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A kind of purification method of artificial diamond

A technology of artificial diamond and artificial diamond powder, applied in diamond and other directions, can solve problems such as incomplete oxidation of residual graphite, and achieve the effects of improved working environment, good wave transmission performance and convenient operation.

Active Publication Date: 2019-11-08
ZHENGZHOU UNIVERSITY OF AERONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for purifying artificial diamond, to solve the technical problem of incomplete oxidation of residual graphite in the prior art

Method used

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  • A kind of purification method of artificial diamond
  • A kind of purification method of artificial diamond
  • A kind of purification method of artificial diamond

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The purification method of the artificial diamond of the present embodiment may further comprise the steps:

[0043] 1) The artificial diamond synthetic rod synthesized by the high temperature and high pressure method is mechanically crushed, sieved, and the artificial diamond synthetic rod powder is obtained, the particle size is below 1mm, and its X-ray diffraction analysis is as follows: figure 1 shown by figure 1It can be seen that the synthetic diamond synthetic rod powder contains more non-diamond carbon;

[0044] 2) Put 200g of synthetic diamond rod powder in the crucible, then place the crucible in a dual-frequency microwave sintering equipment, and carry out microwave heating treatment for 90 minutes in a flowing air atmosphere. The dual-frequency is 915MHz and 2450MHz simultaneously, and the heating temperature is at 550°C to obtain pretreated synthetic diamond mixed powder;

[0045] 3) The pretreated artificial diamond mixed powder is crushed by ball millin...

Embodiment 2

[0048] The purification method of the artificial diamond of the present embodiment may further comprise the steps:

[0049] 1) mechanically crushing the synthetic diamond rod, and sieving to obtain synthetic diamond synthetic rod powder, the particle size of which is below 1 mm;

[0050] 2) Put 200g of synthetic diamond synthetic rod powder in a crucible, then place the crucible in a dual-frequency microwave sintering equipment, and carry out microwave heating treatment for 60 minutes under a flowing air atmosphere, and the dual frequency is 915MHz and 2450MHz simultaneously, and the heating temperature is 600°C, to obtain pretreated synthetic diamond mixed powder;

[0051] 3) crushing the pretreated artificial diamond mixed powder by ball milling in water, and separating the magnetic metal catalyst from the diamond particles by magnetic separation;

[0052] 4) Place the diamond particles separated in step 3) in a crucible, and then add a surfactant, which is mixed with water...

Embodiment 3

[0054] The purification method of the artificial diamond of the present embodiment may further comprise the steps:

[0055] 1) mechanically crushing the synthetic diamond rod, and sieving to obtain synthetic diamond synthetic rod powder, the particle size of which is below 1 mm;

[0056] 2) Put 200g of synthetic diamond synthetic rod powder in the crucible, then place the crucible in a dual-frequency microwave sintering equipment, and carry out microwave heating treatment for 120min under a flowing air atmosphere. The dual-frequency is 915MHz and 2450MHz simultaneously, and the heating temperature is 400°C, to obtain pretreated synthetic diamond mixed powder;

[0057] 3) crushing the pretreated artificial diamond powder by ball milling in water, and separating the magnetic metal catalyst from the diamond particles by magnetic separation;

[0058] 4) Place the diamond particles separated in step 3) in a crucible, then add a surfactant with a volume fraction of 3% hydrogen pero...

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Abstract

The invention relates to a method for purifying synthetic diamond, and belongs to the technical field of synthetic diamond post-processing. The method for purifying the synthetic diamond comprises thefollowing steps that (1) microwave heating processing is carried out on synthetic diamond powders for 60-120 minutes to obtain pre-processed synthetic diamond powders; (2) magnetic separation processing is carried out on the pre-processed synthetic diamond powders to obtain diamond particles; (3) the separated diamond particles in step (2) are mixed with surfactant for microwave processing. The microwave heating processing in step (1) is multimode resonant mode bifrequency processing. Compared with the traditional method for purifying synthetic diamond, the method for purifying the syntheticdiamond has the advantages that the process is simple, the operation is convenient, the heating temperature is low, the time is short, the work environment obtains great improvement, the environmentalpollution problem in the process of purifying the existing synthetic diamond is thoroughly solved, the method for purifying the synthetic diamond is suitable for large-scale industrial application and has a very wide application prospect.

Description

technical field [0001] The invention relates to a method for purifying artificial diamond, which belongs to the technical field of post-treatment of artificial synthetic diamond. Background technique [0002] Diamond has the highest hardness, thermal conductivity, good wear resistance and chemical stability, making it widely used in the fields of mechanics, heat, electronics and optics. The existing artificial diamonds of different particle size grades are mainly synthesized by methods such as static pressure method, explosion vibration method and detonation method. In these synthetic methods, the resulting SP 3 The content of diamond phase varies from 15-75%, the rest consists of a large amount of SP 2 Composed of graphite carbon, amorphous carbon and other metal catalysts. How to remove a large amount of non-diamond carbon and obtain high-purity diamond is the premise of its application and the key link of production. The quality of the separation and purification proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/28
Inventor 张锐樊磊陈雷明范冰冰刘永奇宋晓宇刘军威王铖邵刚王海龙赵彪高卡郭晓琴李春光
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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