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Diamond polishing paste in high purity, and preparation method

A nano-diamond, high-purity technology, applied in chemical instruments and methods, polishing compositions containing abrasives, other chemical processes, etc., can solve the problems of inability to precisely process the inner hole of the ceramic ferrule of optical fiber connectors, low viscosity, etc. Achieve the effects of good dispersion stability and rheological properties, good wetting effect, and high polishing efficiency

Inactive Publication Date: 2009-09-02
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low viscosity of the existing grinding and polishing liquid, it cannot be used for precision machining of the inner hole of the ceramic ferrule of the optical fiber connector, and the key technology for processing the inner hole of the ceramic ferrule of the optical fiber connector is still controlled by foreign companies
The polishing paste used in polishing is mainly imported from Japan, and there is no relevant domestic research report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 0.5g of diamond micropowder with a purity of 99.9% (with a particle size distribution of 100-200nm), add 5g of 1,4-butanediol, stir, and sonicate for 8 minutes to fully wet it. Add 0.3g of nonylphenol polyoxyethylene ether (OP-10) and 68.9g of glycerin to form a mixed solution. Add 25g of heated and dissolved polyethylene glycol to the mixed solution, stir it evenly, and sonicate for 10 minutes. Adjust the pH to 8 with triethanolamine, stir for 30 minutes, and then sonicate for 10 minutes to obtain a high-purity nano-diamond polishing paste. The polishing paste can be stored stably for 6 months, with a high shear viscosity of 4800mpa.s and a low shear viscosity of 8500mpa.s.

Embodiment 2

[0038] Take 2g of diamond micropowder with a purity of 99.9% (with a particle size distribution of 100-200nm), add 20g of ethanol, stir, and sonicate for 20 minutes to fully wet it. Add 1g of sorbitan fatty acid ester polyoxyethylene ether, add 31g of glycerin to form a mixed solution, then add 45g of polyvinyl alcohol that has been heated and dissolved, and stir while adding for 30 minutes. Add ethanolamine to adjust the pH to 9, and shear at a high speed of 10000r / min for 30min to obtain a high-purity nano-diamond polishing paste. The polishing paste can be stored stably for 6 months, with a high shear viscosity of 5800mpa.s and a low shear viscosity of 10500mpa.s.

Embodiment 3

[0040] Take 5g of diamond micropowder with a purity of 99.9% (with a particle size distribution of 100-200nm), add 1g of stearic acid, and ultrasonicate for 5 minutes to fully wet it. Add 0.5g of mannose and 68g of glycerin to form a mixed solution, then add 25g of polyoxypropylene polyoxyethylene block polyether, and stir for 60 minutes while adding. Add ammonia water to adjust the pH to 8, and mechanically stir for 30 minutes to obtain a high-purity nano-diamond polishing paste.

[0041]The high-purity diamond polishing paste prepared by Example 3 was stored for 6 months without sedimentation, and its high-shear viscosity was 6500mpa.s, and the low-shear viscosity was 9500mpa.s. Use this polishing paste to polish the surface of the micro inner hole of the ceramic ferrule of the optical fiber connector. There are no slip marks or black spots on the inner hole surface. After testing, the insertion loss and return loss meet the national standard requirements.

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PUM

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Abstract

This invention relates to a method for preparing polishing paste containing high-purity nanoscale diamond for precision polishing of the small inner pores of ceramic ferrule used in optical fiber connector. The polishing paste is prepared from: diamond micropowder 0.05-5 wt.%, wetting agent 0.01-25 wt.%, surfactant 0.1-5 wt.%, dispersion stabilizer 0.1-50 wt.%, pH regulator 0.1-1 wt.%, and glycerol 14-99.64 wt.%. The purity of the diamond micropowder is greater than or equal to 99.9%, and the particle sizes are 100-200 nm. The polishing paste is amphipathic, and has such advantages as high polishing speed, high dispersion stability, and appropriate viscosity. The polishing paste can effectively prevent the generation of small inner pores on the surface of polished ceramic ferrule.

Description

technical field [0001] The invention relates to a high-purity nano-diamond polishing paste for ultra-precision polishing on the surface of the inner hole of a ceramic ferrule of an optical fiber connector, belonging to the technical field of ultra-precision polishing on the inner surface of a microhole. Background technique [0002] In order to improve the surface quality of the inner hole of the ceramic ferrule of the optical fiber connector, foreign scholars, especially Japanese scholars, have conducted a lot of research on this. The current research in China mainly focuses on the ultra-fine grinding and polishing of the end face and outer surface of the optical fiber connector, while the research on the precision polishing of the inner hole of the ferrule is rarely involved. The surface finish and processing accuracy of the inner hole of the ferrule directly determine the optical performance of the fiber optic connector - insertion loss and return loss. If the flatness o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09G1/02G02B6/38
CPCC09K3/1481C09G1/02
Inventor 靳洪允侯书恩潘勇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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