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Diamond powder having surface-coated non-diamond phase carbon layer and production method thereof

A diamond micropowder, non-diamond technology, used in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc. To achieve the effect of good machined surface flatness, low price and good grinding force

Inactive Publication Date: 2008-06-25
HENAN UNION ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN1186401C describes a method for surface treatment of nano-diamond particles, so that different organic molecules are combined on the surface of nano-diamond particles, thereby changing the hydrophilicity and lipophilicity of nano-diamond particles, and improving their suspension in water and oil phases performance; people such as Xu Xiangyang described the modification treatment method of nano-diamond in water medium and white oil medium (China Powder Technology, 2003, Vol. 9, No. 4, pp. 30-34; 4 Issue 61-64 pages), but these two documents are not able to solve the problem of grinding force and surface smoothness requirements of diamond particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: A kind of surface is coated with the diamond micropowder of non-diamond phase carbon layer and production method thereof

[0023] Accurately weigh 50g of 6-micron diamond micropowder abrasive, place it in a 1000ml flask, add 800ml of an aqueous solution of 2% triethanolamine oleate, and use electric stirring to evenly disperse the diamond micropowder abrasive in the dispersion medium to form a stable dispersed suspension . Then use negative pressure filtration to separate the diamond abrasive from the suspension, put it into a porcelain crucible, dry it in an electric oven at 110°C for 6 hours, remove the dispersion medium, and then place it in an atmosphere high-temperature furnace under argon. Treat at 500°C for 6 hours under air protection to get the dark gray to gray black primary product. In order to obtain a thicker coating layer, the obtained primary product is put into 2% triethanolamine oleic acid aqueous solution again, and the aforementioned di...

Embodiment 2

[0027] Embodiment 2: a kind of surface is coated with the diamond micropowder of non-diamond phase carbon layer and production method thereof

[0028] Accurately weigh the 0.5 micron diamond micropowder abrasive of 20g, place it in a 1000ml flask, add 800ml of 5% sodium dodecylbenzenesulfonate aqueous solution, adopt the way of electric stirring to make the diamond micropowder abrasive evenly disperse in the described aqueous solution, form Stable dispersed suspension. The diamond micropowder abrasive is separated from the suspension by high-speed centrifugal separation, put into a porcelain crucible, and first dried in an electric drying oven at 110°C for 6 hours to remove moisture, and then placed in a high-temperature furnace with a nitrogen atmosphere. Under the condition of 400 DEG C under protection for 4 hours, the dark gray to gray black product of the present invention can be obtained. After the product has been treated with hydrophilic or lipophilic surface, it can ...

Embodiment 3

[0031] Embodiment 3: a kind of surface is coated with the diamond micropowder of non-diamond phase carbon layer and production method thereof

[0032] Accurately weigh 20g of 0.5 micron size diamond micropowder abrasive, place it in a 1000ml flask, add 600ml of ethanol solution of 5% stearic acid, adopt ultrasonic dispersion to make diamond micropowder abrasive evenly disperse in the ethanol solution, form a stable Dispersed suspension. Use negative pressure filtration to separate the diamond micropowder abrasive from the suspension, put it into a porcelain crucible, and dry it in an electric drying oven at a temperature of 110°C for 4 hours to remove the dispersion medium; then place it in an atmosphere high-temperature furnace Medium and under the protection of argon at a temperature of 400°C for 5 hours, the dark gray to gray black primary product can be obtained.

[0033] In order to obtain a thicker coating layer, put the obtained primary product into the ethanol dispers...

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PUM

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Abstract

The invention discloses diamond powder coated with a non-diamond carbon layer and a production method thereof.The product has the non-diamond carbon layer coated on the surface of the diamond powder abrasives, and the mass of the non-diamond carbon layer is 0.05 to 10 percent of the total mass of the diamond powder. During the manufacture process, organic compounds are used for surface coating treatment to the diamond powder abrasives; the treated diamond powder abrasives are placed under non-oxidation atmosphere and heat treated at 400 to 1000 DEG C in a high temperature furnace for two to ten hours; the organic compounds are carbonized, and a coating film composed of the non-diamond carbon layer is formed on the surface of the diamond powder abrasives. The product has steady performance, low price, and good grinding force and processing surface planeness. The product adopts general chemical processing method and heat treatment method during manufacturing, which has mature and stable technique, little equipment input and low manufacture cost.

Description

1. Technical field: [0001] The invention relates to a diamond micropowder and a production method thereof, in particular to a diamond micropowder whose surface is coated with a non-diamond phase carbon layer and a production method thereof. 2. Background technology: [0002] With the rapid development of the electronic information industry, the requirements for ultra-flat surface processing are getting higher and higher. Micron or even submicron diamond abrasives have been widely used in this field and become an indispensable material for the manufacture of computer hard disks, silicon wafers, and surface planarization of integrated circuits. At present, the diamond abrasives used in this field are mainly micron, submicron and nanometer abrasive products obtained by crushing, shaping, purifying and grading diamonds synthesized by static pressure method. This product forms an irregular polyhedron with sharp edges and corners during processing, and has a high material removal...

Claims

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Application Information

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IPC IPC(8): C09C3/00C09C1/44
Inventor 庞海岩贾晓林汪静
Owner HENAN UNION ABRASIVES
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