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Samarium cerium rare earth polishing powder and preparation method thereof

A technology of rare earth polishing powder and polishing powder, which is applied in the direction of chemical instruments and methods, and other chemical processes, which can solve problems such as adverse reactions, skin irritation of polishing operators, and unfavorable health of operators, so as to achieve improved performance and excellent service life , Excellent cleaning effect

Active Publication Date: 2019-08-23
淄博包钢灵芝稀土高科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the polishing process, the rare earth polishing powder will undergo complex physical and chemical reactions with the glass. The alkaline earth metal oxides, silicon oxide, aluminum oxide in the glass and the chemical components of lanthanum oxide, cerium oxide, and praseodymium oxide in the rare earth polishing powder will occur Hydrolysis, leading to an increase in the pH value of the polishing slurry system, thereby irritating the skin of the polishing operator and causing adverse reactions
As far as rare earth polishing powder is concerned, lanthanum oxide has the strongest alkalinity, so the more lanthanum oxide it contains, the more the pH value will increase due to hydrolysis during the polishing process, which is not conducive to the health of operators

Method used

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  • Samarium cerium rare earth polishing powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0043] According to the distribution of rare earth Sm 2 o 3 / TREO=20.13%, CeO 2 / TREO=79.86%, Other REO / TREO<0.01% Take a mixture of samarium carbonate and cerium carbonate, and precipitate according to the following steps:

[0044] (1) Get the mixture of 500 kilograms of samarium carbonate and cerium carbonate, add in the blender.

[0045] (2) Spray 56 kilograms of hydrofluoric acid into it, and release it after stirring evenly.

[0046] (3) The obtained product is dried on a roller kiln, the temperature is controlled to rise from 80 to 600° C., and continuously fired, and kept at 980° C. for 7 hours.

[0047] (4) Carry out gas powder and classification then, obtain the polishing powder 314 kilograms that particle size is D50: 1.05 μ m, D100: 4.69 μ m.

[0048] (5) A polishing powder sample is obtained after mixing in the suspending and dispersing agent LS-1, marked as SC-2.

[0049] The polishing comparison experiment was carried out on the RL-13B polishing machine, and...

Embodiment 3

[0051] Get 50 kilograms of samarium oxide and 50 kilograms of cerium oxide (both samarium oxide and cerium oxide are produced by Zibo Baotou Steel Ganoderma Lucidum Rare Earth High-Tech Co., Ltd.), and precipitate according to the following steps successively:

[0052] (1) Put 50 kg of samarium oxide and 50 kg of cerium oxide into the stirring mill and grind for 5 minutes.

[0053] (2) Add 20 kg of ammonium bifluoride and continue grinding for 20 minutes.

[0054] (3) Separate the ground product, and dry it on a roller kiln, control the temperature from 100°C to 500°C, and continuously burn it, and keep it at 950°C for 10 hours.

[0055] (4) Carry out gas powder and classify then, obtain particle size and be D50: 0.92 μ m, D100: 91 kilograms of the polishing powder of 4.53 μ m.

[0056] (5) The polishing powder sample is obtained after mixing the suspending agent LS-1, marked as SC-3.

[0057] The polishing comparison experiment was carried out on the RL-13B polishing machin...

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Abstract

The invention relates to samarium-cerium rare earth polishing powder and a preparation method thereof. The samarium-cerium rare earth polishing powder comprises the following ingredients in percentageby weight: 50%-98% of cerium oxide and 2%-50% of samarium oxide; a precursor is a mixture formed by chlorides, sulfate, nitrate, carbonate or oxides of samarium and cerium. Moreover, the invention provides the preparation method of the samarium-cerium rare earth polishing powder. The samarium-cerium rare earth polishing powder prepared by the method is used for a polishing experiment on an RL-13Bpolisher, the polishing rate of the samarium-cerium rare earth polishing powder is higher than that of normal lanthanum-cerium polishing powder by about 30%, the polishing yield of the samarium-cerium rare earth polishing powder is the same as that of comparative lanthanum-cerium polishing powder, the degree of easy cleaning of glass is better than that of other rare earth polishing powder, and the service life is longer than that of other rare earth polishing powder. According to the method, the samarium-cerium rare earth polishing powder is prepared, so that the purpose of exploiting application of the samarium oxide is achieved; and besides, the advantages of the samarium oxide in the rare earth polishing powder, which are better than the advantages of lanthanum oxide, are utilized, and therefore, the property of the polishing powder is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of rare earth materials, and in particular relates to a samarium cerium rare earth polishing powder and a preparation method thereof. Background technique [0002] my country's rare earth polishing powder is currently divided into three categories, one is pure cerium rare earth polishing powder, the other is lanthanum cerium rare earth polishing powder, and the third is lanthanum cerium praseodymium rare earth polishing powder. When used for glass polishing, the three types of polishing powder have their own advantages and disadvantages. Pure cerium rare earth polishing powder has higher precision, but the polishing rate is not as good as the other two types; Easy to clean; lanthanum cerium rare earth polishing powder is in between. [0003] When the price of the above-mentioned rare earth polishing powder fluctuates in the rare earth market, its price also fluctuates greatly, which brings large cost fluctu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14
Inventor 李炳伟牟元璋彭欢董云王德兴龚丽华
Owner 淄博包钢灵芝稀土高科技股份有限公司