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在HPHT条件下,CH₆N₄O添加剂对来自Ni基合金的Ib型钻石的影响

Longsuo Guo¹, Shuai Fang², Jing Zhang¹

¹Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250014, China.

|February 17, 2025

概括

科学家们使用碳--氧- (C-H-O-N) 系统合成了高质量的钻石. 这项研究通过模仿其元素组成来探索天然钻石生长机制.

科学领域:

材料科学材料科学材料科学
地质化学地质化学
晶体学晶体学是指结晶学.

背景情况:

自然钻石含有碳,,氧和等元素,存在于它们的生长环境中.
复制C-H-O-N系统对于理解天然钻石形成至关重要.
之前的研究集中在天然钻石含的元素组成上.

研究的目的:

在受控的C-H-O-N系统中合成钻石晶体.
研究有机添加剂对钻石生长和缺陷形成的影响.
为了分析,氧和的合并到合成钻石中.

主要方法:

在NiMnCo-C系统中使用碳水化合物添加剂进行高压和高温合成.
使用光学显微镜 (OM),拉曼光谱,X射线衍射 (XRD),里埃变换红外光谱 (FTIR) 和X射线光电子光谱 (XPS) 的表征.

主要成果:

在12801320°C和5.46.0 GPa.成功合成了钻石晶体.
观察到新的延伸缺陷类似于位移,垂直于{111}面,由添加剂引起.
通过Raman和XRD在合成钻石中确认了高质量的sp3结构.
FTIR分析显示了含量的变化与合成温度和压力.
XPS证实了成功地将N,O和H纳入钻石网格.

结论:

使用碳水化合物的C-H-O-N系统使得仿制自然条件的钻石合成成为可能.
有机添加剂会影响缺陷的形成和的吸收.
合成钻石表现出高质量的结构,与纳入的N,O和H,提供了对天然钻石起源的见解.

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