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author:

Shu, W. (Shu, W..) [1] | Li, H. (Li, H..) [2] | Huang, Y. (Huang, Y..) [3] | Lin, C. (Lin, C..) [4] | Wu, X. (Wu, X..) [5] | Gao, M. (Gao, M..) [6] | Lin, T. (Lin, T..) [7] | Zhao, C. (Zhao, C..) [8]

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Abstract:

In this work, the frequency dependence of ferroelectric and electrocaloric properties in barium titanate-based ceramics was studied based on Maxwell relations. It is found that the maximum and remnant polarization will decrease while the coercive field increases a lot with rising frequency from 0.1 to 10Hz, indicating that polarization rotation and domain switching become difficult at high frequencies. The electrocaloric properties show the different frequency dependence at different phase structures. Isothermal entropy change (ΔS) and adiabatic temperature change (ΔT) are similar around/above Curie temperature (TC), showing tiny frequency dependence. However, ΔS and ΔT display the obvious frequency dependence below TC, especially in the orthorhombic-tetragonal phase-transition region with a stable ferroelectric phase, and this frequency dependence becomes more obvious under a low-electric field. It is also found that increasing the frequency can weaken the electric field dependence of electrocaloric strength. This work gives a general profile of frequency dependence for electrocaloric properties in ferroelectric ceramics.  © 2024 World Scientific. All rights reserved.

Keyword:

barium titanate Electrocaloric properties ferroelectric ceramics frequency dependence

Community:

  • [ 1 ] [Shu W.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 2 ] [Li H.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 3 ] [Huang Y.]College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, 350117, China
  • [ 4 ] [Lin C.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 5 ] [Wu X.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 6 ] [Gao M.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 7 ] [Lin T.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 8 ] [Zhao C.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China

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Source :

Journal of Advanced Dielectrics

ISSN: 2010-135X

Year: 2024

Issue: 2

Volume: 14

2 . 1 0 0

JCR@2023

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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