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Efficient glass polishing powder and preparation method thereof

A technology of polishing powder and glass, which is applied in the direction of polishing compositions containing abrasives, etc. It can solve the problems of poor dispersion stability of polishing powder and low polishing efficiency, and achieve stable polishing effect, good dispersion stability and strong suspension

Active Publication Date: 2012-08-22
JIANGSU SINO KRYSTALS OPTROINCS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor dispersion stability and low polishing efficiency of existing polishing powders, the invention provides a high-efficiency glass polishing powder and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation method:

[0023] Weigh 5 kg of white mixed lanthanum cerium carbonate (rare earth oxide content 45%wt), add it to 5 kg of water, stir evenly at room temperature, and make a suspension.

[0024] Add 450 grams of manganese nitrate to the suspension, stir well, and make a mixed suspension containing manganese, lanthanum and cerium carbonate. Under the condition of stirring, adjust the pH to 10 with sodium hydroxide, then let it stand for precipitation, pour off the liquid, dry the solid in an oven at 120°C, and break it.

[0025] The dried and crushed solid powder was calcined at 960° C. for 12 hours to obtain dark red lanthanum cerium oxide polishing powder.

Embodiment 2

[0029] 1. Preparation method:

[0030] Weigh 5 kg of white mixed lanthanum cerium carbonate (rare earth oxide content 45%wt), add it to 5 kg of water, stir evenly at room temperature, and make a suspension.

[0031] Add 15 grams of manganese nitrate to the suspension and stir well to make a mixed suspension containing manganese, lanthanum and cerium carbonate. Under the condition of stirring, adjust the pH to 10 with sodium hydroxide, then let it stand for precipitation, pour off the liquid, dry the solid in an oven at 120°C, and break it.

[0032] The dried and crushed solid powder was calcined at 960° C. for 12 hours to obtain dark red lanthanum cerium oxide polishing powder.

[0033] 2. Application examples:

[0034] After the dark red lanthanum cerium oxide polishing powder was uniformly dispersed in water at a ratio of 1:6, it was polished and tested on a Logitech CDP single-side polishing machine. Down pressure: 1psi, the rotation speed of the lower plate and the carr...

Embodiment 3

[0036] 1. Preparation method:

[0037] Weigh 5 kg of white mixed lanthanum cerium carbonate (rare earth oxide content 45%wt), add it to 5 kg of water, stir evenly at room temperature, and make a suspension.

[0038] Add 45 grams of ferric nitrate to the suspension, stir well, and make a mixed suspension containing manganese, lanthanum and cerium carbonate. Under the condition of stirring, adjust the pH to 10 with sodium hydroxide, then let it stand for precipitation, pour off the liquid, dry the solid in an oven at 120°C, and break it.

[0039] The dried and crushed solid powder was calcined at 920° C. for 12 hours to obtain milky yellow lanthanum cerium oxide polishing powder.

[0040] 2. Application examples:

[0041] After the milky yellow lanthanum cerium oxide polishing powder was uniformly dispersed in water at a ratio of 1:6, it was polished and tested on a Logitech CDP single-side polishing machine. Down pressure: 1psi, rotation speed of the bottom plate and carrier...

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PUM

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Abstract

The invention relates to the technical field of a mixed rare-earth oxide and a preparation process thereof and particularly relates to efficient glass polishing powder and a preparation method thereof. The polishing powder comprises a rare-earth oxide, wherein the rare-earth oxide comprises a lanthanum oxide or a cerium oxide; and a crystal lattice of the rare-earth oxide contains a non-rare-earth element catalyst with a lower oxidation-reduction potential. The polishing powder further contains metal ions. The product disclosed by the invention has the advantages of strong suspension, difficulty of depositing, good dispersion stability, stable polishing effect, low surface defects and no scratches formed by polishing; the flattened polishing efficiency can be effectively improved and the polishing efficiency can reach to 1300 nanometers / minute; and damage to a polishing machine is not easy to cause.

Description

technical field [0001] The invention relates to the technical field of mixed rare earth oxides and their preparation process, in particular to a high-efficiency glass polishing powder and a preparation method thereof. Background technique [0002] The polishing principle of rare earth polishing powder is comprehensively described in Cook's treatise. The polishing mechanism of rare earth oxides comes from the fact that rare earths have chemical teeth. During the polishing process, the chemical action between water, polishing agent, polishing mold material and glass shows excellent polishing effect; some people think that rare earth oxide polishing is purely mechanical. The theory is that polishing is the continuation of the grinding process; others believe that rare earth oxide polishing is a frictional heat that causes plastic deformation and flow on the glass surface, or heat softening so that it melts and produces flow. The polishing process is the redistribution of molecu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02
Inventor 孙韬周涛
Owner JIANGSU SINO KRYSTALS OPTROINCS
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