Synthesis and characterization of gem diamond single crystals in Fe-C system under high temperature and high pressure

被引：0

作者：

Wang, Zhanke ^{[1
]}

Ma, Hongan ^{[1
]}

Fang, Shuai ^{[1
]}

Yang, Zhiqiang ^{[1
]}

Miao, Xinyuan ^{[1
]}

Chen, Liangchao ^{[2
]}

Jia, Xiaopeng ^{[1
]}

机构：

[1] State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun,130012, China

[2] Key Laboratory of Material Physics of Ministry of Education, School of Physical Engineering, Zhengzhou University, Zhengzhou,450052, China

来源：

Journal of Crystal Growth | 2020年 / 531卷

关键词：

In this paper; the diamond large single crystals were successfully synthesized in the pure Fe-C system by temperature gradient growth (TGG) method in China-type cubic anvil high-pressure apparatus (CHPA) at 5.8 GPa and 1550 °C. The synthesized diamonds were characterized by Optical microscopy; Infrared spectroscopy; Raman spectroscopy and Photoluminescence (PL) spectroscopy. The results show that the nitrogen concentration of type Ib diamonds synthesized in pure Fe-C system is about 80 ppm; which is much lower than diamonds synthesized by Ni-based and Fe-based alloys. PL spectra result indicated that there were no peaks related to the NV centers in diamonds synthesized by Fe-C system. In addition; high-quality type IIa gem diamond can be synthesized by adding a small amount of nitrogen getter in the pure Fe-C system. We believe that this work is of great significance for the synthesis of high-purity large single type IIa diamonds without impurities such as nitrogen and metals. © 2019 Elsevier B.V;

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