Ferroelectric, elastic, piezoelectric, and dielectric properties of Ba(Ti0.7Zr0.3) O3-x( Ba0.82Ca0.18) TiO3 Pb-free ceramics

被引:18
作者
Yuan, Ruihao [1 ]
Xue, Deqing [1 ]
Zhou, Yumei [1 ]
Ding, Xiangdong [1 ]
Sun, Jun [1 ]
Xue, Dezhen [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
PHASE-BOUNDARY; LEAD; BEHAVIOR; STRAIN;
D O I
10.1063/1.4996353
中图分类号
O59 [应用物理学];
学科分类号
摘要
We designed and synthesized a pseudo-binary Pb-free system, Ba(Ti0.7Zr0.3) O3-x(Ba0.82Ca0.18) TiO3, by combining a rhombohedral end (with only cubic to rhombohedral ferroelectric phase transition) and a tetragonal end (with only cubic to tetragonal ferroelectric phase transition). The established composition-temperature phase diagram is characterized by a tricritical point type morphotropic phase boundary (MPB), and the MPB composition has better ferroelectric, piezoelectric, and dielectric properties than the compositions deviating from MPB. Moreover, a full set of material constants (including elastic stiffness constants, elastic compliance constants, piezoelectric constants, dielectric constants, and electromechanical coupling factors) of the MPB composition are determined using a resonance method. The good piezoelectric performance of the MPB composition can be ascribed to the high dielectric constants, elastic softening, and large electromechanical coupling factor. Published by AIP Publishing.
引用
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页数:7
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