摘要
目前学界对β-Ag2S快离子导体中Ag原子占位仍未认识清楚,而这一问题对理解β-Ag2S的导电机理等特性具有重要意义。本文首次报道了基于球差校正扫描透射电镜(STEM)的β-Ag2S快离子导体中Ag原子占位表征。沿[100]β、[110]β、[210]β和[111]β方向的原子级分辨率高角环形暗场(HAADF)像与QSTEM软件高分辨模拟图像对比结果表明Ag原子在6(b)、12(d)和24(h)三类间隙均有分布。原位加热实验结果表明,当温度上升到300℃时Ag原子占位并未发生明显变化。本文为理解β-Ag2S的结构提供了直接的重要信息。
The site occupation of Ag atom in β-Ag2S, which is of great importance for understanding the electrical conduction mechanism and other characteristics of β-Ag2S, has still not been fully solved. In this paper, the site occupation of Ag atom in β-Ag2S was characterized for the first time using spherical aberration( C s )-corrected STEM. The atomic-resolution high-angle annular dark field(HAADF)images along [100]β,[1 10]β,[210]β and [111 ]β zone axes and the simulated HAADF images indicate that Ag atoms occupied 6( b ), 12( d ) and 24( h ) interstices of S framework. In situ heating experiment results show that the site occupation of Ag atoms kept unchanged even when heated to 300 ℃. This work provides new critical information for thoroughly understanding the structure β-Ag2S.
作者
刘军
陈陆
王勇
张泽
LIU Jun;CHEN Lu;WANG Yong;ZHANG Ze(Center of Electron Microscopy and State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou Zhejiang 310027,China)
出处
《电子显微学报》
CAS
CSCD
北大核心
2019年第3期209-214,共6页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(Nos.51390474,11327901)
