Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1789787 | Journal of Crystal Growth | 2016 | 6 Pages |
Abstract
In this paper, a series of nitrogen and hydrogen elements (N-H) co-doped diamond single crystals were synthesized in the NiMnCo-C system with melamine (C3N6H6) additive by temperature gradient growth (TGG) method under high-pressure and high-temperature (HPHT). High nitrogen and hydrogen growth environment obviously reduces the growth rate of the diamond. The synthetic diamond crystals are octahedral shape with a green or dark green color. This results indicate that the morphology of the synthetic N-H co-doped gem-diamond can be well-controlled by TGG method. Fourier transform infrared spectroscopy (FTIR) indicate that high-quality diamond single crystals with nitrogen concentrations up to 2100Â ppm have been successfully synthesized and the hydrogen related peaks at 2850Â cmâ1 (sp3-CH3) and 2920Â cmâ1 (sp3-CH2-) are found in these synthetic diamond. Meanwhile, with the increasing of C-centers the nitrogen atoms aggregate and form into A-centers in these synthetic diamonds. This is the highest quality of N-H co-doped gem-diamond single crystal synthesized in high nitrogen and high hydrogen growth environment reported so far.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Chao Fang, Xiaopeng Jia, Ning Chen, Yadong Li, Longsuo Guo, Liangchao Chen, Hong-an Ma, Xiaobing Liu,