中国物理B ›› 2012, Vol. 21 ›› Issue (3): 38103-038103.doi: 10.1088/1674-1056/21/3/038103

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张壮飞,贾晓鹏,刘晓兵,胡美华,李勇,颜丙敏,马红安   

  • 收稿日期:2011-09-12 修回日期:2011-10-28 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 马红安,maha@jlu.edu.cn E-mail:maha@jlu.edu.cn

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)   

  1. National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2011-09-12 Revised:2011-10-28 Online:2012-02-15 Published:2012-02-15
  • Contact: Ma Hong-An,maha@jlu.edu.cn E-mail:maha@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51172089) and the Program for New Century Excellent Talents in University, China.

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 P3Nadditive 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.

Key words: characterization, morphology, diamond, nitrogen concentration

中图分类号:  (Growth from melts; zone melting and refining)

  • 81.10.Fq
61.72.S- (Impurities in crystals) 64.70.dg (Crystallization of specific substances) 07.57.Ty (Infrared spectrometers, auxiliary equipment, and techniques)