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A New Dopant of NaN3 for High-Concentration-Nitrogen Diamond Synthesized by HPHT |
| LIANG Zhong-Zhu1;JIA Xiao-Peng1;Hisao Kanda2;MA Hong-An1;WANG Dong-Mei3;LIU Wan-Qiang1;YU Run-Ze1 |
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1 National Lab of Superhard Materials, Jilin University, Changchun 130012
2 National Institute for Materials Science,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
3 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 |
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| Cite this article: |
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LIANG Zhong-Zhu, JIA Xiao-Peng, Hisao Kanda et al 2007 Chin. Phys. Lett. 24 559-562 |
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Abstract Nitrogen is successfully doped in diamond by adding sodium azide (NaN3) as the source of nitrogen to the graphite and iron powders. The diamond crystals with high nitrogen concentration, 1000--2200ppm, which contain the same concentrations of nitrogen with natural diamond, have been synthesized by using the system of iron-carbon-additive NaN3. The nitrogen concentrations in diamond increase with the increasing content of NaN3. When the content of NaN3 is increased to 0.7--1.3wt.%, the nitrogen concentration in the diamond almost remains in a nitrogen concentration range from 1250ppm to 2200ppm, which is the highest value and several times higher than that in the diamond synthesized by a conventional method without additive NaN3 under high pressure and high temperature (HPHT) conditions.
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| Keywords:
81.05.Uw
81.10.Aj
61.72.Ss
85.40.Ry
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Received: 05 July 2006
Published: 24 February 2007
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| PACS: |
81.05.Uw
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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61.72.Ss
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85.40.Ry
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(Impurity doping, diffusion and ion implantation technology)
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