摘要
红宝石的热处理属于优化处理,常用硼砂作助熔剂。在市场中热处理红宝石被以天然红宝石出售,价值颇高,但裂隙中硼砂的含量多少会影响到售价的高低。因此,对此类红宝石中的硼砂进行定量研究,应用NanoVoxel-4000X型射线计算机断层扫描仪对样品进行扫描分析,从而获得裂隙中充填物硼砂的2D图像。用明暗灰度值表征裂隙中不同密度的物质;充填物硼砂分布的3D图像中用不同的颜色表征其三维厚度。通过比较表征厚度的色标,可直观看到硼砂的整体含量小。同时样品的硼砂的厚度分布直方图显示所有裂隙内硼砂的厚度都小于130μm,所有硼砂的厚度和体积比都小于10%,也说明填充量小。最后通过Avizo 9.0软件对红宝石样品和硼砂的含量进行阈值分割,得到两者的实际体积,然后可计算出硼砂含量的体积占红宝石总体积的百分比。本实验样品中充填物硼砂体积比例为10.69%,这既是热处理红宝石中硼砂定量检测中的一个重要指标,也为研究热处理红宝石中硼砂的定量分级标准提供了数据支撑。
The heat treatment of ruby belongs to the optimization treatment,and borax is commonly used as the flux.In the market,heat-treated rubies are sold naturally and have a high value,but the amount of borax in the crack will affect the price.Therefore,in this paper,the borax in this kind of ruby was quantitatively studied,and NanoVoxel-4000X X-ray computed tomography was used to scan and analyze the sample,and 2D images of borax filling in fractures were obtained.The grayscale values of light and shade were used to characterize the different densities of the material in the crack,and different colors characterized the 3D images of the borax filling distribution.By comparing the color scale of thickness,it can be seen that the overall content of borax is small.At the same time,the histogram of the borax thickness distribution of samples shows that the thickness of borax in all fractures is less than 130μm,and the thickness-to-volume ratio of all borax is less than 10%,which also indicates that the filling amount is small.Finally,Avizo 9.0 software was used to segment the ruby sample and borax content to obtain the actual volume of the two.Then,the percentage of borax content in the total volume of the ruby could be calculated.The proportion of borax in the sample is 10.69%,which is not only an important index in the quantitative detection of borax in heat-treated rubies but also provides data support for the study of the quantitative classification standard of borax in heat-treated rubies.
作者
向子涵
尹作为
张志清
王文薇
XIANG Zi-han;YIN Zuo-wei;ZHANG Zhi-qing;WANG Wen-wei(Hubei Land Resources Vocational College,Wuhan 430090,China;Gemmological Institute,China University of Geosciences(Wuhan),Wuhan 430074,China;Jewelry School,West Yunnan University of Applied Sciences,Tengchong 679100,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2024年第7期2024-2028,共5页
Spectroscopy and Spectral Analysis
基金
湖北省地质局2023年度科技项目(KJ2023-51)
国家自然科学基金重点项目(41973032)
湖北省珠宝首饰工程技术研究中心科研项目(CIGTXM-03-202001)资助。
关键词
热处理红宝石
硼砂含量
定量分析
Heat treated ruby
Borax content
Quantitative analysis
