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Synthesis and nitrogen content regulation of diamond in a high-pressure hydrogen-rich environment

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The regulating nitrogen content of diamond in a hydrogen-rich high-temperature and high-pressure(HPHT)growth environment was systematically investigated in this work by developing three growth systems,namely,"FeNi+Ti","FeNi+C3N6H6",and"FeNi+Ti+C3N6H6".Optical microscopy,infrared spectroscopy,and photoluminescence(PL)spectroscopy measurements were conducted to analyze the spectroscopic characteristics of diamonds grown in these three systems.From our analysis,it was demonstrated that the presence of hydrogen in the sp3 hybrid C-H does not directly affect the color of the diamond and facilitates the increase of the nitrogen-vacancy(NV)center concentration in a high-nitrogen-content diamond.In addition,titanium plays an important role in nitrogen removal,while its impact on hydrogen doping within the diamond lattice is insignificant.Most importantly,by regulating the ratio of nitrogen impurities that coexist in the nitrogen and hydrogen HPHT environment,the production of hydrogenous Ⅱa-type diamond,hydrogenous Ib-type diamond,and hydrogenous high-nitrogen-type diamonds was achieved with a nitrogen content of less than 1 ppm to 1600 ppm.

diamondHPHTsuperhard materialhydrogen-rich environment

黄国锋、陈良超、房超

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Inner Mongolia Key Laboratory of High-pressure Phase Functional Materials,Chifeng University,Chifeng 024000,China

Key Laboratory of Material Physics of Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China

国家自然科学基金国家自然科学基金Open Project of Inner Mongolia Key Laboratory of Highpressure Phase Functional Materials,Chifeng UniversityScience and Technology Project of Xilinguole Province河南省自然科学基金

1227437312004341cfxygy202301202209242300421155

2024

10.1088/1674-1056/ad2a6d

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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