Sm-containing Ce based polishing powder and preparation technology thereof

A technology for preparing technology and polishing powder, which is applied in the direction of polishing compositions containing abrasives, other chemical processes, chemical instruments and methods, etc., can solve the problems of low value of samarium element, failure to form market sales, resource backlog, etc., and achieve crystal Uniform particles, convenient for industrial production, and less pollution

Active Publication Date: 2018-01-19
甘肃稀土新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-purity samarium elements are not only low in value but also unable to form market sales, resulting in a large backlog of resources

Method used

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  • Sm-containing Ce based polishing powder and preparation technology thereof
  • Sm-containing Ce based polishing powder and preparation technology thereof
  • Sm-containing Ce based polishing powder and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The rare earth compound is prepared as a salt solution, and the composition of the salt solution is calculated as Sm in molar ratio 2 o 3 / TREO=0.0086,Nd 2 o 3 / TREO=0.0021, the balance is CeO 2 / TREO=0.559, the molar concentration of the salt solution is 1.16mol / L. Add 1m into the reaction vessel 3 water, and add 100L rare earth salt solution, the diluted salt solution is used as the reaction bottom liquid, so that the molar concentration of the rare earth salt solution as the bottom liquid is 0.12mol / l; prepare the ammonium bicarbonate solution, and adjust the bicarbonate concentration to be the rare earth salt solution 3.5 times the molar concentration. Raise the temperature of the liquid in the reaction vessel to 40°C, and at the same time add the rare earth salt solution and the precipitating agent into the reaction vessel, the flow ratio of the rare earth salt solution and the precipitating agent is 1:1. After adding 400L of the rare earth salt solution, sto...

Embodiment 2

[0029] The rare earth compound is prepared as a salt solution, and the composition of the salt solution is calculated as Sm in molar ratio 2 o 3 / TREO=0.00014,Nd 2 o 3 / TREO=0.0021, the balance is CeO 2 / TREO=0.577, the molar concentration of the salt solution is 1.74mol / L. Add 1m into the reaction vessel 3 water, and add 100L rare earth salt solution, the diluted salt solution is used as the reaction bottom liquid, so that the molar concentration of the rare earth salt solution as the bottom liquid is 0.15mol / l; prepare the ammonium bicarbonate solution, and adjust the bicarbonate concentration to be the rare earth salt solution 3.16 times the molar concentration. Raise the temperature of the liquid in the reaction vessel to 45°C, and at the same time add the rare earth salt solution and the precipitating agent into the reaction vessel, the flow ratio of the rare earth salt solution and the precipitating agent is 1:2. After adding 400L of the rare earth salt solution, s...

Embodiment 3

[0031] The rare earth compound is prepared as a salt solution, and the composition of the salt solution is calculated as Sm in molar ratio 2 o 3 / TREO=0.029,Nd 2 o 3 / TREO=0.00743, the balance is CeO 2 / TREO=0.508, the molar concentration of the salt solution is 1.25mol / L. Add 1m into the reaction vessel 3 water, and add 100L rare earth salt solution, the diluted salt solution is used as the reaction bottom liquid, so that the molar concentration of the rare earth salt solution as the bottom liquid is 0.17mol / l; prepare the ammonium bicarbonate solution, and adjust the bicarbonate concentration to be the rare earth salt solution 3.0 times the molar concentration. Raise the temperature of the liquid in the reaction vessel to 45°C, and at the same time add the rare earth salt solution and the precipitating agent into the reaction vessel, the flow ratio of the rare earth salt solution and the precipitating agent is 1:1. Stop adding the rare earth salt solution after adding ...

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Abstract

The invention provides Sm-containing Ce based polishing powder. The Sm-containing Ce based polishing powder comprises components in a molar ratio as follows: 1.4*10<-4>-2.9*10<-2> of Sm2O3/TREO, 2.97*10<-4>-7.43*10<-3> of Nd2O3/TREO and the balance of CeO2/TREO. According to the Sm-containing Ce based polishing powder, a Sm-containing rare-earth salt solution is taken as a main raw material, a mixed precipitant is applied to synthesis in a co-precipitation manner, a product is subjected to washing, filtering, calcination and breaking classification, and the Sm-containing Ce based polishing powder is obtained. Sm is added to the rare-earth raw material, so that the obtained Ce based rare earth polishing powder has sharper corner angle and uniform and compact crystalline grains and has better grinding efficiency and recycling performance while surface precision is guaranteed. Meanwhile, the Sm-containing Ce based polishing powder has the advantages that the preparation technology is simple, raw materials are widely sourced and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of rare earth materials, in particular to a samarium-containing cerium-based polishing powder and a preparation process thereof. Background technique [0002] Cerium-based abrasives are widely used as abrasive materials for glass materials. Especially in recent years, the field of electrical and electronic equipment such as mobile phone glass, liquid crystal display (LCD), and photomask has grown rapidly, and the demand for polishing materials for their glass substrates has increased. With the continuous development of manufacturing technology in the industry, higher grinding speed and better surface accuracy are required for the grinding of substrates and other glass. At the same time, abrasive materials are required to have high recycling performance and reduce environmental problems that may be caused by fluorine. [0003] Patent CN1O1356248 discloses a production process using cerium car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02C09K3/14
Inventor 魏其东李虎平姜霁涛牛娟娟史俊龙蒋春虎马相琴
Owner 甘肃稀土新材料股份有限公司
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