几种软玉材料的拉曼光谱特性研究
时间:2020-12-06 20:48 来源:毕业论文 作者:毕业论文 点击:次
摘要 玉石分为软玉和翡翠,玉石精美,温润坚韧,自古便深受人们喜爱。玉石的鉴定方法有多种,传统方法大多看其质地、透明度、呈色,但只能定性的描述,并且误差较大,而拉曼光谱学具有无损探测,测量时间短,无需样品准备的优点,能定量分析玉石成分,辨别真伪。为了确定玉石真伪以及处理手段,本文用拉曼光谱仪测量了两块软玉、两块翡翠和一块蛋白石的拉曼光谱,进行了成分分析,并对比了三者的光谱,发现软玉翡翠经过了不同程度的染色处理, 软玉的皮经过加热处理以及蛋白石经过有机物填充,最后总结了拉曼光谱学鉴定玉石的优缺点。60444 毕业论文关键词 玉石,软玉,翡翠,拉曼光谱 Title The Study of Raman spectroscopy of several nephrite material Abstract Jade, composed of Nephrite and Jadeite, is elegant and moist tough and popular among people since ancient times. There are a variety of identification methods , for example, most traditional methods identify jade by seeing its texture, transparency, coloration and so on, but only qualitative description with many deviation. Instead, Raman spectroscopy has the advantages of nondestructive and requiring short measurement times, and no sample preparation and it can distinguish real and fake by quantitatively analyzing Jade ingredients with. In order to determine the authenticity of jade and processing means, in this paper, we measured the Raman spectra of two nephrite and two jadeite and an opal by Raman spectroscopy, conducted a composition analysis and compared their spectra and found that the nephrite and jadeite have been dyed different degrees, nephrite skin after heat treatment and opal filled with organics, and eventually summarized the advantages and disadvantages of Raman spectroscopy applied in identification of jade. Keywords Jade, Nephrite, Jadeite, Raman Spectroscopy 目录 1 绪论 .. 1 2 研究背景 1 2.1 软玉 . 2 2.1.1软玉介绍 . 2 2.1.2软玉研究现状 .. 2 2.1.2软玉研究存在的问题 .. 3 2.2 硬玉(翡翠) 3 2.1.1翡翠介绍 . 3 2.1.1翡翠研究现状 .. 4 2.1.1翡翠研究存在的问题 .. 4 2.3 本章小结 .. 5 3 理论基础 5 3.1 拉曼光谱 .. 5 3.1.1基本原理 . 6 3.1.2拉曼光谱的特点 . 7 3.2 实验仪器 .. 7 3.2.1拉曼光谱分析技术 7 3.2.2 LRS—3 激光拉曼/荧光光谱仪 7 3.2.3激光拉曼光谱仪的原理 . 8 3.2.4外光路系统 9 3.3 本章小结 10 4 实验内容 . 10 4.1 题外实验仪器 . 10 4.2 几种玉石的拉曼光谱测量分析 10 4.2.1拉曼光谱分析技术 . 10 4.2.2 对翡翠拉曼光谱的分析 . 15 4.2.3软玉的拉曼光谱 .. 15 4.2.4对软玉拉曼光谱的分析 .. 24 4.3本章小结 .. 26 结论 27 致谢 28
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