摘要Using three kinds of graphites with different graphitization degrees as carbon source and Fe--Ni alloy powder as catalyst, the synthesis of diamond crystals is performed in a cubic anvil high-pressure and high-temperature apparatus (SPD-6×1200). Diamond crystals with perfect hexoctahedron shape are successfully synthesized at pressure from 5.0 to 5.5GPa and at temperature from 1570 to 1770K. The synthetic conditions, nucleation, morphology, inclusion and granularity of diamond crystals are studied. The temperature and pressure increase with the increase of the graphitization degree of graphite. The quantity of nucleation and granularity of diamonds decreases with the increase of graphitization degree of graphite under the same synthesis conditions. Moreover, according to the results of the Mossbauer spectrum, the composition of inclusions is mainly Fe3C and Fe-Ni alloy phases in diamond crystals synthesized with three kinds of graphites.
Abstract：Using three kinds of graphites with different graphitization degrees as carbon source and Fe--Ni alloy powder as catalyst, the synthesis of diamond crystals is performed in a cubic anvil high-pressure and high-temperature apparatus (SPD-6×1200). Diamond crystals with perfect hexoctahedron shape are successfully synthesized at pressure from 5.0 to 5.5GPa and at temperature from 1570 to 1770K. The synthetic conditions, nucleation, morphology, inclusion and granularity of diamond crystals are studied. The temperature and pressure increase with the increase of the graphitization degree of graphite. The quantity of nucleation and granularity of diamonds decreases with the increase of graphitization degree of graphite under the same synthesis conditions. Moreover, according to the results of the Mossbauer spectrum, the composition of inclusions is mainly Fe3C and Fe-Ni alloy phases in diamond crystals synthesized with three kinds of graphites.
(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
引用本文:
LIU Wan-Qiang;MA Hong-An;LI Xiao-Lei;LIANG Zhong-Zhu;LIUMi-Lan;LI Rui;JIA Xiao-Peng;. Effect of Carbon Source with Different Graphitization Degrees on the Synthesis of Diamond[J]. 中国物理快报, 2007, 24(6): 1749-1752.
LIU Wan-Qiang, MA Hong-An, LI Xiao-Lei, LIANG Zhong-Zhu, LIUMi-Lan, LI Rui, JIA Xiao-Peng,. Effect of Carbon Source with Different Graphitization Degrees on the Synthesis of Diamond. Chin. Phys. Lett., 2007, 24(6): 1749-1752.
[1] Bundy F P, Hall H T, Strong H M and Wentorf R W 1955 Nature 176 51 [2] Bovenkerk H B, Bundy F P, Hall H T, Strong H M and Wentorf R W1959 Nature 184 1094 [3] L Gou, S Hong and Q Gou 1994 Advances in New Diamond Science andTechnology (Tokyo: Ohm) chap 8 p 513 [4] Ganevic L G, Nagopmyj V G and Sipkov N N 1997 Synth. Diamonds 3 6 [5] Tsuzuki A, Hirano S I and Naka S 1984 J. Mater. Sci. 191153 [6] Kasatochkin V I, Shcerenberg L E, Siesarev V N and Dokl Yu N 1974 Akad. Nauk 194 801 [7] Tsuzuki A, Hirano S J and Naka S 1985 J. Mater. Sci. 202260 [8] Skury A L D, Bobrovnitchii G S and Monteiro S N 2004 Diamond Relat. Mater. 13 1725 [9] Choi J Y, Eun K Y, Kim J S and Kang S J L 1998 Diamond Relat.Mater. 7 1196 [10] Wakatsuki M 1966 Jpn. J. Appl. Phys. 5 337
2007, Vol. 24 
