Assembly block for artificially cultivating diamond

Abstract

The invention belongs to the technical field of processing and manufacturing of artificially cultivated diamonds, and particularly relates to an assembly block for artificially cultivated diamonds. The assembly block can be divided into four layers from inside to outside; a magnesium oxide layer containing a raw material column in the center of the assembly block is used as a core first layer; a second layer is composed of heat preservation layers designed on the upper portion and the lower portion of the magnesium oxide layer and graphite pipes oppositely designed in the longitudinal direction; a third layer is composed of NaCl tubes designed outside the graphite tubes in the longitudinal direction and graphite flakes designed in the transverse direction; meanwhile, an outer lining layer is arranged outside the longitudinal NaCl pipe; and a fourth layer is a pyrophyllite synthetic block on the outermost layer. By utilizing the advantages of a temperature gradient method, the defects of insufficient power and carbon source supply in the later growth stage of a static pressure melting medium powder synthesis method are overcome by providing continuous power guarantee and carbon source supply, and meanwhile, the defects of the existing temperature gradient method are overcome by improving the design of a heat preservation structure.

Description

technical field [0001] The invention belongs to the technical field of artificially cultivated diamond processing and manufacturing, and in particular relates to an assembly block for artificially cultivated diamond. Background technique [0002] Cultivated diamonds refer to diamonds obtained by artificial industrial synthesis methods. When the weight, clarity, color, etc. meet the requirements of gem-grade, after specific cutting and polishing, they can be further used as cultivated diamonds in other industries such as jewelry processing. With the progress of production technology, the development of society and the increase of people's demand, in recent years, the synthetic production technology of cultivating diamond has been further developed. [0003] In the prior art, methods for synthesizing and cultivating diamond mainly include high-pressure high-temperature method (HPHT method) and chemical vapor deposition method. Restricted by factors such as cost, the HPHT high...

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Problems solved by technology

[0004] When synthesizing cultivated diamonds by the static pressure fusion method, on the one hand, it is necessary to continuously replenish the pressure diffusion driving force lost due to the volume shrinkage of the synthetic block, but the pressure limit of the six-sided top press equipment cannot be exceeded, which limits the static pressure fusion medium. Sustainability and stability of synthetic cultured diamonds in long-term synthesis. On the other hand, the quality stability of cultured diamonds synthesized by static pressure fusion method is relatively poor, and the yield rate is relatively low;

[0005] When the temperature gradient method is used to synthesize cultivated diamonds, on the one hand, during the synthesis process, cultivated diamonds grow on the same catalyst sheet, and it is difficult to avoid mutual interference. Due to the poor growth environment and many impurities, common products such as grooves, roundness, etc. Defects such as arcs and deformities; on the other hand, due to structural limitations, while the output of a single block is low, the room for improvement is correspondingly small

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