中国物理B ›› 2017, Vol. 26 ›› Issue (9): 98101-098101.doi: 10.1088/1674-1056/26/9/098101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Synthesis of diamonds in Fe—C systems using nitrogen and hydrogen co-doped impurities under HPHT

Shi-Shuai Sun(孙士帅), Zhi-Hui Xu(徐智慧), Wen Cui(崔雯), Xiao-Peng Jia(贾晓鹏), Hong-An Ma(马红安)   

  1. 1 College of Science, Tianjin University of Technology, Tianjin 300384, China;
    2 College of Physics and Materials Science, Tianjin Normal University Tianjin 300387, China;
    3 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2017-05-05 修回日期:2017-05-25 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Shi-Shuai Sun E-mail:sssdashuai@163.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11504267, 11504269, and 51172089), the Open Project of State Key Laboratory of Superhard Materials, Jilin University, China (Grant No. 201504), and the Doctoral Fund of Tianjin Normal University, China (Grant No. 52XB1518).

Synthesis of diamonds in Fe—C systems using nitrogen and hydrogen co-doped impurities under HPHT

Shi-Shuai Sun(孙士帅)1, Zhi-Hui Xu(徐智慧)1, Wen Cui(崔雯)2, Xiao-Peng Jia(贾晓鹏)3, Hong-An Ma(马红安)3   

  1. 1 College of Science, Tianjin University of Technology, Tianjin 300384, China;
    2 College of Physics and Materials Science, Tianjin Normal University Tianjin 300387, China;
    3 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2017-05-05 Revised:2017-05-25 Online:2017-09-05 Published:2017-09-05
  • Contact: Shi-Shuai Sun E-mail:sssdashuai@163.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11504267, 11504269, and 51172089), the Open Project of State Key Laboratory of Superhard Materials, Jilin University, China (Grant No. 201504), and the Doctoral Fund of Tianjin Normal University, China (Grant No. 52XB1518).

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摘要：

In this study, we investigate the effect of nitrogen and hydrogen impurities on colors, morphologies, impurity structures and synthesis conditions of diamond crystals in Fe-C systems with C3N6H6 additives at pressures in the range 5.0-6.5 GPa and temperatures of 1400-1700 ℃ in detail. Our results reveal that the octahedron diamond nucleation in a Fe-C system is evidently inhibited by co-doped N-H elements, thereby resulting in the increase of minimum pressure and temperature of diamond synthesis by spontaneous nucleation. The octahedron diamond crystals synthesized from a pure Fe-C system are colorless, while they become green in the system with C3N6H6 additive. The surface defects of diamond will deteriorate when the nitrogen and hydrogen atoms simultaneously incorporate in the diamond growth environment in the Fe-C system. We believe that this study will provide some important information and be beneficial for the deep understanding of the crystallization of diamonds from different component systems.

关键词: high pressure and high temperature, diamond, N/H impurity, catalyst/solvent

Abstract:

In this study, we investigate the effect of nitrogen and hydrogen impurities on colors, morphologies, impurity structures and synthesis conditions of diamond crystals in Fe-C systems with C3N6H6 additives at pressures in the range 5.0-6.5 GPa and temperatures of 1400-1700 ℃ in detail. Our results reveal that the octahedron diamond nucleation in a Fe-C system is evidently inhibited by co-doped N-H elements, thereby resulting in the increase of minimum pressure and temperature of diamond synthesis by spontaneous nucleation. The octahedron diamond crystals synthesized from a pure Fe-C system are colorless, while they become green in the system with C3N6H6 additive. The surface defects of diamond will deteriorate when the nitrogen and hydrogen atoms simultaneously incorporate in the diamond growth environment in the Fe-C system. We believe that this study will provide some important information and be beneficial for the deep understanding of the crystallization of diamonds from different component systems.

Key words: high pressure and high temperature, diamond, N/H impurity, catalyst/solvent

中图分类号:  (Diamond)

  • 81.05.ug
81.10.Aj (Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation) 61.72.S- (Impurities in crystals)