Giant electrostrictive effects of NaNbO3-BaTiO3 lead-free relaxor ferroelectrics

被引：109

作者：

Zuo, Ruzhong ^{[1
]}

Qi, He ^{[1
]}

Fu, Jian ^{[1
]}

Li, Jingfeng ^{[2
]}

Shi, Min ^{[1
]}

Xu, Yudong ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Inst Electro Ceram & Devices, Hefei 230009, Peoples R China

[2] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 23期

基金：

中国国家自然科学基金;

关键词：

TERNARY-SYSTEM; PEROVSKITES;

D O I：

10.1063/1.4953457

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A giant electrostrictive effect was observed in (1 - x)NaNbO3-xBaTiO(3) relaxor ferroelectric ceramics, which exhibit a high electrostrictive coefficient Q(33) of similar to 0.046 m(4)/C-2 twice as large as those of Pb- and Bi-based perovskite relaxor ferroelectric ceramics. The theoretical analysis suggests that Q(33) should be strongly correlated with chemical species of cations in a perovskite structure in which a strong ionic bond is of great benefit compared with a covalent bond. A hysteresis-free large electrostrictive strain of similar to 0.148% up to at least 70 Hz was obtained in the x = 0.25 sample, demonstrating significant advantages over piezoelectric effects in high-precision ceramic actuators. Published by AIP Publishing.

引用

页数：5

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