含硅和GR1缺陷的蓝色CVD合成钻石的检测及颜色成因分析

张晓玉; 宋中华; 汪洋; 李梦; 刘美颖; 高博

doi:10.15964/j.cnki.027jgg.2023.03.001

含硅和GR1缺陷的蓝色CVD合成钻石的检测及颜色成因分析

张晓玉^1,,
宋中华^2, ,,
汪洋³,
李梦¹,
刘美颖¹,
高博¹

1.
国家珠宝玉石首饰检验集团有限公司北京实验室，北京 102600
2.
国家珠宝玉石首饰检验集团有限公司，北京 100013
3.
国家珠宝玉石首饰检验集团有限公司广州实验室，广东广州 510000

基金项目:

国家珠宝玉石首饰检验集团有限公司科研基金项目 NGTC20210100

国家珠宝玉石首饰检验集团有限公司科研基金项目 NGTC20220100

详细信息

作者简介:
张晓玉(1975-)，女，工程师，从事钻石鉴定与分级工作。E-mail: 109942650@qq.com

通讯作者:
宋中华(1975-)，女，高级工程师，从事天然、合成与处理钻石的研究与鉴定工作。E-mail: songzh@ngtc.com.cn

中图分类号: TS93
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出版历程
- 收稿日期: 2022-11-29
- 刊出日期: 2023-05-30

Blue CVD Synthetic Diamond Coloured by SiV and GR1 Defects

1.
National Gemstone Testing Center Beijing Lab, Beijing 102600, China
2.
National Gemstone Testing Center, Beijing 100013, China
3.
National Gemstone Testing Center Guangzhou Lab, Guangzhou 510000, China

摘要

摘要: 硅相关缺陷和辐照产生的空穴缺陷均可使CVD实验室生长钻石呈蓝色。近日，对一颗蓝色方形钻石样品进行显微放大观察、发光图像观察以及光谱学测试等，发现该样品为化学气相沉积法(CVD)合成钻石，红外光谱显示，该蓝色CVD合成钻石为Ⅱa型，未检测到与氢缺陷相关的吸收；紫外-可见-近红外吸收光谱显示, 除了在737 nm [SiV]^-和741 nm(GR1)处有非常强的吸收外，在830、856 nm和946 nm [SiV]⁰处观察到弱吸收，GR1产生的一系列吸收使该样品在蓝区透过，最终呈蓝色；激光拉曼光致发光光谱显示存在明显辐照特征，强的503.5 nm(3H)、强的741 nm(GR1)以及515.8、533.6 nm和580 nm等发光缺陷；H3(503.2 nm) 和H2 (986 nm)等缺陷的存在以及596/597 nm双峰的缺失，表明样品在辐照处理前经历过高温处理。
- 蓝色CVD合成钻石 /
- SiV缺陷 /
- GR1缺陷 /
- 辐照处理 /
- 高温高压处理
Abstract: Silicon-related defects and vacancy defects caused by irradiation can both cause the blue colour of CVD diamond. Recently, a blue square sample submitted to NGTC labs in Beijing, was identified as a CVD laboratory-grown diamond through magnification observation and luminescence observation under DiamondView^TM, and spectroscopic tests.The infrared spectrum indicated that the sample is type Ⅱa, and the absorption related to hydrogen defects is not detected. The UV-Vis-NIR spectrum showed weak absorption at 830, 856 nm and 946 nm assigned to [Si-V]⁰, and very strong absorption at 737 nm ([Si-V]^-)and 741 nm(GR1). A series of absorption generated by GR1 generate a transmission window at the blue area, finally making the sample blue. The photoluminescence spectra revealed obvious characteristics of irradiation, included the defects of strong 503.5 nm(3H), strong 741 nm(GR1), 515.8, 533.6 nm and 580 nm. The defects of H3(503.2 nm) and H2 (986 nm), and the absence of the 596/597 nm indicated that the sample had experienced high-temperature process before irradiation.
- blue CVD synthetic diamond /
- silicon vacancy defect /
- GR1 defect /
- radiation treatment /
- high temperature and high pressure treatment

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图 1 1.63 ct带灰色调的蓝色CVD合成钻石样品

Figure 1. The dusty blue CVD synthetic diamond with the weight of 1.63 ct

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图 2 超景深显微镜下蓝色CVD钻石样品内部包裹体特征：(a)细小点状深色包裹体，呈密集似云状物分布，×150；(b)近腰围处圆盘状深色包裹体，包裹体周围可见环状裂隙，×150.李梦拍摄.

Figure 2. Inclusions of the blue CVD synthetic diamoad sample observed under ultra-depth microscope: (a)tiny pinpoint dark inclusions in a cloud-like pattern, ×150;(b)round disc-shaped dark inclusion surrounded with tiny fracture, ×150.Photo by Li Meng.

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图 3 蓝色CVD合成钻石样品的红外吸收光谱

Figure 3. FTIR absorption spectrum of the blue CVD synthetic diamond sample

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图 4 常温和液氮温度下蓝色CVD合成钻石样品的紫外-可见-近红外吸收光谱

Figure 4. UV-Vis-NIR absorption spectra of the blue CVD synthetic diamond sample at room temperature and liquid nitrogen temperature

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图 5 液氮温度下和不同激发光源下激发蓝色CVD合成钻石样品的光致发光光谱：(a, b)473 nm激光器；(c)532 nm激光器；(d)785 nm激光器

Figure 5. Photoluminescence spectra of the CVD synthetic diamond sample at liquid nitrogen temperature: (a, b)473 nm laser excitation; (c)532 nm laser excitation; (d)785 nm laser excitation

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图 6 在DiamondView^TM下蓝色CVD合成钻石样品的冠部荧光(a)和亭部荧光(b)

Figure 6. Fluorescence of the table (a) and pavilion(b) of the blue CVD synthetic diamond sample under DiamondView^TM

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