广西伊岭岩岩石（CaCO3）晶体结构、德拜温度以及硬度研究  

Study on Crystal Structure,Debye Temperature and Hardness of the Yilingyan Rock（CaCO3） in Guangxi

作　　者：黄金辉 杨通晗 黄国任 吴晓维 何维 HUANG Jinhui;YANG Tonghan;HUANG Guoren;WU Xiaowei;HE Wei(School of Resources,Environment and Materials,Guangxi University,Nanning,Guangxi,530004,China)

机构地区：[1]广西大学资源环境与材料学院

出　　处：《广西科学》2019年第4期370-377,共8页Guangxi Sciences

基　　金：国家自然科学基金项目(51861003)资助

摘　　要：本文从微观角度研究碳酸钙矿石的晶体结构与物理性能,为碳酸钙矿石的应用提供理论依据。利用X射线衍射(XRD)技术分析广西伊岭岩岩石2个样品(A1、A2)的相组成及其晶体结构,并利用带能谱仪的电子显微镜(SEM/EDS)测试这2个样品的各相成分。结果表明:广西伊岭岩岩石的主要成分为CaCO3,其中A1样品含有少量的K^+,A2样品含有少量Na^+。通过Rietveld全谱图拟合晶体结构精修可知,K+替代样品A1主要物相CaCO3中的Ca^2+,使其点阵参数变大,单胞体积变大。同样A2样品中的Na^+替代了样品中CaCO3的Ca^2+位置,造成A2中的CaCO3点阵参数变小,单胞体积变小。德拜温度近似模型计算出2个样品的德拜温度分别为318.86 K、324.82 K。维氏硬度测试法测试出2个样品的硬度大小分别为132.6 HV、148.9 HV。The crystal structure and physical properties of calcium carbonate ore was studied from a microscopic perspective to provide a theoretical basis for the application of calcium carbonate ore.The phase components of the two samples(A1,A2)were tested by electron microscopy with an energy spectrometer(SEM/EDS).The phase composition and crystal structure of two samples from the Yilingyan rock in Guangxi Province were analyzed by X-ray diffraction(XRD).The results show that the main phase component of the Yilingyan rock is CaCO3,and the A1 sample contains a small amount of K^+,A2 sample contains a small amount of Na+.Through the Rietveld crystal structure refinement,it is known that the K^+replaces the Ca^2+in the main phase CaCO3 of the sample A1,the lattice parameter and the unit cell volume become larger.Similarly,the Na+replaces the Ca^2+in the main phase CaCO3 of the sample A2,the lattice parameter and unit cell volume become smaller.The Debye temperature of the two samples calculated by the Debye temperature approximation model is 318.86 K and 324.82 K,respectively.The hardness of the two samples tested by the Vickers hardness test is 132.6 HV and 148.9 HV,respectively.

关 键 词：伊岭岩 X射线衍射 晶体结构 德拜温度 

分 类 号：TN41[电子电信—微电子学与固体电子学]