Multiseed Method for High Quality Sheet Cubic Diamonds Synthesis: An Effective Solution for Scientific Research and Commercial Production

• Published in: Crystal growth & design 2012-01, Vol.12 (1), p.518-521
• Main Authors: Hu, Meihua, Ma, Hong-an, Yan, Bingmin, Li, Yong, Li, Zhanchang, Zhou, Zhenxiang, Jia, Xiaopeng
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Fullerenes and related materials; diamonds, graphite; Growth from melts; zone melting and refining; High-pressure and shock-wave effects in solids and liquids; Materials science; Mechanical and acoustical properties of condensed matter; Methods of crystal growth; physics of crystal growth; Physics; Specific materials; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation
• ISSN: 1528-7483; 1528-7505
• DOI: 10.1021/cg2014539

A multiseed method for high quality sheet cubic diamonds synthesis by a temperature gradient method (TGM) under high pressure and high temperature (HPHT) conditions for scientific research and commercial production has been designed and discussed. Multiseed method diamond synthesis can accommodate much larger sample volumes than a single seed method as the high pressure apparatus volume increases. For the cubic diamond crystal, the radial growth rate is much higher than the axial growth rate, and the whole growth rate of diamond crystals have been effectively increased because of more seeds embedded in a growth cell. Computer simulation and experimental results indicate that the enhanced diamond growth cell designed for the multiseed method to synthesize large diamonds is effective and suitable. Our proposed method saves the cost associated with the growth cell and increases the efficiency to adapt the large sample volume for the commercial production.