Adaptive ferroelectric state at morphotropic phase boundary: Coexisting tetragonal and rhombohedral phases

Zhang, Yang1; Xue, Dezhen1; Wu, Haijun1,2; Ding, Xiangdong1; Lookman, Turab3,4; Ren, Xiaobing1,5

2014-06

10.1016/j.actamat.2014.03.007

ACTA MATERIALIA   影响因子和分区

1359-6454

1873-2453

With a focus on local symmetry, the microstructural basis for high piezoelectric performance in PbMg1/3Nb2/3O3-xPbTiO3 (PMN-PT) ceramics at the morphotropic phase boundary (MPB) composition was investigated by means of convergent-beam electron diffraction analysis and twin diffraction pattern analysis. The local structure was found to consist of coexisting (101)-type tetragonal nanotwins and (001)-type rhombohedral nanotwins. A phenomenological theory based on crystallography is proposed to show that such nanoscale coexistence can give rise to an average monoclinic structure through strain accommodation. The average monoclinic structures (Ma and Mc) vary with temperature and composition due to the dependence on temperature and composition of the lattice parameters. Based on in situ X-ray diffraction data, we demonstrate how the polarization rotates across the MPB region in PMN PT ceramics with varying temperatures and compositions. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Piezoelectrics Morphotropic phase boundary TEM Twin boundary Adaptive phase

SCI ; EI

英语

其他

111 project of China[B06025]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000336695100018

PERGAMON-ELSEVIER SCIENCE LTD

20141517563312

Ceramic materials ; Electron diffraction ; Phase boundaries ; Transmission electron microscopy ; X ray crystallography

Physical Chemistry:801.4 ; Ceramics:812.1 ; Crystal Lattice:933.1.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Frontier Inst Sci & Technol, Multidisciplinary Mat Res Ctr, Xian 710049, Peoples R China
2.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China
3.Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
4.Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA
5.Natl Inst Mat Sci, Ferro Phys Grp, Tsukuba, Ibaraki 3050047, Japan

Zhang, Yang,Xue, Dezhen,Wu, Haijun,et al. Adaptive ferroelectric state at morphotropic phase boundary: Coexisting tetragonal and rhombohedral phases[J]. ACTA MATERIALIA,2014,71:176-184.

Zhang, Yang,Xue, Dezhen,Wu, Haijun,Ding, Xiangdong,Lookman, Turab,&Ren, Xiaobing.(2014).Adaptive ferroelectric state at morphotropic phase boundary: Coexisting tetragonal and rhombohedral phases.ACTA MATERIALIA,71,176-184.

Zhang, Yang,et al."Adaptive ferroelectric state at morphotropic phase boundary: Coexisting tetragonal and rhombohedral phases".ACTA MATERIALIA 71(2014):176-184.