Synthesis of large diamond single crystals under high pressure and high temperature through effective utilization of the synthesis cavity

CrystEngComm ◽  
2018 ◽  
Vol 20 (29) ◽  
pp. 4127-4132 ◽  
Author(s):  
Yong Li ◽  
Yadong Li ◽  
Ying Wang ◽  
Jie Zhang ◽  
Mousheng Song ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Production Efficiency ◽  
Effective Utilization ◽  
Diamond Crystals ◽  
Diamond Single Crystals ◽  
Large Diamond

To make maximal use of the synthesis cavity and improve the production efficiency, we designed the double seed bed method to synthesize large diamond crystals under high pressure and high temperature (HPHT) conditions, and the results were both theoretically calculated and verified by experiments.

scholarly journals Research progress of large diamond single crystals under high pressure and high temperature

2020 ◽  
Vol 69 (23) ◽  
pp. 238101
Author(s):  
Yue You ◽  
Shang-Sheng Li ◽  
Tai-Chao Su ◽  
Mei-Hua Hu ◽  
Qiang Hu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Research Progress ◽  
Diamond Single Crystals ◽  
Large Diamond

HPHT Growth and IR Characterizaton of Large Diamond Crystals in FeNi-C-FeS Systems

2011 ◽  
Vol 339 ◽  
pp. 491-495
Author(s):  
Chuan Yi Zang ◽  
Lun Jian Chen ◽  
Li Xue Chen
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Boron Content ◽  
Diamond Crystals ◽  
Growth System ◽  
Negative Effect ◽  
Temperature Gradient Method ◽  
Co Doped ◽  
Large Diamond

By temperature gradient method (TGM), with Invar alloy as solvent catalyst, FeS and boron as additives, large diamond crystals are grown under high pressure and high temperature (HPHT) of about 5.4GPa and 1550K. With the content of FeS increased, the colors of grown crystals would be changed from transparent yellow to opaque gray-black, and the quality of diamond crystals could also be destroyed markedly. When both boron and FeS co-doped, the negative effect of FeS on crystal quality could be eliminated somewhat. To a certain content of FeS, with the boron content increased, the crystal color would be changed from opaque gray-black to transparent yellow, and boron content needed is related directly to FeS content in growth systems. The nitrogen content in diamond lattice decreases greatly, with FeS content increased in the growth system, and a 1050cm-1 absorption peak in IR spectrum is also present in diamond crystals grown in FeNi-FeS-C system.

Observation of etch pits and defects in diamond single crystals prepared under high temperature–high pressure

2001 ◽  
Vol 315 (1-2) ◽  
pp. 108-112 ◽  
Author(s):  
Long-Wei Yin ◽  
Mu-Sen Li ◽  
Dong-Sheng Sun ◽  
Zhao-Yin Hao ◽  
Feng-Zhao Li ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Etch Pits ◽  
Diamond Single Crystals ◽  
High Temperature High Pressure

Defect formation in diamond single crystals grown from the Fe-Ni-C system at high temperature and high pressure

2001 ◽  
Vol 36 (13-14) ◽  
pp. 2283-2288 ◽  
Author(s):  
Long-Wei Yin ◽  
Mu-Sen Li ◽  
Feng-Zhao Li ◽  
Dong-Sheng Sun ◽  
Zhao-Yin Hao
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Defect Formation ◽  
Diamond Single Crystals

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

2020 ◽  
Vol 531 ◽  
pp. 125371
Author(s):  
Zhanke Wang ◽  
Hongan Ma ◽  
Shuai Fang ◽  
Zhiqiang Yang ◽  
Xinyuan Miao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Synthesis And Characterization ◽  
Diamond Single Crystals

Synthesis and characterization of diamonds using C3H5N3O as an organic additive under high pressure and high temperature

CrystEngComm ◽  
2018 ◽  
Vol 20 (36) ◽  
pp. 5457-5464 ◽  
Author(s):  
Longsuo Guo ◽  
Hongan Ma ◽  
Liangchao Chen ◽  
Ning Chen ◽  
Xinyuan Miao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Organic Additive ◽  
Synthesis And Characterization ◽  
Diamond Single Crystals

In the NiMnCo–C system, diamond single crystals have been successfully synthesized by adding C3H5N3O as an organic additive under 5.5–6.2 GPa and 1280–1320 °C.

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