Karat-grade diamond synthesizing device and synthesizing method thereof

Abstract

The invention discloses a karat-grade diamond synthesizing device and a synthesizing method thereof. Firstly, a heating tube, a cellular module, a thermal-insulation pressure transfer piece, a heatingpiece and a metal sheet are utilized for being assembled into a synthesizing column, and then the synthesizing column is put into a pyrophyllite cavity body which is formed by buckling an upper halfpart pyrophyllite cup body and a lower half part pyrophyllite cup body to obtain a synthesized block; then the synthesized block is put into hexahedron synthetic diamond press to be synthesized to obtain karat-grade diamond. The synthesizing device utilized in a preparation method can provide completely independent growth environment for each particle of diamond, so that the diamond is ensured tostably, efficiently and excellently grow for a long time; by means of pyrophyllite inner through holes and a conducting column, heating power is reduced, electric energy is saved, energy is saved, emission is reduced, temperature homogeneity in the synthesizing cavity body is improved, and excellent diamond synthesis is improved. In a preparation process of the method, a synthesizing column is invacuum package, so that the synthesizing column is prevented from being oxidized in a synthesizing process, and impurity nitrogen is prevented from being increased.

Description

technical field [0001] The invention belongs to the field of diamond synthesis, and in particular relates to a synthesis device and a synthesis method for carat-level diamonds. technical background [0002] Diamond is also called diamond. With the continuous advancement of science and technology, gem-quality diamonds have been widely used in ultra-precision machining of high-hardness materials, heat sinks for semiconductor lasers and high-power laser weapons, window materials in the aerospace field, optical materials and wide-bandgap semiconductor materials, etc., are playing an increasingly important role. At present, the demand for jewelry-grade diamonds in the market is also increasing, especially for carat-grade diamonds. Therefore, natural diamonds are far from meeting the needs of development. Therefore, various methods of artificially synthesizing diamonds have been developed in this field. [0003] At present, the synthesis methods of diamonds are mainly based on ...

AI Technical Summary

Problems solved by technology

At present, the cavity structure adopted by the temperature difference method mainly adopts the upper and lower indirect heating method, and the temperature difference mainly depends on the carbon source in the high temperature zone being transported to the surface of the seed crystal in the low temperature zone through the molten catalyst, so that it grows; but due to the heating method Influenced by the method of assembly and assembly, the up and down direction, the temperature is high and the bottom is low, and the left and right directions are high outside and low inside. Therefore, it is easy to cause a large difference in radial and longitudinal temperature differences during the diamond growth process, resulting in the deposition rate of carbon sources at different positions and The content of the carbon source is different, resulting in different sizes of synthetic diamonds; in addition, the lateral temperature difference in the left and right directions is also easy to cause segregation of carbon sources, making the shape of synthetic diamonds poor.

[0004] For carat-level diamonds that have been synthesized for a long time, the above-mentioned problems make the defects of synthetic diamonds more obvious, greatly reducing the quality of carat-level diamonds produced, making it difficult to achieve stable production of carat-level diamonds, and high-quality products cannot be obtained. , which reduces the overall production efficiency and the output rate is low

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