透射电镜辐照条件下VO_2(B)向VO_2(R)转化的原位研究  

In-situ TEM study of phase transition from VO_2(B) to VO_2(R) under the condition of irradiation

作　　者：高占明 江寒梅 张依福 孟长功 GAO Zhan-ming;JIANG Han-mei;ZHANG Yi-fu;MENG Chang-gong(Chemistry Analysis&Research Center,Faculty of Chemical,Environmental&Biological Science and Technology,Dalian University of Technology,Dalian Liaoning 116024;School of Chemistry,Faculty of Chemical,Environmental&Biological Science and Technology,Dalian University of Technology,Dalian Liaoning 116024,China)

机构地区：[1]大连理工大学化工与环境生命学部化学分析测试中心,辽宁大连116024 [2]大连理工大学化工与环境生命学部化学学院,辽宁大连116024

出　　处：《电子显微学报》2018年第2期116-120,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.21601026,21771030);中央高校基本科研业务费(No.DUT16LK37).

摘　　要：本文利用透射电镜(TEM)原位研究了VO_2(B)纳米带由B向R物相转变的过程。TEM像和选区电子衍射图(SAED)表明VO_2(B)纳米带结晶良好、无缺陷,为单斜相。对VO_2(B)纳米带选定区域进行电子束辐照,发现VO_2(B)转变为四方相VO_2(R)。对VO_2(B)和VO_2(R)的界面分析表明VO_2(B)的晶带轴为[11 2]B,VO_2(R)的晶带轴为[001]R;VO_2(B)与VO_2(R)两相取向关系为:[001]R//[11 2]B;(120)R//(110)B。In this paper,the transmission electron microscopy(TEM)was used to study the phase transition process of VO2(B)to VO2(R)in-situ.The TEM image and selected area electron diffraction(SAED)showed that VO2(B)nanobelt exhibited a good lattice structure without any crystal defects,as monoclinic phase.After electron beam irradiation to the selected area,VO2(B)converted to VO2(R)as tetragonal phase.The interface area between VO2(B)and VO2(R)was analyzed further.The results showed that the crystal axes of VO2(B)and VO2(R)are[112]B and[001]R separately.The orientation relationship between VO2(B)and VO2(R)is:[001]R//[11 2]B;(120)R//(110)B.

关 键 词：二氧化钒相态 原位 辐照 选区电子衍射 相变 

分 类 号：O614.51[理学—无机化学] O792[理学—化学]