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Volume 17 Issue 3
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Chinese Journal of High Pressure Physics  > 2003  >  17(3): 199-203 .
WEN Chao, SUN De-Yu, GUAN Jin-Qing, LIU Xiao-Xin, LI Xun, ZHOU Gang, LIN Jun-De, JIN Zhi-Hao. The Determination of Melting-Point and Debye Characteristic Temperature of Nano-Diamond from X-Ray Diffraction Intensities[J]. Chinese Journal of High Pressure Physics, 2003, 17(3): 199-203 . doi: 10.11858/gywlxb.2003.03.007
Citation: WEN Chao, SUN De-Yu, GUAN Jin-Qing, LIU Xiao-Xin, LI Xun, ZHOU Gang, LIN Jun-De, JIN Zhi-Hao. The Determination of Melting-Point and Debye Characteristic Temperature of Nano-Diamond from X-Ray Diffraction Intensities[J]. Chinese Journal of High Pressure Physics, 2003, 17(3): 199-203 . doi: 10.11858/gywlxb.2003.03.007
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The Determination of Melting-Point and Debye Characteristic Temperature of Nano-Diamond from X-Ray Diffraction Intensities

doi: 10.11858/gywlxb.2003.03.007
  • 1.

    State Key Laboratory Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

  • 2.

    Northwest Institute of Nuclear Technology, Xi'an 710024, China

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  • Corresponding author: WEN Chao
  • Received Date: 09 Jul 2002
  • Rev Recd Date: 10 Nov 2002
  • Issue Publish Date: 05 Sep 2003
    Abstract
  • The melting-point of nano-diamond was reported in this paper. The Debye characteristic temperature of nano-diamond was calculated based on X-ray diffraction intensities by the methods introduced by LU Xue-Shan and LIANG Jing-Kui. Its Debye characteristic temperature is 411.7 K, which is about one-fifth of the Debye characteristic temperature of bulk diamond single crystal synthesized under high temperature and high-pressure condition. The melting point of nano-diamond is 2 070 K calculated with Lindemann's formula. The atom vibration amplitude, which deflected balance position, increases two times or more. This leads to the increasing of activity of nano-diamond.

     

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