A kind of surface modification method of superfine diamond powder

A diamond micropowder and surface modification technology, applied in chemical instruments and methods, polishing compositions containing abrasives, other chemical processes, etc., can solve the problems of scratching workpieces, affecting the application of ultra-fine diamond micropowder, etc. Speed, the effect of reducing production costs

Active Publication Date: 2018-03-13
CR GEMS SUPERABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Ultrafine diamond micropowder is easy to be agglomerated due to surface electron unsaturation, impurities, moisture, magnetism, static electricity and other factors. During the process of polishing precision workpieces such as semiconductors and optical lenses, there is a phenomenon of scratching the workpiece, which will affect the quality of ultrafine diamond. Application of Micropowder in the Field of Precision Polishing

Method used

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  • A kind of surface modification method of superfine diamond powder
  • A kind of surface modification method of superfine diamond powder
  • A kind of surface modification method of superfine diamond powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Put the dispersant solution of 0.005mol / L into the mixing mixer with the ultrafine diamond micropowder and the molar concentration, the mass ratio of the dispersant and the ultrafine diamond micropowder in the dispersant solution is 2:1000, and the dispersant is ten Sodium dialkylsulfate, sodium dodecylbenzenesulfonate and polyethylene glycol 2000, the molar ratio is 1:0.15:0.45, the solvent is deionized water, mixed and stirred for 60 minutes, then passed through the solid-liquid separation device, the material filter to remove impurities;

[0038] 2) The wet material of ultrafine diamond powder after impurity removal is dried by a disc dryer at a drying temperature of 150° C. to obtain surface-modified ultrafine diamond powder.

Embodiment 2

[0040] 1) The dispersant solution that the ultrafine diamond micropowder and the molar concentration are 0.002mol / L is placed in the mixing mixer, the mass ratio of the dispersant and the ultrafine diamond micropowder in the dispersant solution is 1:1000, and the dispersant is ten Sodium dialkylsulfate, sodium dodecylbenzenesulfonate and polyethylene glycol 2000, the molar ratio is 1:0.2:0.5, mixed and stirred for 45 minutes, and then filtered through a solid-liquid separation device to remove impurities;

[0041] 2) The wet material of ultrafine diamond powder after impurity removal is dried by a disc dryer at a drying temperature of 120° C. to obtain surface-modified ultrafine diamond powder.

Embodiment 3

[0043] 1) Put the dispersant solution of 0.008mol / L into the mixing mixer with the ultrafine diamond micropowder and the molar concentration, the mass ratio of the dispersant and the ultrafine diamond micropowder in the dispersant solution is 5:1000, and the dispersant is ten Sodium dialkylsulfate, sodium dodecylbenzenesulfonate and polyethylene glycol 2000, the molar ratio is 1:0.25:0.55, the solvent is deionized water, mixed and stirred for 30 minutes, then passed through the solid-liquid separation device, the material filter to remove impurities;

[0044] 2) Dry the ultrafine diamond powder wet material after impurity removal by a disc dryer at a drying temperature of 100° C. to obtain surface-modified ultrafine diamond powder.

[0045] Dispersion effect of disc dryer

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Abstract

The invention discloses a surface modification method of superfine diamond micro-powder. The surface modification method includes the steps of firstly, mixing superfine diamond micro-powder and a dispersing agent solution, performing solid-liquid separation, and filtering to remove impurities; secondly, drying the superfine diamond micro-powder wet material obtained in the first step through a flow drying manner to obtain surface-modified superfine diamond micro-powder. The surface-modified superfine diamond micro-powder is stale in dispersion in a water system, applicable to the polishing of high-end precise products such as semiconductors and optical lenses, high in polishing efficiency, good in polishing quality, free of scratches after polishing, capable of avoiding damage of a to-be-polished workpiece and capable of satisfying the requirements of the current technical field of the high-end precise products.

Description

technical field [0001] The invention relates to a method for surface modification of ultrafine diamond powder, belonging to the technical field of diamond surface modification. Background technique [0002] One of the most important indicators of ultrafine diamond powder is particle size, because the particle size determines many technical properties and practical application range of diamond powder. Since the particle size of diamond powder is small to a certain extent, that is, after the so-called "ultrafine", the powder The specific surface area and the number of surface particles increase sharply, and its activity is higher than that of the internal particles. Therefore, the ultrafine powder has a large adsorption capacity, as well as unique electrical and magnetic properties. [0003] Ultrafine diamond micropowder is easy to be agglomerated due to surface electron unsaturation, impurities, moisture, magnetism, static electricity and other factors. During the process of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/44C09C1/68C09C3/08C09C3/10C09K3/14C09G1/02
CPCC09C1/44C09C3/08C09C3/10C09K3/1409
Inventor 温简杰盛友军李杰
Owner CR GEMS SUPERABRASIVES
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