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Research Article | Open Access

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Zouhair HANANIa,bSoukaina MERSELMIZaAbdelaadim DANINEcNicolas STEINcDaoud MEZZANEaM’barek AMJOUDa( )Mohammed LAHCINIa,dYaovi GAGOUeMatjaz SPREITZERfDamjan VENGUSTfZdravko KUTNJAKfMimoun El MARSSIeIgor A. LUK'YANCHUKe,gMohamed GOUNÉb
IMED-Lab, Cadi Ayyad University, Marrakesh 40000, Morocco
ICMCB, University of Bordeaux, Pessac 33600, France
IJL, University of Lorraine, Nancy 54000, France
UM6P, Ben Guerir 43150, Morocco
LPMC, University of Picardy Jules Verne, Amiens 80039, France
Jozef Stefan Institute, Ljubljana 1000, Slovenia
Physics Faculty, Southern Federal University, Rostov-on-Don 344090, Russia
Show Author Information

Abstract

Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) lead-free ceramics demonstrated excellent dielectric, ferroelectric, and piezoelectric properties at the morphotropic phase boundary (MPB). So far, to study the effect of morphological changes on dielectric and ferroelectric properties in lead-free BCZT ceramics, researchers have mostly focused on the influence of spherical grain shape change. In this study, BCZT ceramics with rod-like grains and aspect ratio of about 10 were synthesized by surfactant-assisted solvothermal route. X-ray diffraction (XRD) and selected area electron diffraction (SAED) performed at room temperature confirm the crystallization of pure perovskite with tetragonal symmetry. Scanning electron microscopy (SEM) image showed that BCZT ceramics have kept the 1D rod-like grains with an average aspect ratio of about 4. Rod-like BCZT ceramics exhibit enhanced dielectric ferroelectric (εr = 11,906, tanδ = 0.014, Pr = 6.01 µC/cm², and Ec = 2.46 kV/cm), and electrocaloric properties (ΔT = 0.492 K and ζ = 0.289 (K·mm)/kV at 17 kV/cm) with respect to spherical BCZT ceramics. Therefore, rod-like BCZT lead-free ceramics have good potential to be used in solid-state refrigeration technology.

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Journal of Advanced Ceramics
Pages 210-219
Cite this article:
HANANI Z, MERSELMIZ S, DANINE A, et al. Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics. Journal of Advanced Ceramics, 2020, 9(2): 210-219. https://doi.org/10.1007/s40145-020-0361-1

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Received: 29 October 2019
Revised: 24 December 2019
Accepted: 12 January 2020
Published: 07 April 2020
© The author(s) 2020

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