A synthetic block of colorless diamond for artificial synthetic jewelry and its synthetic method

Abstract

The invention discloses a synthesis block and synthesis method of colorless diamonds for artificially synthesized jewelries. The synthesis block of the colorless diamond comprises a pyrophyllite empty block and a core column which is arranged in the center of the synthesis block and is of a multi-layer permeability structure, the core column comprises a dolomite flake, a carbon source, a catalyst flake, a Cu foil-catalyst flake composite layer and a crystal bed which are sequentially stacked from the first end to the second end of the pyrophyllite empty block. The synthesis technology method of the colorless diamonds comprises the steps that by controlling the ingredients of the medium flake, the purity of the carbon source and the thickness of the Cu foil, thermal molecular movement of carbon atoms, melting of the catalyst flake and a reaction generated between the Cu foil and nitrogen atoms mutually achieve synergistic cooperation and achieve combined action appropriately, the carbon atoms make contact with diamond seed crystals to be gaplessly nucleated and grow on the surfaces of the seed crystals, generation of inclusions or internal impurities is avoided, and the purity degree and the hardness level of the diamonds are increased. According to the synthesis block and synthesis method, the product particle size, color and purity degree are guaranteed, the finished product rate and the practicability are high, large-scale production of the pure colorless high-quality diamonds for the jewelries is effectively achieved, and the synthesis block and the synthesis method are worthy of wide application and popularization.

Description

technical field [0001] The invention belongs to the technical field of synthetic production of superhard materials, and relates to a synthetic block of colorless diamonds for artificial synthetic jewelry and a synthetic method thereof, which is suitable for the synthetic production of jewelry-grade colorless diamonds. Background technique [0002] At present, large-grain artificial diamonds have entered the field of jewelry, and large-grain colorless diamonds (Type IIa) for jewelry have great market space and prospects. Although, in recent years, the domestic temperature difference method plus fading synthesis technology has made breakthroughs and can produce a small amount of colorless diamonds, but the structural stability and thermal insulation effect of the synthetic blocks are poor, the nitrogen removal efficiency is low, and the product purity is poor, resulting in product The quality and yield are far from meeting the requirements of industrial production. The color g...

AI Technical Summary

Problems solved by technology

Although, in recent years, the domestic temperature difference method plus fading synthesis technology has made breakthroughs and can produce a small amount of colorless diamonds, but the structural stability and thermal insulation effect of the synthetic blocks are poor, the nitrogen removal efficiency is low, and the product purity is poor, resulting in product The quality and yield are far from meeting the requirements of industrial production. The color grade is basically G / H grade, and a very small amount of E / F grade. A reliable and stable synthesis method is the basic condition for realizing the industrial production of large-grained colorless diamonds for jewelry.

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