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Polishing powder, polishing liquid for glass and preparation method thereof, glass and electronic product

A technology of polishing powder and polishing liquid, applied in polishing compositions containing abrasives, telephone communication, electrical components, etc., can solve the problems of poor glass surface quality, low polishing liquid processing efficiency, glass surface scratches, etc. Improve polished surface quality, stock removal rate and scratch performance index balance, good surface quality

Inactive Publication Date: 2018-11-23
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application performance of polishing powder on the market mainly focuses on how to increase the polishing rate. The common practice is to increase the particle size of the polishing powder and increase the polishing rate by increasing the mechanical action during the polishing process. However, it is easy to cause Application defects such as scratches on the glass surface and easy sedimentation of the polishing powder after being made into a polishing liquid
At the same time, as the hardness of the glass material becomes harder and harder, the processing efficiency of the general polishing liquid is low, which is easy to cause scratches. The liquid mainly depends on imports, and the cost is relatively high

Method used

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  • Polishing powder, polishing liquid for glass and preparation method thereof, glass and electronic product
  • Polishing powder, polishing liquid for glass and preparation method thereof, glass and electronic product
  • Polishing powder, polishing liquid for glass and preparation method thereof, glass and electronic product

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preparation example Construction

[0052] The preparation process of polishing powder can be carried out by conventional solid phase reaction method or calcination precipitation method.

[0053] Preferably, the preparation method of polishing powder, comprises the steps:

[0054] (1) synthesizing the precursor of lanthanum cerium rare earth polishing powder;

[0055] (2) Carry out fluorination to the above-mentioned precursor, control the addition of fluorine to account for 10-20% of the total amount, and mix uniformly;

[0056] (3) After drying and burning, the semi-finished polishing powder is obtained, and then post-processed.

[0057] Preferably, the precursor of the lanthanum-cerium rare earth polishing powder is a mixture of lanthanum and cerium chlorides, sulfates, nitrates, carbonates or oxides.

[0058] Preferably, the fluoride added to the precursor is one or more of fluorosilicic acid, hydrofluoric acid, ammonium bifluoride, ammonium fluoride, sodium fluoride or potassium fluoride.

[0059] Prefer...

Embodiment 1

[0112] A polishing powder for glass, comprising the following components in mass percentage: 50% of cerium oxide, 30% of lanthanum oxide and 20% of fluorine. Among them, the D50 of the polishing powder for glass is 1.04 μm, the D90 is 2.4 μm, and the Mohs hardness is 7. The number of particles with spherical shape in the polishing powder for glass accounts for 50% of the total number of polishing powder particles.

Embodiment 2

[0114] A polishing powder for glass, comprising the following components in mass percentage: 55% of cerium oxide, 25% of lanthanum oxide and 20% of fluorine. Among them, the D50 of the polishing powder for glass is 1.5 μm, the D90 is 2.4 μm, and the Mohs hardness is 7. The number of particles with spherical shape in the polishing powder for glass accounts for 50% of the total number of polishing powder particles.

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Abstract

The invention discloses polishing powder, a polishing liquid for glass, and a preparation method thereof, glass and electronic products, relates to the technical field of glass polishing. The polishing powder is prepared from 50 to 60% of cerium oxide, 20 to 30% of lanthanum oxide and 10 to 20% of fluorine; D50 of the polishing powder is 1.0 to 1.6 mu m, D90 of the polishing powder is 2.4 to 2.6 mu m, the Moh's hardness is 7 to 8. The polishing liquid is prepared from 50 to 60% of the polishing powder, 0.5 to 1% of a suspension agent, 1 to 10% of a dispersing agent, 1 to 5% of a flatting agent, 1 to 5% of a grinding aid and the balance of water. By controlling the content, particle size distribution and hardness of the polishing powder, high cutting rate can be guaranteed and scratch can be reduced. In addition, through adding the suspension agent, the dispersing agent, the flatting agent and the grinding aid, the suspension, dispersion, leveling and uniformity properties of the polishing powder and the grinding efficiency are improved are improved, the polishing liquid has the advantages of excellent suspension and dispersion properties, high polishing rate and good surface quality.

Description

technical field [0001] The invention relates to the technical field of glass polishing, in particular to a polishing powder for glass, a polishing liquid and a preparation method thereof, glass and electronic products. Background technique [0002] The glass cover plates of electronic products such as mobile phones, tablet computers and liquid crystal displays need to be processed by chemical mechanical polishing to achieve surface flattening and improve surface finish. With the increasing popularity of electronic products, the market demand for high-precision and high-quality glass wafers is increasing day by day, and the requirements for flattening and smoothness of the glass surface are also gradually increasing, which puts forward higher technical requirements for glass surface polishing. [0003] As an important polishing material, polishing powder directly determines the polishing quality of the glass surface. Polishing powder polishes the glass through its mechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02B24B1/00H04M1/02
CPCB24B1/00C09G1/02H04M1/0283
Inventor 周群飞许立军
Owner LENS TECH CHANGSHA
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