钾钨青铜材料中的W空位有序  

Ordered W vacancies in potassium tungsten bronze

作　　者：吕英豪 李露颖[2] 刘辉辉 蒋仁辉 赵培丽 王凯 赵立功 魏彦杰 贾双凤 郑赫 王建波 Lü Ying-hao;LI Lu-ying;LIU Hui-hui;JIANG Ren-hui;ZHAO Pei-li;WANG Kai;ZHAO Li-gong;WEI Yan-jie;JIA Shuang-feng;ZHENG He;WANG Jian-bo(School of Physics and Technology,Center for Electron Microscopy,MOE Key Laboratory of Artificial Micro-and Nano-structures,and Institute for Advanced Studies,Wuhan University,Wuhan Hubei 430072;Center for Nanoscale Characterization and Devices,Wuhan National Laboratory for Optoelectronics School of Physics,Huazhong University of Science and Technology,Wuhan Hubei 430074;Science and Technology on High Strength Structural Materials Laboratory,Central South University,Changsha Hunan 410083,China)

机构地区：[1]武汉大学物理科学与技术学院,电子显微镜中心,人工微结构教育部重点实验室和高等研究院,湖北武汉430072 [2]华中科技大学,光电国家实验室,纳米材料与器件中心,湖北武汉430074 [3]中南大学轻质高强结构材料重点实验室,湖南长沙410083

出　　处：《电子显微学报》2018年第6期571-577,共7页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.51671148,51271134,J1210061,11674251,51501132,51601132);湖北省自然科学基金资助项目(Nos.2016CFB446,2016CFB155);中央高校基本科研业务费专项基金;高等学校仪器设备和优质资源共享系统(No.CERS-1-26);中国博士后科学基金资助项目(No.2014T70734);中南大学轻质高强结构材料国家级重点实验室开放研究基金;苏州科技项目(No.SYG201619)。

摘　　要：本实验利用简单的加热方法合成具有通道结构六角钨青铜K_xWO_3,同时对其中存在的超结构进行原子尺度的扫描透射电子显微术分析。实验结果表明,六角钨青铜K_xWO_3中存在的超结构归因于单原子层内存在的W空位有序现象。同时发现,在电子束辐照的作用下,原子层内存在的W空位有序现象消失。该实验结果深化了对六角钨青铜K_xWO_3中存在的超结构的认识,从而为设计优异性能的钨青铜材料提供借鉴。The hexagonal potassium tungsten bronze K x WO 3 with tunnel structure was synthesized by a simple heating method in this work.The atomic-scale information of superstructures was acquired by scanning transmission electron microscopy.The experimental results indicate that the superstructures in the hexagonal K x WO 3 are attributed to the ordered W vacancies in single atomic layer.Meanwhile,the ordered W vacancies disappear under the e-beam irradiation.This work facilitates further understanding of the superstructures in the hexagonal K x WO 3 and paves way for designing potassium tungsten bronze materials with better performance.

关 键 词：钾钨青铜 扫描透射电子显微术 超结构 

分 类 号：O614.121[理学—无机化学] TG115.215.3[理学—化学]