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High-precision non-water-based nano-diamond grinding fluid and preparation method and application thereof

A diamond and nano-level technology, applied in the field of high-precision grinding and polishing, can solve problems such as hydrolysis, deliquescence, and difficult polishing efficiency that cannot be completely eliminated, and achieve the effect of improving polishing efficiency and polishing quality.

Inactive Publication Date: 2010-09-15
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Invention patent application 00133674.6 reports a non-aqueous-based non-abrasive polishing liquid applied to the polishing of soft, brittle and deliquescent crystals such as potassium dihydrogen phosphate (KDP). The solvent used is a mixture of water and alcohol or fat, and still has a certain polarity. , cannot completely eliminate the hydrolysis and deliquescence of crystals during polishing
Invention patent CN 1600104C discloses a nano-scale polishing liquid using light white oil or naphtha as a solvent, but the diamond particle size is only 3-18nm, which makes it difficult to achieve ideal polishing efficiency

Method used

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  • High-precision non-water-based nano-diamond grinding fluid and preparation method and application thereof
  • High-precision non-water-based nano-diamond grinding fluid and preparation method and application thereof
  • High-precision non-water-based nano-diamond grinding fluid and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Adjust the pressure of the airflow crushing equipment to 1.2Mpa, and fully refine the blast-dried synthetic diamond raw materials until 60% of the diamond particle size is less than 200nm, then transfer it to a fluidized bed reactor, pass hydrogen, and heat-treat at a high temperature of 500°C for 8 hours. The gas flow rate is 120L / h. After completion, pour the diamond into the beaker, add nitric acid in a ratio of 1:1, supplement deionized water to keep the concentration of nitric acid in the solution greater than 1mol / L, heat the reaction until boiling, assist stirring, and keep boiling for 1 hour , after centrifugation, pour the diamond into the beaker, add potassium hydroxide in a ratio of 1:1, heat the reaction, assist stirring, and then overflow and elutriate, and then add the mixed solution of deionized water and glycerol / deionized water respectively (volume ratio is 1:5) in the hydrocyclone to separate and remove coarse particles with a particle size larger than ...

Embodiment 2

[0038] Use ball milling to fully refine the explosive-dried synthetic diamond raw material until 60% of the diamond particle size is less than 200nm, then transfer it to a fluidized bed reactor, pass hydrogen, and heat-treat at 500°C for 8 hours at a high temperature cycle, with an air flow rate of 120L / h. After completion, pour the diamond into the beaker, add hydrochloric acid in a ratio of 1:2, add deionized water to keep the concentration of hydrochloric acid in the solution greater than 1mol / L, heat the reaction to boiling, assist stirring, keep boiling for 1 hour, and pour the diamond into the beaker after centrifugation Put it into a beaker, add potassium hydroxide in a ratio of 1:1, heat the reaction, assist stirring, and then overflow and elutriate, and then add the mixed solution of deionized water and ethylene glycol / deionized water (volume ratio is 1:3 ) in a hydrocyclone to separate and remove coarse particles with a particle size larger than 200nm and fine particl...

Embodiment 3

[0040] Adjust the pressure of the airflow crushing equipment to 1.2Mpa, fully refine the blast-dried synthetic diamond raw material until 60% of the diamond particle size is less than 200nm, then transfer it to a shaping ball mill, and shape it for 8 hours, and then pour the diamond into a beaker. Add nitric acid in a ratio of 1:2, add deionized water to keep the concentration of nitric acid in the solution greater than 1mol / L, heat the reaction until boiling, assist stirring, keep boiling for 1 hour, and pour the diamond into the beaker after centrifugation, press 1:1 Potassium hydroxide is added at a certain ratio, heated for reaction, assisted stirring, and then centrifuged, then transferred to deionized water and purified by ion exchange resin, and the purified diamond is chemically analyzed, and the impurity content is only 0.0368%.

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Abstract

The invention provides a high-precision non-water-based nano-diamond grinding fluid and a preparation method and application thereof. The high-precision non-water-based nano-diamond grinding fluid comprises main components of nano-diamond particles, a dispersion stabilizing agent, a suspension agent, a pH value regulator, an antistatic agent, an antioxidant, a dispersion medium and the like. In the invention, the particle size distribution is 130nm or smaller D50 particle size; the ratio of D10 to D50 is 50 percent or more; and the ratio of D90 to D50 is 200 percent or less. The preparation method comprises the following steps of: thinning diamond raw materials; carrying out modifying processing; deeply purifying; separating particle size; and finally mixing components according to a certain ratio. The invention has the advantages of completely eliminating deliquesce, hydrolization, chemical corrosion and electrochemical corrosion during the premise polishing and improving the polishing efficiency and the polishing quality to be maximum extent. The products have wide application to hard alloys, disk moulds, computer magnetic heads, computer disks, solar batteries and the like.

Description

technical field [0001] The invention belongs to the field of high-precision grinding and polishing, and relates to a grinding fluid for grinding and polishing, in particular to a high-precision non-water-based nano-scale diamond grinding fluid and a preparation method thereof. Background technique [0002] Due to its superhardness and chemical stability, diamond has advantages that other abrasives cannot match, such as high polishing efficiency and good polishing quality. It has been widely used in the grinding and polishing of various material surfaces for a long time. With the development of science and technology, the precision requirements on the surface of many devices are getting higher and higher. In only about half a century, the recording density of the disk surface has never been less than 150Mb / in 2 Developed to the current 1Tb / in 2 , the corresponding head flying height has been reduced to below 10nm. Considering that the pole tip settlement (PTR) will reduce ...

Claims

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Application Information

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IPC IPC(8): C09G1/02
Inventor 田光磊刘亮
Owner CHINA JILIANG UNIV
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