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Preparation device and preparation method of double-carbon source synthesized artificial diamond

A technology for artificial diamonds and preparation devices, which is applied in chemical instruments and methods, methods for chemically changing substances by using atmospheric pressure, and ultra-high pressure processes, etc., which can solve the problems of expensive seed crystals and inability to apply large-scale production, etc. problem, to achieve the effect of increasing the width/height ratio and increasing the growth rate

Pending Publication Date: 2018-03-23
王国伟
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Problems solved by technology

However, 5x 5mm wafer seed crystals are extremely expensive, so the above technology cannot be applied to large-scale production

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  • Preparation device and preparation method of double-carbon source synthesized artificial diamond
  • Preparation device and preparation method of double-carbon source synthesized artificial diamond
  • Preparation device and preparation method of double-carbon source synthesized artificial diamond

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Embodiment Construction

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] According to an embodiment of the present invention, a kind of dual carbon source synthetic synthetic diamond preparation device is proposed, such as figure 2 As shown, the preparation device includes a pressure transmission medium cube 8, a graphite heating tube 1 and a synthesis chamber. The graphite heating tube 1 is located on the inner wall of the inner hole of the pressure transmission medium cube 8. The bed 7, the Mg...

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Abstract

The invention relates to a preparation device and a preparation method of double-carbon source synthesized artificial diamond. The preparation device comprises a pressure transmitting medium cube, a graphite heating pipe and a synthesizing cavity, wherein an MgO (magnesium oxide) crystal bed in the synthesizing cavity is provided with crystal containing grooves at intervals; a plurality of blind holes are formed in the MgO crystal bed. The preparation method comprises the following steps of filling diamond micropowder into the blind holes to be used as a second carbon source, and enabling thesecond carbon source and a graphite carbon source to synthesize the artificial diamond. The preparation device and the preparation method have the advantages that by adopting the double carbon sourcesof graphite and diamond micropowder, when a plurality of artificial diamond monocrystals are grown in a high temperature-high pressure temperature gradient way, the growth rate of the diamond monocrystals in first 48h can be obviously improved, and the average growth rate of monocrystal reaches 10mg / hr; the cleanliness of monocrystal can reach VVS level.

Description

technical field [0001] The invention relates to the field of powder preparation, in particular to the technical field of artificial diamond manufacturing. Background technique [0002] The so-called temperature-gradient method is used when using high-temperature-high-pressure equipment such as two-sided tops, six-sided tops, and pressless ball-type ultra-high pressure devices (BARS) to synthesize gem-grade synthetic diamond single crystals. [0003] Such as figure 1 As shown, the device for synthesizing synthetic diamond by temperature-gradient method usually includes graphite heating tube 1, MgO cover 2, carbon source (graphite) 3, MgO tube 4, metal catalyst 5, seed crystal 6, MgO crystal bed 7, pressure transmission Medium cube 8, when growing a gem-grade synthetic diamond single crystal, the anvil of the high-pressure synthesis equipment simultaneously and uniformly squeezes the outer surface of the pressure transmission medium cube 8, and the pressure transmission mediu...

Claims

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Application Information

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IPC IPC(8): B01J3/06
CPCB01J3/062B01J2203/062B01J2203/061B01J2203/0655
Inventor 曹大呼龙政鑫李培培
Owner 王国伟
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