Technical Physics Letters
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Mechanism for diamond single crystal synthesis from diamond nanoparticles at high pressures and temperatures
Eidelman E. D.
1,2, Vul` A.Yu.1
1Ioffe Institute, St. Petersburg, Russia
2St. Petersburg State Chemical Pharmaceutical Academy, St. Petersburg, Russia
2St. Petersburg State Chemical Pharmaceutical Academy, St. Petersburg, Russia
Email: Eidelman@mail.ioffe.ru
A mechanism for the formation of submicron diamond single crystals from diamond nanoparticles under high pressure and high temperature (HPHT synthesis) in the presence of organic compounds, which contain C-O-H groups, without a metal catalyst is proposed. The mechanism is based on the concept that under certain conditions, an additional pressure (with respect to the applied static one) is produced in the process of pyrolysis of such compounds and ensures the formation of macroscopic single crystals. Keywords: HPHT diamond synthesis, diamond nanoparticles, macroscopic diamond single crystals.
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