Synthesis of large diamond crystals containing high-nitrogen concentration at high pressure and high temperature using Ni-based solvent by temperature gradient method

被引：0

作者：

黄国锋 ^{[1
]}

贾晓鹏 ^{[1
,2
]}

李尚升 ^{[2
]}

张亚飞 ^{[1
]}

李勇 ^{[1
]}

赵明 ^{[1
]}

马红安 ^{[1
]}

机构：

[1] National Lab of Superhard Materials,Jilin University

[2] Henan Polytechnic University

来源：

Chinese Physics B | 2010年 / 11期

基金：

中国国家自然科学基金;

关键词：

high temperature and high pressure; nitrogen-doped diamond crystal; temperature gra-dient method; additive NaN 3;

D O I：

暂无

中图分类号：

O782 [晶体生长工艺];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

This paper reprots that with Ni-based catalyst/solvent and with a dopant of NaN 3,large green single crystal diamonds with perfect shape are successfully synthesized by temperature gradient method under high pressure and high temperature in a China-type cubic anvil high-pressure apparatus (SPD-6×1200),and the highest nitrogen concentration reaches approximately 1214-1257 ppm calculated by infrared absorption spectra.The synthesis conditions are about 5.5 GPa and 1240-1300 C.The growth behaviour of diamond with high-nitrogen concentration is investigated in detail.The results show that,with increasing the content of NaN 3 added in synthesis system,the width of synthesis temperature region for growth high-quality diamonds becomes narrower,and the morphology of diamond crystal is changed from cube-octahedral to octahedral at same temperature and pressure,the crystal growth rate is slowed down,nevertheless,the nitrogen concentration doped in synthetic diamond increases.

引用

页码：666 / 670

页数：5

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