Understanding the depolarization temperature in (Bi0.5Na0.5)TiO3-based ferroelectrics

Zhongming Fan; Sevag Momjian; Clive A. Randall

doi:10.1016/j.jeurceramsoc.2023.03.013

Understanding the depolarization temperature in (Bi_0.5Na_0.5)TiO₃-based ferroelectrics

Zhongming Fan
, Sevag Momjian
, Clive A. Randall

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Depolarization temperature, or T_d, in ferroelectric materials limits the high temperature operation regime as the long range dipolar ordering could not be maintained beyond T_d during zero field heating. Therefore, the control of T_d has been always drawing the attention of the ferroelectric/piezoelectric community. Some particular issues include: Which point defect is more responsible for the change of T_d? What is the phase equilibrium as a function of T_d? In this paper, our goal is to elaborate the correlation between T_d and defect chemistry in 85% (Bi_0.5Na_0.5)TiO₃-15% BaTiO₃ (BNT-15BT) ferroelectric ceramics. Various experimental tools are employed and cross referenced, including dielectric measurements, thermal stimulated depolarization current, impedance spectroscopy, scanning transmission electron microscopy and in-situ transmission electron microscopy. Collectively this study generates a more insightful understanding of T_d in BNT-based ferroelectrics.

Original language	English (US)
Pages (from-to)	4021-4028
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	9
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2023.03.013
State	Published - Aug 2023

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2023.03.013

Cite this

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title = "Understanding the depolarization temperature in (Bi0.5Na0.5)TiO3-based ferroelectrics",

abstract = "Depolarization temperature, or Td, in ferroelectric materials limits the high temperature operation regime as the long range dipolar ordering could not be maintained beyond Td during zero field heating. Therefore, the control of Td has been always drawing the attention of the ferroelectric/piezoelectric community. Some particular issues include: Which point defect is more responsible for the change of Td? What is the phase equilibrium as a function of Td? In this paper, our goal is to elaborate the correlation between Td and defect chemistry in 85\% (Bi0.5Na0.5)TiO3-15\% BaTiO3 (BNT-15BT) ferroelectric ceramics. Various experimental tools are employed and cross referenced, including dielectric measurements, thermal stimulated depolarization current, impedance spectroscopy, scanning transmission electron microscopy and in-situ transmission electron microscopy. Collectively this study generates a more insightful understanding of Td in BNT-based ferroelectrics.",

author = "Zhongming Fan and Sevag Momjian and Randall, \{Clive A.\}",

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journal = "Journal of the European Ceramic Society",

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T1 - Understanding the depolarization temperature in (Bi0.5Na0.5)TiO3-based ferroelectrics

AU - Fan, Zhongming

AU - Momjian, Sevag

AU - Randall, Clive A.

PY - 2023/8

Y1 - 2023/8

N2 - Depolarization temperature, or Td, in ferroelectric materials limits the high temperature operation regime as the long range dipolar ordering could not be maintained beyond Td during zero field heating. Therefore, the control of Td has been always drawing the attention of the ferroelectric/piezoelectric community. Some particular issues include: Which point defect is more responsible for the change of Td? What is the phase equilibrium as a function of Td? In this paper, our goal is to elaborate the correlation between Td and defect chemistry in 85% (Bi0.5Na0.5)TiO3-15% BaTiO3 (BNT-15BT) ferroelectric ceramics. Various experimental tools are employed and cross referenced, including dielectric measurements, thermal stimulated depolarization current, impedance spectroscopy, scanning transmission electron microscopy and in-situ transmission electron microscopy. Collectively this study generates a more insightful understanding of Td in BNT-based ferroelectrics.

AB - Depolarization temperature, or Td, in ferroelectric materials limits the high temperature operation regime as the long range dipolar ordering could not be maintained beyond Td during zero field heating. Therefore, the control of Td has been always drawing the attention of the ferroelectric/piezoelectric community. Some particular issues include: Which point defect is more responsible for the change of Td? What is the phase equilibrium as a function of Td? In this paper, our goal is to elaborate the correlation between Td and defect chemistry in 85% (Bi0.5Na0.5)TiO3-15% BaTiO3 (BNT-15BT) ferroelectric ceramics. Various experimental tools are employed and cross referenced, including dielectric measurements, thermal stimulated depolarization current, impedance spectroscopy, scanning transmission electron microscopy and in-situ transmission electron microscopy. Collectively this study generates a more insightful understanding of Td in BNT-based ferroelectrics.

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Understanding the depolarization temperature in (Bi_0.5Na_0.5)TiO₃-based ferroelectrics

Abstract

All Science Journal Classification (ASJC) codes

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