A Synthetic Process for Improving Single Crystal Diamond Yield by Pronucleus Implantation

A technology of single crystal diamond and synthesis process, which is applied to the application of ultra-high pressure process, chemical instruments and methods, and the method of chemically changing substances by using atmospheric pressure. It can solve the problems of uneven particle size, high energy consumption, and uneven grade. advanced questions

Active Publication Date: 2020-11-03
CHANGSHA SHILI SUPERHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most of the methods used by many enterprises to produce synthetic diamonds adopt the static pressure method. The static pressure method needs to be produced under the conditions of ultra-high temperature and ultra-high pressure. In the diamond production process, according to the pre-set process conditions, the diamond product produced is closer to the process range), and the energy consumption is high, the diamond growth time, particle size is uneven, and the grade is not high

Method used

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  • A Synthetic Process for Improving Single Crystal Diamond Yield by Pronucleus Implantation
  • A Synthetic Process for Improving Single Crystal Diamond Yield by Pronucleus Implantation

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Embodiment 1

[0020] Embodiment 1: The process of producing single crystal diamond with a particle size range of 198-74 μm:

[0021] A kind of pronucleus implantation method improves the synthetic technique of monocrystalline diamond unit yield, comprises the steps:

[0022] 1. In the first step, the nano-diamond obtained by the explosion method is used as the pronucleus;

[0023] 2. In the second step, 30 parts per million of the diamond pronuclear raw material in the first step is mixed with 40%wt of metal catalyst and 40%wt of graphite carbon powder material. The metal catalyst is iron and nickel, wherein iron and nickel respectively account for 70%wt, 30%wt of catalyst component, described material is all prepared by weight ratio;

[0024] 3. In the third step, the three-dimensional mixing machine is used to mix the nano-diamond pronucleus, metal catalyst and graphite carbon powder materials evenly;

[0025] 4. In the fourth step, the materials in the third step are pressed by a doubl...

Embodiment 2

[0030] On the basis of Example 1, the second step scheme is adjusted to: 30 parts per million of the first step diamond pronuclear raw material, mixed with metal catalyst 45%wt, graphite carbon powder material 55%wt, the metal catalyst is Iron, nickel, and cobalt, wherein iron, nickel, and cobalt account for 72%wt, 26%wt, and 2%wt of the catalyst component respectively, and the materials are prepared by weight ratio; 310ct of single crystal diamond of 198-74μm can be obtained .

Embodiment 3

[0032] On the basis of embodiment 1, the second step scheme is adjusted to: 50 parts per million of the first step diamond pronuclear raw material, mixed with metal catalyst 50%wt, graphite carbon powder material 50%wt, the metal catalyst is Iron, nickel, and copper, wherein iron, nickel, and copper account for 68%wt, 26%wt, and 6%wt of the catalyst component respectively, and the materials are all prepared by weight ratio; 316ct of single crystal diamond of 198-74μm can be obtained .

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Abstract

The invention relates to a synthesis process for increasing unit yield of monocrystal diamond through a pronucleus implantation method. The synthesis process is characterized by including following steps: step 1, using nano diamond obtained through an explosion method as pronucleus; adding a metal catalyst and a graphite carbon powder material needed by the diamond for growth, mixing well, pressing for exhausting, performing high-vacuum deoxidation, and implanting into a pressure transfer medium pyrophyllite die; arranging conductive devices at two ends of a core, putting into a cubic press synthesis cavity, and synthesizing and growing monocrystal diamond at high temperature and high pressure. The monocrystal diamond produced by the synthesis process is high in unit yield, quality grade and premium grade rate, and energy conservation and consumption reduction are realized.

Description

technical field [0001] The invention relates to the field of superhard material synthesis technology, in particular to a single crystal diamond synthesis technology. Background technique [0002] Diamond is a crystal of carbon atoms bound by covalent bonds with saturation and directionality, so it has extremely high hardness and wear resistance, and is the hardest substance in nature known so far. The application fields of diamond are very extensive, such as mechanical processing industry, electronic and electrical industry, national defense industry, optical glass and gemstone processing industry, drilling and mining industry, construction and building materials industry, etc. The search for more advanced production technology. At present, the production methods of diamond mainly include: 1. Static pressure method, which refers to the method of mixing metal catalyst and graphite carbon powder, and putting it into a six-sided top press to synthesize diamond under the set ul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
CPCB01J3/062B01J2203/0605B01J2203/061B01J2203/062
Inventor 彭国强
Owner CHANGSHA SHILI SUPERHARD MATERIAL
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