋王兆敏
Owner 山东麦丰新材料科技股份有限公司
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