Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics
| Autor: | Soukaina Merselmiz, Mimoun El Marssi, Igor A. Luk'yanchuk, M. Spreitzer, M'barek Amjoud, Damjan Vengust, Zdravko Kutnjak, Daoud Mezzane, Zouhair Hanani, Abdelaadim Danine, Nicolas Stein, Yaovi Gagou, Mohammed Lahcini, Mohamed Gouné |
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| Přispěvatelé: | Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IMED-Lab, Université Cadi Ayyad [Marrakech] (UCA), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), UM6P, Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 (LPMC), Université de Picardie Jules Verne (UPJV), Jozef Stefan Institute [Ljubljana] (IJS), Physics Faculty, Southern Federal University [Rostov-on-Don] (SFEDU), The authors gratefully acknowledge the generous financial support of CNRST Priority Program (PPR 15/2015), Slovenian Research Agency Program (P1-0125), and European Union’s Horizon 2020 Research and Innovation Program under the Marie Skłdowska-Curie Grant Agreement (No. 778072). |
| Rok vydání: | 2020 |
| Předmět: |
Phase boundary
Materials science Scanning electron microscope 02 engineering and technology Dielectric 01 natural sciences lcsh:TP785-869 Tetragonal crystal system 0103 physical sciences rod-like Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) Ceramic Composite material dielectric Perovskite (structure) 010302 applied physics [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Ferroelectricity electrocaloric effect Electronic Optical and Magnetic Materials lcsh:Clay industries. Ceramics. Glass visual_art Ceramics and Composites visual_art.visual_art_medium ferroelectric Selected area diffraction 0210 nano-technology lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) |
| Zdroj: | Journal of Advanced Ceramics Journal of Advanced Ceramics, Vol 9, Iss 2, Pp 210-219 (2020) Journal of Advanced Ceramics, 2020, 9 (2), pp.210-219. ⟨10.1007/s40145-020-0361-1⟩ |
| ISSN: | 2226-4108 |
| DOI: | 10.1007/s40145-020-0361-1 |
| Popis: | 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 (ɛr = 11,906, tanδ = 0.014, Pr = 6.01 μgC/cm2, and Ec = 2.46 kV/cm), and electrocaloric properties (ΔT = 0.492 K and gZ = 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. |
| Databáze: | OpenAIRE |
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