| Different effect of NiMnCo or FeNiCo on the growth of type-Ⅱa large diamonds with Ti/Cu as nitrogen getter |
| |
| 引用本文： | 李尚升,张贺,宿太超,胡强,胡美华,龚春生,马红安,贾晓鹏,李勇,肖宏宇.Different effect of NiMnCo or FeNiCo on the growth of type-Ⅱa large diamonds with Ti/Cu as nitrogen getter[J].中国物理 B,2017,26(6):68102-068102. |
| |
| 作者姓名： | 李尚升 张贺 宿太超 胡强 胡美华 龚春生 马红安 贾晓鹏 李勇 肖宏宇 |
| |
| 作者单位： | 1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;2.State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;3.School of Data Science, Tongren University, Tongren 554300, China;4.Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, China |
| |
| 摘 要： | In order to synthesize high-quality type-Ⅱa large diamond, the selection of catalyst is very important, in addition to the nitrogen getter. In this paper, type-IIa large diamonds are grown under high pressure and high temperature(HPHT) by using the temperature gradient method(TGM), with adopting Ti/Cu as the nitrogen getter in Ni_(70)Mn_(25)Co_5(abbreviated as NiMnCo) or Fe_(55)Ni_(29)Co_(16)(abbreviated FeNiCo) catalyst. The values of nitrogen concentration(N_c) in both synthesized high-quality diamonds are less than 1 ppm, when Ti/Cu(1.6 wt%) is added in the FeNiCo or Ti/Cu(1.8 wt%) is added in the NiMnCo. The difference in solubility of nitrogen between both catalysts at HPHT is the basic reason for the different effect of Ti/Cu on eliminating nitrogen. The nitrogen-removal efficiency of Ti/Cu in the NiMnCo catalyst is less than in the FeNiCo catalyst. Additionally, a high-quality type-Ⅱa large diamond size of 5.0 mm is obtained by reducing the growth rate and keeping the nitrogen concentration of the diamond to be less than 1 ppm, when Ti/Cu(1.6 wt%) is added in the FeNiCo catalyst.
|
| 收稿时间： | 2017-01-17 |
Different effect of NiMnCo or FeNiCo on the growth of type-IIa large diamonds with Ti/Cu as nitrogen getter |
| |
| Affiliation: | 1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;2.State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;3.School of Data Science, Tongren University, Tongren 554300, China;4.Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, China |
| |
| Abstract: | In order to synthesize high-quality type-IIa large diamond, the selection of catalyst is very important, in addition to the nitrogen getter. In this paper, type-IIa large diamonds are grown under high pressure and high temperature (HPHT) by using the temperature gradient method (TGM), with adopting Ti/Cu as the nitrogen getter in Ni70Mn25Co5 (abbreviated as NiMnCo) or Fe55Ni29Co16 (abbreviated FeNiCo) catalyst. The values of nitrogen concentration (Nc) in both synthesized high-quality diamonds are less than 1 ppm, when Ti/Cu (1.6 wt%) is added in the FeNiCo or Ti/Cu (1.8 wt%) is added in the NiMnCo. The difference in solubility of nitrogen between both catalysts at HPHT is the basic reason for the different effect of Ti/Cu on eliminating nitrogen. The nitrogen-removal efficiency of Ti/Cu in the NiMnCo catalyst is less than in the FeNiCo catalyst. Additionally, a high-quality type-IIa large diamond size of 5.0 mm is obtained by reducing the growth rate and keeping the nitrogen concentration of the diamond to be less than 1 ppm, when Ti/Cu (1.6 wt%) is added in the FeNiCo catalyst. |
| |
| Keywords: | high pressure and high temperature catalyst nitrogen getter type-IIa large diamond |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
