不同方法合成蓝宝石与天然蓝宝石的谱学对比研究  

Comparative Study on Spectroscopic Characteristics of Natural Sapphire and Synthetic Sapphire by Different Methods

作　　者：曹稳政 何珊珊 腾亚君 祖恩东[1] CAO Wenzheng;He Shanshan;Teng Yajun;ZU Endong(Faculty of Material Science Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Customs Technology Center,Kunming 650228,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明海关技术中心,云南昆明650228

出　　处：《光散射学报》2022年第4期290-295,共6页The Journal of Light Scattering

基　　金：国家重点研发计划(2018YFF0215400)。

摘　　要：蓝宝石作为珍贵的彩色宝石深受人们喜爱,随着宝石合成技术的不断发展,市面上已有许多种合成方法制成的合成蓝宝石,常规的宝石学鉴定不能简单准确的区分天然蓝宝石与不同合成方法的合成蓝宝石。论文利用紫外-可见-近红外光谱仪对蓝宝石进行光谱分析,发现天然蓝宝石具有387 nm、452 nm、566 nm吸收峰,而提拉法、焰熔法和泡生法合成蓝宝石则无这些吸收峰;提拉法和焰熔法合成蓝宝石都具有600 nm附近的吸收带;泡生法合成蓝宝石存在660 nm附近的吸收峰,其他三种蓝宝石无此吸收峰。通过拉曼光谱特征峰拟合分析与SPSS单因素方差分析,发现天然蓝宝石和不同方法合成蓝宝石的半高宽值存在显著差异,天然蓝宝石的半高宽值大于10.0 cm^(-1),三种合成蓝宝石的半高宽值小于10.0 cm^(-1);泡生法合成蓝宝石半高宽集中在8 cm^(-1)附近,而焰熔法合成蓝宝石的半高宽普遍在8 cm^(-1)~10cm^(-1)范围内,提拉法合成蓝宝石半高宽则分布在6 cm^(-1)~8 cm^(-1)范围内。对比研究紫外-可见-近红外光谱与拉曼光谱的显著谱图特征差异,可简单、有效、无损的区分鉴定天然蓝宝石与不同合成方法合成的蓝宝石。Sapphire are beloved as precious colored gemstones,With the continuous development of gemstone synthesis technology,there are many synthetic sapphire made by different synthetic methods on the market.Conventional gemological identification cannot simply and accurately distinguish natural sapphire from synthetic sapphire made by different synthetic methods.The thesis uses UV-Vis-NIR spectrometer to perform spectral analysis on sapphire.It is found that natural sapphire has The absorption peaks at 387 nm,452 nm and 566 nm are absent from the synthetic sapphire synthesized by Czochralski method,flame melting method and Paulson method.Both Czochralski and flame melting sapphire have an absorption band around 600 nm;the Paulson sapphire has an absorption peak around 660 nm,and the other three types of sapphire have no such absorption peak.According to characteristic peak fitting analysis by Raman spectrum and spss one-way ANOVA analysis,it is found that there are significant differences in the full width at half maximum between natural sapphire and synthetic sapphire,the full width at half maximum of natural sapphire are greater than 10.0 cm^(-1),and the full width at half maximum of three synthetic sapphires are less than 10.0 cm^(-1).The full width at half maximum of the sapphire synthesized by the Paulson method is concentrated around 8 cm^(-1),while the half width of the sapphire synthesized by the flame melting method is generally 8 cm^(-1)~10 cm^(-1),and the half width of the sapphire synthesized by the Czochralski method is distributed in 6 cm^(-1)~8cm^(-1)range.By comparing and studying the significant differences in spectral characteristics of UV-Vis-NIR spectra and Raman spectra,it can be use to distinguish and identify between natural sapphire and sapphire synthesized by different methods in a simple,effective and non-destructive manner.

关 键 词：光谱学 蓝宝石 合成蓝宝石 紫外-可见-近红外光谱 拉曼光谱 SPSS分析 

分 类 号：P575.4[天文地球—矿物学]