硼掺杂纳米金刚石的制备及表征（英文）  

Preparation and Characterization of Boron-Doped Nanodiamond

作　　者：严仙荣[1] 李晓杰[1,2] 王小红[1,2] 闫鸿浩[1,2] Yan Xianrong;Li Xiaojie;Wang Xiaohong;Yan Honghao(Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian 116024, China)

机构地区：[1]大连理工大学,辽宁大连116024 [2]工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《稀有金属材料与工程》2018年第12期3634-3639,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(10972051,11672067)

摘　　要：采用高温真空扩散法制备了硼掺杂纳米金刚石。采用热重分析仪、X射线光电子能谱仪、X射线衍射仪、傅里叶变换红外光谱仪、智能型拉曼光谱仪、透射电子显微电镜等技术手段对制备的产物进行表征。结果表明,产物主要包含C、O、B元素,其质量分数分别为92.08%,7.14%,0.78%。硼掺杂纳米金刚石的XRD图谱中除了金刚石(111)D、(220)D衍射峰外,还有六方金刚石(100)D的衍射峰。B原子的引入造成纳米金刚石的缺陷增多,引起G峰移至1620 cm^(-1)。硼原子在金刚石中以2种状态存在,分别是C-B碳的取代原子和B-O的间隙硼原子。掺杂后的纳米金刚石颗粒形状和形貌无明显变化(爆轰纳米金刚石的粒径2～10nm),有少部分立方金刚石的存在。总而言之,硼的掺杂使得纳米金刚石的初始氧化温度提高了175℃,氧化速度缓慢,热稳定性能提高。Boron-doped nanodiamond was prepared by a high-temperature vacuum-diffusion method.Thermogravimetric analysis, X-ray photoelectron spectroscopy,X-ray diffraction (XRD),Fourier-transform infrared spectroscopy,Raman spectroscopy,and transmission electron microscopy were used to characterize the prepared material.Results show that the product mainly contains C, O,and B in mass fractions of 92.08%,7.14%,and 0.78%,respectively.In addition to diamond (111)D and (220)D diffraction peaks, hexagonal diamond (100)D diffraction peaks are also observed in the XRD pattern of the boron-doped product.The introduction of B atoms increases the defect content in the nanodiamond and causes the Raman G peak to move to 1620cm^-1.B atoms are mainly present in two forms in the diamond lattice:substitutional carbon atoms in C-B bonds,and being bonded with impurity elements (such as B-O).The shape and morphology of the boron-doped nanodiamond particles (particle size of detonation nanodiamond, 2-10nm)exhibit no obvious changes compared to the pristine nanodiamond.However,a small amount of cubic diamond is observed.In conclusion,the initial oxidation temperature of the boron-doped nanodiamond increases by 175℃,the oxidation rate is slower,and the thermal stability is improved.

关 键 词：硼掺杂纳米金刚石 抗氧化性能 热稳定性 高温真空扩散法 

分 类 号：TQ163[化学工程—高温制品工业] TB383.1[一般工业技术—材料科学与工程]