Grain size effects in Bi4Ti3O12 nanocrystals investigated by Raman spectroscopy

被引：52
|
作者：
Du, YL
Chen, G
Zhang, MS
机构：
[1] Nanjing Univ Sci & Technol, Dept Mat Sci & Engn, Nanjing 210094, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2004年 / 132卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
bismuth titanate; crystal structure; phase transition; Raman spectroscopy;
D O I：
10.1016/j.ssc.2004.07.056
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The grain size effects in Bi4Ti3O12 nanocrystals were investigated by Raman spectroscopy. The Bi4Ti3O12 nanocrystals with grain size of 48 nm underwent an orthorhombic-to-monoclinic transition at low temperatures. The tetragonal structure of Bi4Ti3O12 nanocrystals with grain size of 23 nm gradually transformed to orthorhombic structure, and then to monoclinic structure with decreasing temperature. However, the tetragonal structure of Bi4Ti3O12 nanocrystals with grain size of 16 nm existed stably in the temperature range 298-77 K. These results showed that the crystal structure and phase transitions in Bi4Ti3O12 nanocrystals were strongly dependent on the grain size. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：175 / 179
页数：5
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