Giant strain response and structure evolution in (Bi0.5Na0.5)0.945−x(Bi0.2Sr0.7□0.1)xBa0.055TiO3 ceramics
作者： Jing Shi , Huiqing Fan , Xiao Liu , Qiang Li
DOI: 10.1016/J.JEURCERAMSOC.2014.05.032
关键词: Monoclinic crystal system 、 Materials science 、 Ceramic 、 Mineralogy 、 Phase transition 、 Condensed matter physics 、 Coercivity 、 Microstructure 、 Electroceramics 、 Transition temperature 、 Ferroelectricity
摘要: The microstructure, electric-field-induced strain, polarization, and dielectric permittivity in (Bi0.5Na0.5)0.945−x(Bi0.2Sr0.70.1)xBa0.055TiO3 (BNBT–xBST) (0 ≤ x 0.08) electroceramics are investigated. An irreversible transition from rhombohedral monoclinic coexistence phase to single is indicated with the remnant strain Sr = 0.330% at 0. As BST content increases, ferroelectric order disrupted resulting a degradation of coercive field, ferroelectric-to-relaxor temperature (TF–R). relaxor observed for optimum composition 0.02 ambient large 0.428% 60 kV/cm (normalized Smax/Emax 713 pm/V). contributed by both domain reorientation behavior reversible transition. © 2014 Elsevier Ltd. All rights reserved.
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