Normal- relaxor ferroelectric modulation of a-site complex perovskite ferroelectric (K1/2Bi1/2)TiO3 by post-annealing

作者：Guo, Jinjian; Zhu, Mankang^*; Li, Ling; Qing, Tianhe; Wang, Cong; Liu, Liying; Zheng, Mupeng; Hou, Yudong

来源：Journal of Applied Physics, 2017, 121(1): 014101.

DOI：10.1063/1.4973124

• PHASE-TRANSITION
• PIEZOELECTRIC PROPERTIES
• K0.5BI0.5TIO3 FERROELECTRICS
• ELECTRICAL-PROPERTIES
• DIELECTRIC-PROPERTIES
• RAMAN-SPECTROSCOPY
• TITANATE CERAMICS
• THIN-FILMS
• CRYSTALS

In this work, the A-site complex perovskite K1/2Bi1/2TiO3 (KBT) was first found to demonstrate a normal-relaxor ferroelectric modulation by the annealing temperature. KBT ceramics were synthesized by the solid-state reaction method and subjected to a post-annealing at 800 degrees C or 1000 degrees C, respectively. It is found that the post-annealing at 800 degrees C switches KBT to a relaxor ferroelectric while the post-annealing at 1000 degrees C makes KBT develop into a normal ferroelectric. Besides, the sample annealed at 800 degrees C presented an inflection at 155 degrees C to decrease the Pr due to the enhanced relaxor behavior. Moreover, annealing at 1000 degrees C could promote the growth of the domains and the local ordering of A-site cations. It is believed that the modulation of KBT between the normal ferroelectric and relaxor was attributed to the domain size and the local ordering of A-site cations. Published by AIP Publishing.

• 出版日期2017-1-7
• 单位北京工业大学