物理学报2017，Vol.66Issue(2)：209-216,8.DOI:10.7498/aps.66.024601
极化状态与方向对单轴压缩下Pb(Zr0.95Ti0.05)O3铁电陶瓷畴变与相变行为的影响
Effects of poling state and direction on domain switching and phase transformation of Pb(Zr0.95Ti0.05)O3 ferroelectric ceramics under uniaxial compression
摘要
Abstract
The digital image correlation technique is used for full field measurements of axial strain and transverse strain of PZT95/5 ferroelectric ceramics under uniaxial compression.Based on the variations of the axial strain and transverse strain with axial stress,the effects of poling state and poling direction of PZT95/5 ferroelectric ceramics on the domain switching and phase transformation behaviors are explored.Domain switching occurs in unpoled and Z-axis poled PZT95/5 ferroelectric ceramics separately,while domain switching in the Y-axis poled PZT95/5 ferroelectric ceramic is not observed.Domain switching strain in the Z-axis poled PZT95/5 ferroelectric ceramic has obvious influences on the developments of axial strain and transverse strain,but the influence of domain switching strain in the unpoled PZT95/5 ferroelectric ceramic is very weak,which can be attributed to the different random distribution characteristics of domain orientation.By the strain decomposition analysis,it is proved that the domain switching and the phase transition process can be decoupled,and domain switching strain and phase transformation strain can be distinguished successfully.Compared with the Z-axis poled PZT95/5 ferroelectric ceramic,the unpoled PZT95/5 ferroelectric ceramic has a small critical stress of phase transformation,while the critical stress of the Y-axis poled PZT95/5 ferroelectric ceramics is big,which may be concluded that the domain switching behavior favors the phase transformation process.The polarization released behavior of PZT95/5 ferroelectric ceramic also depends on the poling direction.The depolarization mechanism of Z-axis poled PZT95/5 ferroelectric ceramic is caused by both domain switching and phase transformation,and the Y-axis poled PZT95/5 ferroelectric ceramic is caused by only phase transformation.关键词
PZT95/5铁电陶瓷/畴变/相变/极化状态与方向Key words
PZT95/5 ferroelectric ceramics/domain switching/phase transformation/poling state and direction引用本文复制引用
蒋招绣,王永刚,聂恒昌,刘雨生..极化状态与方向对单轴压缩下Pb(Zr0.95Ti0.05)O3铁电陶瓷畴变与相变行为的影响[J].物理学报,2017,66(2):209-216,8.基金项目
国家自然科学基金(批准号:11272164,11472142)、宁波大学王宽诚幸福基金和王宽诚教育基金资助的课题.Project supported by the National Natural Science Foundation of China (Grant Nos.11272164,11472142),the K.C.Wong Magna Foundation,and K.C.Wong Education Foundation of Ningbo University,China. （批准号:11272164,11472142）
