The temperature-dependent electrical properties of Bi0.5Na 0.5TiO3-BaTiO3-Bi0.5K 0.5TiO3 near the morphotropic phase boundary

Shan Tao Zhang, Bin Yang, Wenwu Cao

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

Bi0.5Na0.5TiO3-BaTiO3-Bi 0.5K0.5TiO3 (BNT-BT-BKT) lead-free piezoceramics with compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB) were prepared and investigated. At room temperature, all ceramics show excellent electrical properties. In this study, the best properties were observed in 0.884BNT-0.036BT-0.08BKT, with the remnant polarization, bipolar total strain, unipolar strain, piezoelectric constant, and planar electromechanical coupling factor being 34.4 μC cm-2, 0.25%, 0.15%, 122 pC N-1, and 0.30, respectively. Detailed analysis of the temperature dependence of polarization-electric field (P-E) loops and bipolar/unipolar strain-electric field (S-E) curves of this composition revealed a ferroelectric-antiferroelectric phase transition around 100 °C. Around this temperature, there is a significant shape change in both P-E and S-E curves, accompanied by enhanced strain and decreased polarization; the largest recoverable strain reaches 0.42%. These results can be explained by the formation of antiferroelectric order and the contribution of field-induced antiferroelectric-ferroelectric phase transition to piezoelectric response. Our results indicate that BNT-BT-BKT lead-free piezoceramics can have excellent electrical properties in compositions near the MPB and also reveal some insight into the temperature dependence of the electrical performance with the MPB composition.

Original languageEnglish (US)
Pages (from-to)469-475
Number of pages7
JournalActa Materialia
Volume60
Issue number2
DOIs
StatePublished - Jan 1 2012

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Phase boundaries
Electric properties
Electric fields
Polarization
Chemical analysis
Temperature
Ferroelectric materials
Lead
Phase transitions
Electromechanical coupling

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

@article{867a81a368c644d6a518f7b14a9f3f2a,
title = "The temperature-dependent electrical properties of Bi0.5Na 0.5TiO3-BaTiO3-Bi0.5K 0.5TiO3 near the morphotropic phase boundary",
abstract = "Bi0.5Na0.5TiO3-BaTiO3-Bi 0.5K0.5TiO3 (BNT-BT-BKT) lead-free piezoceramics with compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB) were prepared and investigated. At room temperature, all ceramics show excellent electrical properties. In this study, the best properties were observed in 0.884BNT-0.036BT-0.08BKT, with the remnant polarization, bipolar total strain, unipolar strain, piezoelectric constant, and planar electromechanical coupling factor being 34.4 μC cm-2, 0.25{\%}, 0.15{\%}, 122 pC N-1, and 0.30, respectively. Detailed analysis of the temperature dependence of polarization-electric field (P-E) loops and bipolar/unipolar strain-electric field (S-E) curves of this composition revealed a ferroelectric-antiferroelectric phase transition around 100 °C. Around this temperature, there is a significant shape change in both P-E and S-E curves, accompanied by enhanced strain and decreased polarization; the largest recoverable strain reaches 0.42{\%}. These results can be explained by the formation of antiferroelectric order and the contribution of field-induced antiferroelectric-ferroelectric phase transition to piezoelectric response. Our results indicate that BNT-BT-BKT lead-free piezoceramics can have excellent electrical properties in compositions near the MPB and also reveal some insight into the temperature dependence of the electrical performance with the MPB composition.",
author = "Zhang, {Shan Tao} and Bin Yang and Wenwu Cao",
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The temperature-dependent electrical properties of Bi0.5Na 0.5TiO3-BaTiO3-Bi0.5K 0.5TiO3 near the morphotropic phase boundary. / Zhang, Shan Tao; Yang, Bin; Cao, Wenwu.

In: Acta Materialia, Vol. 60, No. 2, 01.01.2012, p. 469-475.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The temperature-dependent electrical properties of Bi0.5Na 0.5TiO3-BaTiO3-Bi0.5K 0.5TiO3 near the morphotropic phase boundary

AU - Zhang, Shan Tao

AU - Yang, Bin

AU - Cao, Wenwu

PY - 2012/1/1

Y1 - 2012/1/1

N2 - Bi0.5Na0.5TiO3-BaTiO3-Bi 0.5K0.5TiO3 (BNT-BT-BKT) lead-free piezoceramics with compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB) were prepared and investigated. At room temperature, all ceramics show excellent electrical properties. In this study, the best properties were observed in 0.884BNT-0.036BT-0.08BKT, with the remnant polarization, bipolar total strain, unipolar strain, piezoelectric constant, and planar electromechanical coupling factor being 34.4 μC cm-2, 0.25%, 0.15%, 122 pC N-1, and 0.30, respectively. Detailed analysis of the temperature dependence of polarization-electric field (P-E) loops and bipolar/unipolar strain-electric field (S-E) curves of this composition revealed a ferroelectric-antiferroelectric phase transition around 100 °C. Around this temperature, there is a significant shape change in both P-E and S-E curves, accompanied by enhanced strain and decreased polarization; the largest recoverable strain reaches 0.42%. These results can be explained by the formation of antiferroelectric order and the contribution of field-induced antiferroelectric-ferroelectric phase transition to piezoelectric response. Our results indicate that BNT-BT-BKT lead-free piezoceramics can have excellent electrical properties in compositions near the MPB and also reveal some insight into the temperature dependence of the electrical performance with the MPB composition.

AB - Bi0.5Na0.5TiO3-BaTiO3-Bi 0.5K0.5TiO3 (BNT-BT-BKT) lead-free piezoceramics with compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB) were prepared and investigated. At room temperature, all ceramics show excellent electrical properties. In this study, the best properties were observed in 0.884BNT-0.036BT-0.08BKT, with the remnant polarization, bipolar total strain, unipolar strain, piezoelectric constant, and planar electromechanical coupling factor being 34.4 μC cm-2, 0.25%, 0.15%, 122 pC N-1, and 0.30, respectively. Detailed analysis of the temperature dependence of polarization-electric field (P-E) loops and bipolar/unipolar strain-electric field (S-E) curves of this composition revealed a ferroelectric-antiferroelectric phase transition around 100 °C. Around this temperature, there is a significant shape change in both P-E and S-E curves, accompanied by enhanced strain and decreased polarization; the largest recoverable strain reaches 0.42%. These results can be explained by the formation of antiferroelectric order and the contribution of field-induced antiferroelectric-ferroelectric phase transition to piezoelectric response. Our results indicate that BNT-BT-BKT lead-free piezoceramics can have excellent electrical properties in compositions near the MPB and also reveal some insight into the temperature dependence of the electrical performance with the MPB composition.

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