Phase transitions, energy storage performances and electrocaloric effect of the lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 ceramic relaxor
RAZUMNAYA, Anna
Faculty of Physics
Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 [LPMC]
Faculty of Physics
Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 [LPMC]
HOUMMADA, Khalid
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
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Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Materials Science: Materials in Electronics. 2019-04, vol. 30, n° 7, p. 6430-6438
Springer Verlag
Résumé en anglais
Lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) ceramic exhibits excellent dielectric, ferroelectric and piezoelectric properties at the morphotropic phase boundary (MPB). Previously, we demonstrated that the use of the anionic ...Lire la suite >
Lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) ceramic exhibits excellent dielectric, ferroelectric and piezoelectric properties at the morphotropic phase boundary (MPB). Previously, we demonstrated that the use of the anionic surfactant sodium dodecyl sulfate (SDS, NaC12H25SO4) could enhance the dielectric properties of BCZT ceramic using surfactant-assisted solvothermal processing [1]. In the present study, structural, dielectric, ferroelectric properties, as well as electrocaloric effect and energy storage performances of this BCZT ceramic were thoroughly investigated. X-ray diffraction (XRD) measurements revealed the presence of single perovskite phase at room temperature with the coexistence of orthorhombic and tetragonal symmetries. In-situ Raman spectroscopy results confirmed the existence of all phase transitions from rhombohedral through orthorhombic and tetragonal to cubic symmetries when the temperature varies as reported in undoped-BaTiO3. Evolution of energy storage performances with temperature have been investigated. BCZT ceramic exhibits a high energy storage efficiency of ~ 80% at 120 °C. In addition, the electrocaloric responsivity was found to be 0.164 × 10−6 K·m/V at 363 K.< Réduire
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