Fine abrasive and its prepn process

A fine grinding and abrasive technology, applied in the field of nano-scale ultra-fine abrasive and its preparation technology, can solve the problems of computer head corrosion, plankton, and restricting the development of the computer industry, and achieve good dispersion stability and uniform distribution Effect

Inactive Publication Date: 2002-01-23
刘麒荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the polishing effect of this magnetic head polishing liquid is not very ideal, and the surface roughness after polishing is greater than 5 angstroms, and there are scratches and particles after the magnetic head is polished, which affects the diamond-like carbon film (DLC) on the surface of the magnetic head, sometimes for high cobalt content The use of these polishing liquids for computer magnetic heads will corrode the computer magnetic heads, and the product cannot be stored for too long, and plankton will appear, which affects the quality and appearance of the polishing liquid, and limits the development of the computer industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The composition and weight of superfine grinding agent are as follows:

[0046] Nano diamond powder 0.1g

[0047] Nonylphenol polyoxyethylene ether-10 1.0g

[0048] Triethanolamine Borated Oleate 0.1g

[0049] Naphtha 98.8g

[0050] Its preparation process is as follows:

[0051] (1) Mechanically grind diamond into powder, ultrasonically disperse it in water to make its weight percentage concentration < 0.5%, add acetic acid pH value regulator to make the pH value of nano diamond powder aqueous solution 6.5-8.5, and then graded and purified to obtain nano diamond powder;

[0052] (2) When the relative air humidity is >85%, dry the pure nano-diamond powder, weigh 0.1g of pure nano-diamond powder, add non-ionic surfactant --- nonylphenol polyoxyethylene ether-10 1.0g, heat it to make it fully react, add 98.8g of near-boiling naphtha, add 0.1g of borated oleic acid triethanolamine and ultrasonically disperse for 20 minutes, then add an appropriate amount of pH regulat...

Embodiment 2

[0054] The composition and weight of the fine grinding agent are as follows:

[0055] Nano diamond powder 0.4g

[0056] Polyoxyethylene octylphenol ether-10 1.2g

[0057] Borated Diethanolamine Oleate 0.1g

[0058] Petroleum ether 98.3g

[0059] Its preparation process is as follows:

[0060] (1) make pure nano-scale diamond powder with embodiment 1 (1);

[0061](2) When the air relative humidity is less than 85°C, take 0.4g of pure nano-sized diamond powder, add 1.2g of polyoxyethylene octylphenol ether-10, make the two fully react, add 98.3g of nearly boiling petroleum ether, Add 0.1 g of borated oleic acid diethanolamine and keep stirring, ultrasonically disperse for 30 minutes, and add acetic acid pH adjuster to prepare a fine grinding agent with neutral pH.

[0062] The fine abrasive prepared in Example 2 was used to grind quartz glass, and the surface roughness Ra was 1.0 angstroms.

Embodiment 3

[0064] The composition and weight of the fine grinding agent are as follows:

[0065] Nano diamond powder 5g

[0066] Nonyl-p-cresol ethoxylate-10 15g

[0067] Triethanolamine Borated Oleate 0.1g

[0068] 7 # Spindle Oil 79.9g

[0069] Its preparation process is as follows:

[0070] (1) get pure nano-scale diamond powder with the method of embodiment 1 (1);

[0071] (2) When the air relative humidity is less than 85%, take 5g of pure nano-sized diamond powder, add 15g of nonyl p-cresol polyoxyethylene ether-10, heat to make the two fully react, and add nearly rising 7 # Spindle oil 79.9g, add 0.1g triethanolamine borated oleate, ultrasonically disperse for 30 minutes, add triethanolamine PH value regulator, and ultrasonically disperse for 15 minutes to obtain a suspension with a pH value of 8---superfine grinding agent . The fine grinding agent in Embodiment 3 was used for grinding the X-ray reflector, and the surface roughness Ra after grinding was 0.4 angstroms.

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Abstract

The fine abrasive for polishing malgnetic head of computer consists of: nanometer level diamond powder 0.05-0.5 %, non-ionic suspension dispersant 0.05-15%, mildewproofing germicide 0.02-0.20 %, and light mineral oil 79.8-99.88 %. It is prepared through the processes including grinding diamond into homogeneous fine powder of 5-6 nm size mechanically; drying the nanometer level diamond powder; adding non-ionic suspension dispersant to diamond powder, heating, mixing, mixing with mineral oil and adding pH regulator, adding mildewproofing germicide and antioxidant. The product of the present invention may be used in polishing magentic head of computer to roughness of 0.4-4 A without scratch.

Description

technical field [0001] The invention relates to the technical field of ultra-precision machining and surface smoothing, in particular to a nano-scale ultra-fine grinding agent and a preparation process thereof. Background technique [0002] With the emergence of micro-nano electronic machinery (MEMS and NEMS), the microfabrication of devices is developing towards the direction of special ultra-precision machining, and the grinding technology has developed to the level of nano-scale ultra-fine surface processing to meet the needs of the mechanical and electronic industry. This technology is especially suitable for surface finishing of optics, precision equipment and computer read-write heads. At present, the commonly used abrasives as abrasives can no longer meet the needs of ultra-finishing. For example, in the polishing technology of computer magnetic heads, due to the amazing increase in the density of computer hard disks, the gap between disks and magnetic heads is close ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
Inventor 刘麒荣
Owner 刘麒荣
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