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Preparation method and reaction system of high-grade artificial diamond

A technology of synthetic diamond and reaction system, which is applied in the field of preparation of high-grade synthetic diamond, can solve the problems of difficult industrialization, complex process, slow growth rate, etc., and achieve the effect of ensuring heating efficiency, high thermal conductivity, and good reaction temperature

Inactive Publication Date: 2021-01-05
深圳市智合碳硅科技有限公司
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  • Application Information

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Problems solved by technology

But the disadvantage is that the growth rate is slow, the process is complicated, and it is difficult to realize industrialization

Method used

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  • Preparation method and reaction system of high-grade artificial diamond
  • Preparation method and reaction system of high-grade artificial diamond

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Embodiment Construction

[0019] see figure 1 , in the technological process of the present invention and reaction principle schematic diagram, (1) is a feeding process, the purified water (H 2 O) is delivered to pressurization process (2), reaches pressure 1-35MPa through high pressure, makes (H 2 O) reach the supercritical pressure condition, enter the heating section (3) to preheat to 1-300 °C and then enter the reaction process (4), and add carbon source gas (4-1-1): CH4 or Ar, CO, etc., after Gas pressurization device (4-1) pressurizes 1-35MPa; add catalyst hydrogen: H 2 Pressurize 1-35MPa through the gas pressurization device (4-2). The conditions of the diamond preparation reaction are: Pc: 30-35MPa, Tc: 500-600°C; conversion reaction time: 10-60S; crystal growth time: 3-10d; the reaction process is:

[0020] (5) is the cooling process, the supercritical water and CH after the reaction 4 , H 2 The mixed gas enters the separation process (6) through the heating device (3). Separation condi...

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Abstract

The invention relates to a preparation method and a reaction system of high-grade artificial diamond. Supercritical water is used as a preparation medium, a plurality of carbon sources are used as rawmaterials, and the high-grade artificial diamond can be continuously prepared with high quality after 1-10 days under the temperature and pressure of a supercritical state and the catalytic action ofhydrogen. The reaction system is the core for preparing the high-grade artificial diamond, and the key for preparing the high-grade artificial diamond by the reaction device is to adopt double heating control and a suspended master batch hanging fence positioning structure design.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a method for preparing high-grade artificial diamond and a reaction system thereof. Background technique [0002] High-grade synthetic diamonds refer to large single-crystal synthetic diamonds of 1 carat or more than 10 carats, also known as gem-grade synthetic diamonds. High-grade synthetic diamond has developed rapidly due to market demand in recent years, and professional manufacturers at home and abroad are competing to develop and produce it. At present, there are roughly two preparation methods used: high temperature and high pressure method (HPHT method) and vapor phase deposition method (CVD method). [0003] The HPHT method, also known as the temperature difference method, is actually a physical high-pressure method using metal as a catalyst medium. This method was first proposed by GE in 1967. In 1971, a 5mm (about 1 carat) yellow single crystal diamond (Ib type) was synt...

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Application Information

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IPC IPC(8): B01J3/06
CPCB01J3/06
Inventor 彭靖彭英利马承愚周玉
Owner 深圳市智合碳硅科技有限公司