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A samarium-containing cerium-based polishing powder and its preparation process

A preparation process and polishing powder technology, which is applied in the direction of polishing compositions containing abrasives, other chemical processes, chemical instruments and methods, etc., can solve the problems of resource backlog, low value of samarium element, and inability to form market sales, etc., to achieve pollution Small, uniform crystal grains, easy for industrial production

Active Publication Date: 2020-06-26
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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  • A samarium-containing cerium-based polishing powder and its preparation process
  • A samarium-containing cerium-based polishing powder and its preparation process
  • A samarium-containing cerium-based polishing powder and its preparation process

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

A samarium-containing cerium-based polishing powder, its composition in molar ratio: Sm 2 o 3 / TREO: 1.4×10 ‑4 ‑2.9×10 ‑2 ,Nd 2 o 3 / TREO:2.97×10 ‑4 ‑7.43×10 ‑3 , the balance being CeO 2 / TREO. The cerium-based polishing powder uses samarium-containing rare earth salt solution as the main raw material, is synthesized by co-precipitation, and fluorine-containing mixed precipitant, and is obtained through washing, filtering, calcining, crushing and grading. The invention introduces samarium element into the rare earth raw material, so that the edges and corners of the obtained cerium-based rare earth polishing powder are sharper, the crystal grains are uniform and compact, and the surface precision is ensured, and the grinding efficiency and recycling performance are good. At the same time, it has the advantages of simple preparation process, wide source of raw materials 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 Patents(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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