INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Synthesis and characterization of a single diamond crystal with a high nitrogen concentration |
Zhang Zhuang-Fei(张壮飞), Jia Xiao-Peng(贾晓鹏), Liu Xiao-Bing(刘晓兵), Hu Mei-Hua(胡美华), Li Yong(李勇), Yan Bing-Min(颜丙敏), and Ma Hong-An(马红安)† |
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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Abstract In this paper, we explore diamond synthesis with a series of experiments using an Fe-Ni catalyst and a P3N5 additive in the temperature range of 1250-1550 ℃ and the pressure range of 5.0-6.3 GPa. We also investigate the influence of nitrogen on diamond crystallization. Our results show that the synthesis conditions (temperature and pressure) increase with the amount of P3N5 additive increasing. The nitrogen impurity can significantly influence the diamond morphology. The diamonds stably grow into strip and lamellar shapes in the nitrogen-rich environment. The Fourier-transform infrared spectrum shows that the nitrogen concentration increases rapidly with the content of P3N5additive increasing. By spectrum analysis, we find that with the increase of the nitrogen concentration, the Ib-type nitrogen atoms can aggregate in the A-centre form. The highest A-centre nitrogen concentration is approximately 840 ppm.
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Received: 12 September 2011
Revised: 28 October 2011
Accepted manuscript online:
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PACS:
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81.10.Fq
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(Growth from melts; zone melting and refining)
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61.72.S-
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(Impurities in crystals)
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64.70.dg
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(Crystallization of specific substances)
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07.57.Ty
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(Infrared spectrometers, auxiliary equipment, and techniques)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51172089) and the Program for New Century Excellent Talents in University, China. |
Corresponding Authors:
Ma Hong-An,maha@jlu.edu.cn
E-mail: maha@jlu.edu.cn
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Cite this article:
Zhang Zhuang-Fei(张壮飞), Jia Xiao-Peng(贾晓鹏), Liu Xiao-Bing(刘晓兵), Hu Mei-Hua(胡美华), Li Yong(李勇), Yan Bing-Min(颜丙敏), and Ma Hong-An(马红安) Synthesis and characterization of a single diamond crystal with a high nitrogen concentration 2012 Chin. Phys. B 21 038103
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