Low electric-field driven ultrahigh electrostrains in Sb-substituted (Na,K)NbO3 lead-free ferroelectric ceramics

被引：47

作者：

Fu, Jian ^{[1
]}

Zuo, Ruzhong ^{[1
]}

Qi, He ^{[1
]}

Zhang, Chen ^{[1
]}

Li, Jingfeng ^{[2
]}

Li, Longtu ^{[2
]}

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 | 2014年 / 105卷 / 24期

基金：

中国国家自然科学基金;

关键词：

PHASE-TRANSITION; PIEZOELECTRIC PROPERTIES; STRAINS;

D O I：

10.1063/1.4904476

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Lead-free (Na0.52K0.48)(Nb1-ySby)O-3 (NKNSy) ferroelectric ceramics were reported to exhibit an ultrahigh electrostrain (dynamic d(33)* (=S/E) of 800-1100 pm/V) in a relatively low driving electric field range (1-4 kV/mm). As evidenced by in-situ synchrotron x-ray diffraction and dielectric measurements, the mechanism of generating large strains was ascribed to both the low-field induced reversible rhombohedral-monoclinic phase transition (1-2 kV/mm) and the enhanced domain switching (2-4 kV/mm) owing to the normal to relaxor phase transformation, which contribute to similar to 62% and similar to 38% of the total strain, respectively. The results indicate that the NKNSy compositions would have excellent potentials for applications of lead-free actuator ceramics. (C) 2014 AIP Publishing LLC.

引用

页数：4

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