摘要High quality Ib gem diamond single crystals were synthesized in cubic anvil high-pressure apparatus (SPD-6×1200) under 5.4GPa and 1230°C--1280°C. The (100) face of seed crystal was used as growth face, and Ni70Mn25Co5 alloy was used as solvent/catalyst. The dependence of crystal quality and β value (the ratio of height to diameter of diamond crystal) on synthesis temperature was studied. When the synthesis temperature is between 1230°C and 1280°C, the β value of the synthetic high-quality gem diamond crystals is between 0.4 and 0.6. The results show that when the β value is between 0.4 and 0.45, the synthetic diamonds are sheet-shape crystals; however, when the β value is between 0.45 and 0.6, the synthetic diamonds are tower-shape crystals. In addition, when the β value is less than 0.4, skeleton crystals will appear. When the β value is more than 0.6, most of the synthetic diamond crystals are inferior crystals.
Abstract：High quality Ib gem diamond single crystals were synthesized in cubic anvil high-pressure apparatus (SPD-6×1200) under 5.4GPa and 1230°C--1280°C. The (100) face of seed crystal was used as growth face, and Ni70Mn25Co5 alloy was used as solvent/catalyst. The dependence of crystal quality and β value (the ratio of height to diameter of diamond crystal) on synthesis temperature was studied. When the synthesis temperature is between 1230°C and 1280°C, the β value of the synthetic high-quality gem diamond crystals is between 0.4 and 0.6. The results show that when the β value is between 0.4 and 0.45, the synthetic diamonds are sheet-shape crystals; however, when the β value is between 0.45 and 0.6, the synthetic diamonds are tower-shape crystals. In addition, when the β value is less than 0.4, skeleton crystals will appear. When the β value is more than 0.6, most of the synthetic diamond crystals are inferior crystals.
XIAO Hong-Yu;JIA Xiao-Peng;ZANG Chuan-Yi;LI Shang-Sheng;TIAN Yu;ZHANG Ya-Fei;HUANG Guo-Feng;MA Li-Qiu;MA Hong-An. Dependence of Crystal Quality and β Value on Synthesis Temperature in Growing Gem Diamond Crystals[J]. 中国物理快报, 2008, 25(4): 1469-1471.
XIAO Hong-Yu, JIA Xiao-Peng, ZANG Chuan-Yi, LI Shang-Sheng, TIAN Yu, ZHANG Ya-Fei, HUANG Guo-Feng, MA Li-Qiu, MA Hong-An. Dependence of Crystal Quality and β Value on Synthesis Temperature in Growing Gem Diamond Crystals. Chin. Phys. Lett., 2008, 25(4): 1469-1471.
[1] Yoder M N 1991 Diamond and Diamond-Like Films and Coatings edClausing R E, Horton L L, Angus J C and Koidl P (New York: Plenum) p 1 [2] Jayaraman A 1983 Rev. Mod. Phys. 55 65 [3] Toda N, Sumiya H, Satoh S and Ishikawa T 1997 Proc. SPIE 3151 329 [4] Yamamoto M, Kumasaka T and Ishikawa T 2000 Rev. High Press.Sci. Technol. 10 56 [5] Sumiya H, Toda N and Satoh S 1999 Rev. High Press. Sci.Technol. 9 255 [6] Isoya J, Kanda H, Akaishi M, Morita Y and Ohsima T 1997 Diamond Rel. Mater. 6 356 [7] Chen Y C, Yan C S, Mao H K and Hemley R J 2004 First AnnualSSAAP Symposium (Albuquerque, NM, March 29--31 2004) [8] Yan C S, Chen Y C, Ho S S, Mao H K and Hemley R J 2005 The10th International Conference on New Diamond Science and Technology(Tsukuba, Japan, May 11--14 2005) [9] Yan C S, Chen Y C, Ho S S, Mao H K and Hemley R J 2005 8thApplied Diamond Conference, Nanocarbon (Argonne National Laboratory,Argonne, Illinois, May 15--19 2005) [10] Sumiya H, Toda N and Satoh S 2002 J. Cryst. Growth 237-239 1281
2008, Vol. 25 
