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Water diamond lapping liquid and its preparation method and use

A technology for grinding fluid and diamond, applied in the field of water-based diamond grinding fluid and its preparation, can solve the problems of poor uniformity of the grinding fluid system, affecting the polishing quality and efficiency, high density of diamond fine powder, etc., and achieves good dispersion, low cost and stability. shelf life effect

Inactive Publication Date: 2008-05-28
BEIJING GRISH HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of diamond micropowder is high, the smaller nano-sized particles are easy to agglomerate, and the larger micron-sized particles are easy to precipitate, resulting in poor uniformity of the entire grinding fluid system, which affects the polishing quality and efficiency.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0043] The preparation process of the grinding liquid is carried out successively according to the following procedures:

[0044] (1) Pretreating the suspending agent first: preparing the suspending agent into an aqueous solution with a certain concentration for later use, wherein the mass percentage of the suspending agent is 1-30%.

[0045] (2) Take an appropriate amount of organic solvent, and add a corresponding amount of diamond micropowder thereinto.

[0046] (3) add suspending agent and deionized water standby in advance by the mass proportion described in claim 1, and manually stir, make all ingredients mix.

[0047] (4) Disperse the above mixed liquid evenly. The dispersion method can be one or a combination of mechanical stirring, ultrasonic oscillation, mechanical grinding and ball milling.

[0048](5) After dispersing for a certain period of time, add a corresponding dispersion stabilizer to the mixed liquid, continue to disperse for a certain period of time, and...

Embodiment 1

[0053] Embodiment 1: Saponified polyvinyl alcohol was formulated into an aqueous solution with a mass concentration of 15%, and left to stand for 24 hours for subsequent use. Take a beaker, add 40g glycerin to it, and then add 2g to it, the particle size distribution is 0.841-3.986μm, D 50 2.863 μm single crystal diamond micropowder, and 10 g of saponified polyvinyl alcohol aqueous solution with a mass concentration of 15% was added thereto, and then 45 g of deionized water was added thereto. The mixed solution was stirred and dispersed with a high-speed stirrer, and after 10 minutes, 2 g of sodium hexametaphosphate was added to the mixed solution, and the stirred and dispersed solution was continued for 15 minutes. Then add 0.5g of 30% ammonia water therein, adjust the pH value between 9-10, finally add 0.5g tetrachloroisophthalonitrile, then shake well to obtain the water-based grinding liquid with a diamond micropowder content of 2%. .

Embodiment 2

[0054] Embodiment 2: The organoclay was prepared into an aqueous solution with a mass concentration of 15%, and it was left to stand for a week for subsequent use. Take a beaker, add 40g of ethanol to it, and then add 1.5g of it with a particle size distribution of 0.232-1.854μm, D 50 1.006 μm single crystal diamond micropowder, and 10 g of organic clay aqueous solution with a mass concentration of 15% was added thereto, and then 45 g of deionized water was added thereto. Stir and disperse the mixed solution with a high-speed agitator. After 10 minutes, add 2.5 g of sodium hexametaphosphate to the mixed solution, and continue stirring and dispersing for 15 minutes. Then add 0.5g of 5% aqueous sodium hydroxide solution therein, adjust the pH value between 9-10, add 0.5g tetrachloroisophthalonitrile at last, fully shake up then and can obtain diamond micropowder content and be 1.5% Aqueous abrasive.

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Abstract

The invention provides aqueous diamond polishing liquid, process for preparation and purpose. The main components are diadust, dispersion stabilizer, suspending agent, pH modifying agent, antiseptic agent, organic solvent and deionized water. The preparing technique of the invention is that organic solvent, diadust, prior prepared suspending agent, deionized water and dispersion stabilizer are mixed, then the mixture is stirred or supersonically dispersed uniformly, finally pH modifying agent and antiseptic agent are added, and the preparation is accomplished after shaking up. The lapping liquid can be widely used in grinding and polishing in various departments and areas of optical instruments, glasses, ceramics, rigid alloy, diamonds, artificial lens, optical fiber, LED display, integrated circuit, semiconductor, hard disk and the like. The lapping liquid can be kept in uniform and stable state, generates no precipitation, delamination or invalidation.

Description

technical field [0001] The invention belongs to the field of precision grinding and polishing, and relates to a polishing liquid for grinding and polishing, in particular to a water-based diamond grinding liquid and its preparation method and application. Background technique [0002] Diamond is currently known as the hardest substance in nature, its relative hardness (Mohs hardness) is 10, and its microhardness (square cone indentation method) is 98588MPa. The absolute hardness of diamond is 1000 times that of quartz and 150 times that of corundum. With its unparalleled high hardness and excellent mechanical and physical properties, diamond has become a tool for processing various hard materials. Diamond micropowder is the hardest ultra-fine abrasive, which has been widely used in machinery, aerospace, optical instruments, glass, ceramics, electronics, petroleum, geology, and military industry. It is an ideal material for high-hard materials such as artificial crystals an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14B24B29/00
Inventor 王宝运许亚杰李晓冬
Owner BEIJING GRISH HITECH
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