Finite-size-effect on a very large length scale in NBT-based lead-free piezoelectrics

被引：8
|
作者：
Mishra, Anupam [1 ]
Khatua, Dipak Kumar [1 ]
Adhikary, Gobinda Das [1 ]
Kumar, Naveen [1 ]
Shankar, Uma [1 ]
Ranjan, Rajeev [1 ]
机构：
[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2019年 / 9卷 / 05期
关键词：
Lead-free piezoelectrics; Na0.5Bi0.5TiO3; size effect; crystal structure; depolarization temperature; PHASE-TRANSITIONS; STRUCTURAL MECHANISM; FERROELECTRICS; DEPENDENCE;
D O I：
10.1142/S2010135X19500358
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Na0.5Bi0.5TiO3-based lead-free piezoelectrics are considered for potential replacement of the lead-based commercial piezoceramics in high-power transducer applications. We have examined the role of grain size in influencing the structural-polar inhomogeneity of stoichiometric and off-stoichiometric Na0.5Bi0.5TiO3 (NBT), and its morphotropic-phase-boundary (MPB) derivative 0.94Na(0.5)Bi(0.5)TiO(3)-0.06BaTiO(3) (NBT-6BT). Our study reveals that size effect comes into play in these systems on a very large length scale (on the scale of microns) considerably affecting its global structure and properties.
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页数：7
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