Investigation on relaxor-ferroelectric behavior of BNBT-KNN ceramics with Ta doping

Chenglong Zhang; Shurong Li; Suzhi Li; Le Zhang; Haijun Wu

doi:10.1142/S2010135X24400125

Journals >Journal of Advanced Dielectrics >Volume 14 >Issue 3 >Page 2440012 > Article

Journal of Advanced Dielectrics
Vol. 14, Issue 3, 2440012 (2024)

Investigation on relaxor-ferroelectric behavior of BNBT-KNN ceramics with Ta doping

Chenglong Zhang¹, Shurong Li¹, Suzhi Li¹, Le Zhang^2,*, and Haijun Wu^1,**

Author Affiliations

¹State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, 710049 Xi’an, China

²School of Physics, Xi’an Jiaotong University, 710049 Xi’an, China

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DOI: 10.1142/S2010135X24400125 Cite this Article

Chenglong Zhang, Shurong Li, Suzhi Li, Le Zhang, Haijun Wu. Investigation on relaxor-ferroelectric behavior of BNBT-KNN ceramics with Ta doping[J]. Journal of Advanced Dielectrics, 2024, 14(3): 2440012 Copy Citation Text

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Abstract

In this study, BNBT-KNN-xTa₂O₅ was designed and synthesized, successfully achieving a reduction in the relaxor-ferroelectric phase transition temperature. Synergy between temperature-dependent ferroelectric testing and dielectric spectroscopy confirmed that the depoling temperature gradually decreased with increasing doping concentration. Fitting of the relaxation parameter and freezing temperature substantiated that the incorporation of Ta₂O₅ increased the degree of relaxation in BNBT-KNN-xTa₂O₅, thereby effectively lowering the relaxor-ferroelectric phase transition temperature.

Keywords

BNT relaxor-ferroelectric behavior Ta₂O₅