Co-Nb-C体系下金刚石单晶生长的研究
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摘要
本文在国产SPD6×1400六面顶压机上,在高温高压条件下(5.7GPa,1300～1400℃)下,采用籽晶的{100}面作为外延生长面,以金属铌为添加剂,以金属钴为催化剂,使用温度梯度法,进行了Ib型宝石级金刚石单晶的生长研究.实验室结果表明:触媒中金属铌的添加使得生长的晶体在形貌、颜色、生长速度方面都发生了明显变化,适量铌的添加可以生长出优质黄色Ib型金刚石单晶.红外测试结果表明,晶体颜色的改变主要由晶体中的氮杂质含量变化引起的.当过高含量铌添加在触媒中时(6wt.%),金刚石晶体的底面出现十分粗糙的状态.
引文
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[3]Tian Y, Jia X P, Zang C Y, Li S S, Xiao H Y,Zhang Y F, Huang G F, Li R, Han Q G, Ma L Q, Li Y, Chen X Z, Zhang C and Ma H A,Chinese Science Bulletin[J]. 2009, 54:1459.
[4]Sumiya H, Harano K, Tamasaku K, Diam Relat. Mat.[J]. 2015, 58:221.
[5]Huang G F, Jia X P, Yin J W, Ma H A and Zheng Y J, Refractory Metals and Hard Materials[J]. 2013, 41:517.
[6]Palyanov Y N, Khokhryakov A F, Borzdov Y M and Kupriyanov I N Cryst. Growth Des.[J]. 2013,13:5411.
[7]Zheng Y J, Huang G F, Li Z C and Zuo G H Chin. Phys. B.[J]. 2014, 23:579.
[8]Yan B M, Jia X P, Fang C, Chen N, Li Y D, Sun S S and Ma H A, Refractory Metals and Hard Materials[J]. 2016,54:309.
[9]Huang GF, Jia XP, Li Y, Hu MH, Li ZC,Yan BM, et al. Growth of gem-grade diamond crystals heavily doped with the additive of Ba(N3)2. Chin Phys B[J]. 2011,20:78103.
[10]Huang GF, Jia XP, Li SS, Zhang YF, Li Y,ZhaoM, et al. Synthesis of large diamond crystals containing high-nitrogen at high pressure and high temperature using Ni-based solvent by temperature gradient method. Chin Phys B[J]. 2010,19:118101.
[11]Huang GF, Jia XP, Li SS, Hu MH, Li Y,Zhao M, et al. Effects of additive NaN3 on the HPHT synthesis of large single crystal diamond grown by TGM. Sci China Ser G Phys Mech Astron[J]. 2010,53:1831-5.