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A kind of processing method of diamond micropowder

A technology of diamond micropowder and processing method, which is applied in the field of diamond micropowder, can solve problems such as environmental pollution and human hazards, and achieve the effects of reducing pollution and saving costs

Active Publication Date: 2016-08-24
HENAN JINGRUI SUPERHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above treatment process, a large amount of strong oxidizing acids such as perchloric acid or nitric acid are used, which pollutes the environment and causes harm to the human body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 500ct (the content of cobalt is 100ppm, the content of iron is 144ppm, the content of manganese is 55ppm) diamond micropowder and sodium hydroxide to be treated with a particle size of 2μm ~ 4μm into a stainless steel crucible according to the mass ratio of 1:3, 800 ℃ Boil for 2 hours to obtain alkali-treated diamond micropowder;

[0040] Cool the alkali-treated diamond micropowder, take it out and wash it with deionized water for no less than 3 times;

[0041] Put the cleaned alkali-treated diamond micropowder into a beaker, and add hydrochloric acid with a mass fraction of 38% according to a mass ratio of 1:3, stir at a stirring speed of 180 rpm, and start to introduce ozone after boiling at 100°C. The concentration of the ozone is 10mg / L, the gas flow rate of ozone is 100mL / min, take it out after 4 hours, and wash it with deionized water for no less than 5 times to obtain the diamond micropowder intermediate;

[0042] Put the obtained diamond micropowder interme...

Embodiment 2

[0045] Put 500ct (the content of cobalt is 150ppm, the content of iron is 124ppm, the content of manganese is 60ppm) diamond powder and sodium hydroxide to be treated with a particle size of 5 ~ 10μm into a stainless steel crucible according to the mass ratio of 1:3, 800 ℃ Boil for 2 hours to obtain alkali-treated diamond micropowder;

[0046]Cool the alkali-treated diamond micropowder, take it out and wash it with deionized water for no less than 3 times;

[0047] Put the cleaned alkali-treated diamond micropowder into a beaker, and add hydrochloric acid with a mass fraction of 36% according to a mass ratio of 1:3, stir at a stirring speed of 180 rpm, and start to introduce ozone after boiling at 100°C. The concentration of the ozone is 20mg / L, the gas flow rate of ozone is 500mL / min, take it out after 1 hour, and wash it with deionized water for no less than 5 times to obtain the diamond micropowder intermediate;

[0048] Put the obtained diamond micropowder intermediate in...

Embodiment 3

[0051] Put 500ct (the content of cobalt is 122ppm, the content of iron is 140ppm, the content of manganese is 50ppm) diamond powder to be treated with a particle size of 4-8μm and sodium hydroxide into a stainless steel crucible according to the mass ratio of 1:3, 800 ℃ Boil for 2 hours to obtain alkali-treated diamond micropowder;

[0052] After cooling, the diamond micropowder is taken out and cleaned with deionized water for no less than 3 times;

[0053] Put the cleaned diamond powder into a beaker, and add hydrochloric acid with a mass fraction of 37% according to the mass ratio of 1:3, stir, the stirring speed is 180 rpm, and start to introduce ozone after boiling at 100 ° C. The concentration of ozone 30mg / L, the gas flow rate of ozone is 1000mL / min, take it out after 30 hours, and wash it with deionized water for no less than 5 times to obtain a diamond micropowder intermediate;

[0054] Put the obtained diamond micropowder intermediate into an oven for drying, and ta...

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Abstract

The invention provides a method for processing diamond micropowder. The method comprises the following steps: carrying out alkali treatment on to-be-processed diamond micropowder to obtain alkali-treated diamond micropowder; carrying out hydrochloric acid treatment on the alkali-treated diamond micropowder, and introducing ozone to obtain a diamond micropowder intermediate; and drying the diamond micropowder intermediate to obtain diamond micropowder. According to the processing method provided by the invention, the ozone is introduced to process when the diamond micropowder is processed, so that use of strong oxidative acids is avoided; the cost is reduced; and the pollution to the environment is reduced. In addition, the diamond micropowder obtained by the method is relatively low in impurity content. An experiment result shows that the cobalt content of the diamond micropowder obtained by the processing method disclosed by the invention is smaller than or equal to 5ppm; the content of manganese is smaller than or equal to 10ppm; and the content of iron is smaller than or equal to 5ppm.

Description

technical field [0001] The invention belongs to the technical field of diamond micropowder, and in particular relates to a processing method of diamond micropowder. Background technique [0002] Diamond micropowder refers to diamond particles with a particle size finer than 36 / 54 microns. Diamond micropowder has high hardness and good wear resistance, and can be widely used in cutting, grinding, drilling, etc. Ideal raw material for high hardness materials such as glass. In addition, the diamond micropowder used in the synthesis of polycrystalline diamond has relatively high requirements on impurity content, and requires good dispersion to facilitate uniform mixing. [0003] The commonly used diamond powder treatment method is acid-base treatment. First, the diamond powder to be treated is placed in molten sodium hydroxide, and the pyrophyllite component in the synthesis process is removed at a temperature of 800 ° C, mainly including aluminum, silicon and other elements; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/06
Inventor 王晓李治海
Owner HENAN JINGRUI SUPERHARD MATERIAL