摘要
用国产SPD 6×1200型六面顶压机,在10%Fe/90%Fe70Ni30粉末触媒和石墨(Fe–C)体系中,在压力为5.0～5.5 GPa、温度为1 550～1 600 K下合成出柱状金刚石晶体。研究了晶体的形态和生长习性。结果表明:合成的柱状金刚石晶体的颜色呈现绿色,晶体的长度为0.6～0.8 mm,长径比约为2.0～2.5。晶体有两种完整晶形,分别沿着[100]和[111]方向生长。晶体的红外吸收光谱分析表明,柱状金刚石晶体的含氮量(1500×106)高于正常形状晶体的。
The column-shape diamond crystals were synthesized with a powder alloy catalyst of 10%（in mass）Fe/90%Fe70Ni30 and a graphite powder by a cubic anvil apparatus（Model SPD–6 × 1200） at 5.0–5.5 GPa and 1 550–1 600 K.The morphology and growth behavior of diamond crystal were investigated.The results show that the synthetic diamond crystals have a column-shape with light green color.The length range of the crystals was 0.6–0.8 mm with the length to diameter ratios of 2.0–2.5.The column-shape crystals had two main kinds of complete crystal shapes,namely,one elongated along the direction and another along the direction.It was indicated that the nitrogen content（1 500 × 10^6） of the synthetic diamond crystal was greater than that of the normal diamond crystal.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第8期1357-1360,共4页
Journal of The Chinese Ceramic Society
关键词
柱状金刚石
高温高压
触媒
石墨
column-shape diamond
high temperature high pressure
catalyst
graphite
