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Synthesis of carbon nitride crystals at high pressures and temperatures

Published online by Cambridge University Press:  31 January 2011

D. W. He ,
F. X. Zhang ,
X. Y. Zhang ,
Z. C. Qin ,
M. Zhang ,
R. P. Liu ,
Y. F. Xu  and
W. K. Wang
D. W. He
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
F. X. Zhang
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
X. Y. Zhang
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
Z. C. Qin
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
M. Zhang
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
R. P. Liu
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34), Beijing 100080, People's Republic of China and Yan Shan University, Qinhuandao 006604, People's Republic of China
Y. F. Xu
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34),Beijing 100080, People's Republic of China
W. K. Wang
Affiliation:
Institute of Physics, Chinese Academy of Science, P.O. Box 603 (34), Beijing 100080, People's Republic of China and Yan Shan University, Qinhuandao 006604, People's Republic of China
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Abstract

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.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 12 , December 1998 , pp. 3458 - 3462
Copyright
Copyright © Materials Research Society 1998

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