Colorless diamond and preparation method thereof
Through the high-temperature and high-pressure synthesis method of separately pressing the carbon source and catalyst, and alternately assembled with graphite sheets, catalyst sheets and nitrogen removal sheets, the problems of long synthesis time and low yield in the prior art are solved, and the efficient synthesis of high-grade colorless diamonds is achieved.
CN119656978AActive Publication Date: 2025-03-21CR GEMS SUPERABRASIVES
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Patent Information
- Application Number
- CN202411795926.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2044-12-09
AI Technical Summary
Technical Problem
It is difficult to synthesize high-grade colorless diamonds with high yields in the prior art, and the synthesis of temperature difference method has problems such as poor temperature stability, low yield and long production time.
Method used
The carbon source and the catalyst are separately pressed, and colorless diamonds are obtained by alternating assembly of graphite sheets, catalyst sheets and nitrogen removal sheets.
Benefits of technology
It improves the purity and color level of colorless diamonds, can reach D and E levels, shortens the synthesis time and improves the yield.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of diamond synthesis, in particular to a colorless diamond and a preparation method thereof. The preparation method comprises the following steps: 1) distributing seed crystals on a catalyst sheet; (2) alternately assembling a plurality of graphite sheets, nitrogen removal sheets and the catalyst sheets after seed distribution, so that the nitrogen removal sheets are contained between any graphite sheet and any catalyst sheet to obtain a core column; 3) coating the core column to obtain a synthetic block; and 4) pressurizing and heating the synthetic block to obtain the colorless diamond. The colorless diamond synthesized through the preparation method is high in purity and can reach the D grade and the E grade, meanwhile, compared with a temperature difference method, the synthesis time is shortened, and the single yield is increased.
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