Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 6, Pages 7430-7437Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.11.083
Keywords
(Pb, Ba)ZrO3; Antiferroelectric; Phase boundary; Ferroelectric relaxor; Phase diagram
Categories
Funding
- Anhui Provincial Natural Science Foundation [2008085QE205, 2008085MF206]
- Open Project Program of Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University [EFMD2020004Z]
- National Natural Science Foundation of China [51872001, 61975224]
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In this study, relationships between phase structure, dielectric, and ferroelectric performances in the (Pb, Ba)ZrO3 system were meticulously explored to clarify its complex characteristics. The observed ferroelectric behaviors were found to be substantially influenced by domain switching, and a phase diagram was constructed to guide compositional design in this system.
In this work, we elaborately explored relationships between phase structure, dielectric and ferroelectric performances in (Pb, Ba)ZrO3 system to clarify its confusing characteristics. 1) Incorporation of barium decreased phase transition temperature, and orthorhombic-orthorhombic + rhombohedral-pseudocubic phase transition sequence was determined for fresh sample and more complicated transitions for poled ones. 2) Macroscopically, antiferroelectric-ferroelectric + antiferroelectric-ferroelectric relaxor -Debye medium states at room tempera ture were deduced, evidenced by multi-dimensional analysis. 3) The observed ferroelectric behaviors were substantially originated from synergistic ferroelectric + antiferroelectric domain switching for x = 0.90-0.75 compositions, which were innovatively justified by single-bipolar-cycle measurements. 4) Antiferroelectric + ferroelectric <-> ferroelectric <-> relaxor phase boundaries were built in (PbxBa1-x)ZrO3, where polarization and strain value reached to maxima at corresponding x = 0.75 and 0.65 compositions. Finally, phase diagram in (PbxBa1-x)ZrO3 binary system (0.5 <= x <= 1.0) was constructed and refined, thus provided a guideline for compositional design in this system.
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