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

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 °C or 1000 °C, respectively...

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Bibliographic Details
Published in:Journal of applied physics 2017-01, Vol.121 (1)
Main Authors: Guo, Jinjian, Zhu, Mankang, Li, Ling, Qing, Tianhe, Wang, Cong, Liu, Liying, Zheng, Mupeng, Hou, Yudong
Format: Article
Language:English
Subjects:
Annealing
Applied physics
Cations
Chemical synthesis
Domains
Ferroelectric materials
Ferroelectricity
Modulation
Perovskites
Relaxors
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Summary: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 °C or 1000 °C, respectively. It is found that the post-annealing at 800 °C switches KBT to a relaxor ferroelectric while the post-annealing at 1000 °C makes KBT develop into a normal ferroelectric. Besides, the sample annealed at 800 °C presented an inflection at 155 °C to decrease the P r due to the enhanced relaxor behavior. Moreover, annealing at 1000 °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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4973124