Synthesis of carbon nitride crystals at high pressures and temperatures

被引：0
|
作者：
D. W. He
F. X. Zhang
X. Y. Zhang
Z. C. Qin
M. Zhang
R. P. Liu
Y. F. Xu
W. K. Wang
机构：
[1] Institute of Physics,
[2] Chinese Academy of Science,undefined
[3] Yan Shan University,undefined
来源：
Journal of Materials Research | 1998年 / 13卷
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摘要：
Carbon nitride crystals have been synthesized from C3N4H4 in the presence of a nickel-based alloy or cobalt as a catalyst at high pressure of 7 GPa and temperature of about 1400 °C. Scanning electron microscopy showed rod-like, well-faceted crystals with size of several micrometers, and the N content in these carbon nitride crystals was 47–62%. X-ray diffraction indicated the crystals were composed of α–C3N4 and β–C3N4. The experimental lattice constants of α–C3N4 (a = 6.425 Å, c = 4.715 Å ) and β–C3N4 (a = 6.419 Å, c = 2.425 Å ) agree with ab initio calculations very well.
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页码：3458 / 3462
页数：4
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