Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion
BACKGROUND As the world's largest producer of synthetic diamonds, China accounts for more than 90% of the world's total production, of which high pressure-high temperature (HPHT) synthetic diamonds are dominant. Previous scholars have conducted many studies on analytical methods and proper...
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| Format: | Article |
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Science Press, PR China
2019-07-01
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| Series: | Yankuang ceshi |
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| Online Access: | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201811150122 |
| _version_ | 1828065019412086784 |
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| author | WU Xu-xu LU Tai-jin YANG Chi-yu ZHANG Jian TANG Shi CHEN Hua ZHANG Yong KE Jie HE Ming-yue |
| author_facet | WU Xu-xu LU Tai-jin YANG Chi-yu ZHANG Jian TANG Shi CHEN Hua ZHANG Yong KE Jie HE Ming-yue |
| author_sort | WU Xu-xu |
| collection | DOAJ |
| description | BACKGROUND As the world's largest producer of synthetic diamonds, China accounts for more than 90% of the world's total production, of which high pressure-high temperature (HPHT) synthetic diamonds are dominant. Previous scholars have conducted many studies on analytical methods and property analysis of HPHT synthetic diamonds. However, the research on the pickling process after the growth of HPHT synthetic diamonds and the internal and external micro-structures after pickling is still insufficient. OBJECTIVES To characterize 118 synthetic diamonds produced in China by high temperature and high pressure method. METHODS The HPHT synthetic diamonds were observed by laser scanning confocal microscopy (LSCM) and ultra-depth-of-field 3D microscopy, and the dark inclusions in these micro-structures were qualitatively analyzed by laser Raman spectroscopy. RESULTS Three structure types were found. Step-like growth structures with certain angles revealed the crystallographic characteristics of HPHT synthetic diamond poly-crystals. Near-parallel linear scratches reflected the contact relationship between diamond grains in the growth chamber. The 'rope-tied' structures reflected the growth rate of HPHT synthetic diamonds. CONCLUSIONS The micromorphology of these diamond surfaces reflects the growth conditions and environment of HPHT synthetic diamond gradient high temperature and continuous high pressure, which is of significance for the identification of HPHT synthetic diamonds. |
| first_indexed | 2024-04-10T23:07:40Z |
| format | Article |
| id | doaj.art-3b64abb41d0244309028e3797b1ca4b1 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T23:07:40Z |
| publishDate | 2019-07-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-3b64abb41d0244309028e3797b1ca4b12023-01-13T10:05:08ZengScience Press, PR ChinaYankuang ceshi0254-53572019-07-0138441141710.15898/j.cnki.11-2131/td.201811150122ykcs-38-4-411Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis DiscussionWU Xu-xu0LU Tai-jin1YANG Chi-yu2ZHANG Jian3TANG Shi4CHEN Hua5ZHANG Yong6KE Jie7HE Ming-yue8Research Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaResearch Institute of Beijing, National Gems & Jewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaSchool of Gemmology, China University of Geosciences(Beijing), Beijing 100083, ChinaBACKGROUND As the world's largest producer of synthetic diamonds, China accounts for more than 90% of the world's total production, of which high pressure-high temperature (HPHT) synthetic diamonds are dominant. Previous scholars have conducted many studies on analytical methods and property analysis of HPHT synthetic diamonds. However, the research on the pickling process after the growth of HPHT synthetic diamonds and the internal and external micro-structures after pickling is still insufficient. OBJECTIVES To characterize 118 synthetic diamonds produced in China by high temperature and high pressure method. METHODS The HPHT synthetic diamonds were observed by laser scanning confocal microscopy (LSCM) and ultra-depth-of-field 3D microscopy, and the dark inclusions in these micro-structures were qualitatively analyzed by laser Raman spectroscopy. RESULTS Three structure types were found. Step-like growth structures with certain angles revealed the crystallographic characteristics of HPHT synthetic diamond poly-crystals. Near-parallel linear scratches reflected the contact relationship between diamond grains in the growth chamber. The 'rope-tied' structures reflected the growth rate of HPHT synthetic diamonds. CONCLUSIONS The micromorphology of these diamond surfaces reflects the growth conditions and environment of HPHT synthetic diamond gradient high temperature and continuous high pressure, which is of significance for the identification of HPHT synthetic diamonds.http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201811150122synthetic diamondhigh pressure-high temperaturemicro-structurelaser scanning confocal microscopycrystal growth rate |
| spellingShingle | WU Xu-xu LU Tai-jin YANG Chi-yu ZHANG Jian TANG Shi CHEN Hua ZHANG Yong KE Jie HE Ming-yue Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion Yankuang ceshi synthetic diamond high pressure-high temperature micro-structure laser scanning confocal microscopy crystal growth rate |
| title | Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion |
| title_full | Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion |
| title_fullStr | Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion |
| title_full_unstemmed | Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion |
| title_short | Observation of Surface Microstructure of HPHT Synthetic Diamond Crystals and Genesis Discussion |
| title_sort | observation of surface microstructure of hpht synthetic diamond crystals and genesis discussion |
| topic | synthetic diamond high pressure-high temperature micro-structure laser scanning confocal microscopy crystal growth rate |
| url | http://www.ykcs.ac.cn/en/article/doi/10.15898/j.cnki.11-2131/td.201811150122 |
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