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高温高压下Cu在IIa型金刚石大单晶Ti除氮反应中的作用机理

郭明明 李尚升 冯璐 胡美华 宿太超 高广进 王君卓 尤悦 聂媛

郭明明, 李尚升, 冯璐, 胡美华, 宿太超, 高广进, 王君卓, 尤悦, 聂媛. 高温高压下Cu在IIa型金刚石大单晶Ti除氮反应中的作用机理[J]. 新型炭材料, 2020, 35(5): 559-566. doi: 10.1016/S1872-5805(20)60509-1
引用本文: 郭明明, 李尚升, 冯璐, 胡美华, 宿太超, 高广进, 王君卓, 尤悦, 聂媛. 高温高压下Cu在IIa型金刚石大单晶Ti除氮反应中的作用机理[J]. 新型炭材料, 2020, 35(5): 559-566. doi: 10.1016/S1872-5805(20)60509-1
GUO Ming-ming, LI Shang-sheng, FENG Lu, HU Mei-hua, SU Tai-chao, GAO Guang-jin, WANG Jun-zhuo, YOU Yue, NIE Yuan. The effect of adding Cu on the nitrogen removal efficiency of Ti for the synthesis of a large type IIa diamond under high temperature and high pressure[J]. NEW CARBON MATERIALS, 2020, 35(5): 559-566. doi: 10.1016/S1872-5805(20)60509-1
Citation: GUO Ming-ming, LI Shang-sheng, FENG Lu, HU Mei-hua, SU Tai-chao, GAO Guang-jin, WANG Jun-zhuo, YOU Yue, NIE Yuan. The effect of adding Cu on the nitrogen removal efficiency of Ti for the synthesis of a large type IIa diamond under high temperature and high pressure[J]. NEW CARBON MATERIALS, 2020, 35(5): 559-566. doi: 10.1016/S1872-5805(20)60509-1

高温高压下Cu在IIa型金刚石大单晶Ti除氮反应中的作用机理

doi: 10.1016/S1872-5805(20)60509-1
基金项目: 河南省自然科学基金项目(182300410279,182300410248);河南省高校基本科研业务费专项资金(NSFRF180408);河南省科技攻关项目(182102210311);河南省高等学校青年骨干教师培养计划(2018GGJS057);河南省高校科技创新团队(19IRTSTHN027);河南省高校重点科研项目(18A430017,20B140009).
详细信息
    作者简介:

    郭明明,硕士研究生.E-mail:guomm20@163.com

    通讯作者:

    李尚升,博士,副教授.E-mail:lishsh@hpu.edu.cn

  • 中图分类号: TQ127.1+1

The effect of adding Cu on the nitrogen removal efficiency of Ti for the synthesis of a large type IIa diamond under high temperature and high pressure

Funds: Natural Science Foundation of Henan Province (182300410279 and 182300410248), Fundamental Research Funds for the Universities of Henan Province (NSFRF180408), Project for Key Science and Technology Research of Henan Province, China (182102210311), Training Plan of Young Key Teachers in Colleges and Universities of Henan Province (2018GGJS057), Program for Innovative Research Team (in Science and Technology) in the University of Henan Province (19IRTSTHN027), Key scientific research project in colleges and Universities of Henan Province, China (18A430017, 20B140009).
  • 摘要: 研究Cu在高温高压下Ti除氮反应中的作用机理,对合成优质的Ⅱa型金刚石晶体具有重要意义。本研究在FeNi-C体系中添加Ti和Ti/Cu或TiC和TiC/Cu,在5.6 GPa和1 543 K的条件下使用温度梯度法制备了金刚石大单晶,并使用光学显微镜和红外光谱仪对样品进行表征。结果表明,Ti或TiC分别与N反应生成TiN和Ti(C1-x,Nx)。这种情况下,单独添加Ti或TiC除氮效果差,所合成金刚石晶体中会出现大量的包裹体和凹坑。这是由于反应生成的TiN、TiC和Ti(C1-x,Nx)杂质严重影响晶体质量的结果。Ti或TiC分别与Cu共掺杂,可以促进TiC的分解释放Ti,提高除氮效率,并逐渐减少晶体合成中的缺陷和包裹体数量。这说明Cu的添加量应明显小于Ti,这与普通Ti和Cu的添加比例1∶1不同。最终结果表明,当Ti/Cu质量分数为1.70%/1.06%(Ti∶Cu=1∶0.625)时,可以合成出高质量的Ⅱa型金刚石晶体。
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出版历程
  • 收稿日期:  2020-03-01
  • 修回日期:  2020-04-23
  • 刊出日期:  2020-10-28

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