彩色钻石的DiamondView^(TM)图像与光谱学特征研究  

Study on the DiamondView^(TM) patterns and spectral characteristics of colored diamonds

作　　者：严俊[1,2] 陶金波 刘晓波[3] 章丹 方飚 严雪俊 周德坤[3] 

机构地区：[1]浙江省质量检测科学研究院,浙江杭州310013 [2]浙江大学材料科学与工程系,浙江杭州310027 [3]北华大学机械学院,吉林吉林132021 [4]浙江至公检测有限公司,浙江杭州310009

出　　处：《中国测试》2016年第2期45-50,共6页China Measurement & Test

基　　金：浙江省质量监督系统科研计划项目(20130207)

摘　　要：通过紫外-可见(UV-Vis)吸收光谱、傅里叶变换红外(FTIR)光谱及钻石观测仪(DiamondView^(TM))对天然钻石、经辐照或高温高压处理的天然钻石、高温高压(HTHP)合成钻石进行较系统的光谱及荧光图像对比研究。结果表明:经辐照后的部分钻石可以产生GR1色心缺陷,表现为该类样品的UV-Vis吸收光谱中存在741 nm处吸收峰,但该处因辐照所致的特征吸收线可能因样品经后期高温高压处理而消失。此外,并非所有钻石在经辐照后其红外光谱中都存在1 450 cm^(-1)处的吸收峰位,基于UV-Vis与FTIR光谱结论可见,经同种处理工艺的钻石的光谱学特征也存在特异性;DiamondView^(TM)钻石观测仪在对彩色钻石荧光发光模式进行检测时发现,除出现典型的荧光结构模式外,部分样品的内部结构条纹与CVD合成钻石的生长沉积线相似,因此针对钻石自然或者人工合成的属性进行定性判断时应辅以FTIR与UV-Vis吸收光谱等方法综合分析。A systematic comparative study on natural diamonds, annealed and irradiated natural diamonds, and synthetic diamonds prepared by high temperature and high pressure （HTHP） was carried out by the UV-Vis-NIR absorption spectrum, FTIR spectra and DiamondViewTM. The results show that some of the irradiated diamonds can result in GR1 color center defects, which are represented by 741 nm absorption peaks in the UV-Vis spectra. However, the absorption lines caused by irradiation may disappear because of high temperature and high pressure treatment. Furthermore, not all the diamonds can cause the sharp absorption band of 1 450 cm-1 in the FFIR spectra after irradiation. As seen from the UV-Vis and FTIR spectra, the diamonds treated with the same process are specific as well in spectral characteristics. When the DiamondViewTM was employed to test the fluorescence pattern of the colored diamonds, it was found that, except for the typical fluorescence patterns of natural diamonds, the internal structural fringes of some diamonds were similar with the grown lines displayed by the CVD synthetic diamonds. Therefore, to determine whether the diamonds are natural or not, it is necessary to make further analysis with FTIR and UV-Vis absorption spectra as auxiliary means.

关 键 词：彩色钻石 天然钻石 辐照 退火处理 紫外-可见吸收光谱 

分 类 号：TS933.21[轻工技术与工程]