| Autor: |
Merselmiz, Soukaina, Hanani, Zouhair, Mezzane, Daoud, Spreitzer, Matjaz, Bradesko, Andraz, Fabijan, David, Vengust, Damjan, Hajji, Lahoucine, Abkhar, Zahra, Razumnaya, Anna, Rozic, Brigita, Lukyanchuk, Igor A., Kutnjak, Zdravko |
| Rok vydání: |
2020 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.ceramint.2020.06.163 |
| Popis: |
Lead-free BaTi0.89Sn0.11O3 (BTSn) ceramic was elaborated via a solid-state reaction method and its dielectric, ferroelectric, energy storage, electromechanical as well as electrocaloric properties were investigated at 25 kV/cm. Pure perovskite structure was confirmed by X-ray diffraction analysis. The maximum of the dielectric constant was found to be 17390 at 41 {\deg}C. The enhanced total energy density, the recovered energy density, and the energy storage efficiency of 92.7 mJ/cm3, 84.4 mJ/cm3, and 91.04%, respectively, were observed at 60 {\deg}C, whereas the highest storage efficiency of 95.87 % was obtained at 100 {\deg}C. At room temperature, the electromechanical strain and the large-signal piezoelectric coefficient reached a maximum of 0.07 % and 280 pm/V. The large electrocaloric effect of 0.71 K and the electrocaloric responsivity of 0.28. 10-6 K.mm/kV at 49 {\deg}C under 25 kV/cm were indirectly calculated via Maxwell relation from the ferroelectric polarization P (T, E) that was determined from the P-E hysteresis loops. By exploiting the Landau-Ginzburg-Devonshire (LGD) phenomenological theory, the electrocaloric response was estimated to be of 0.61 K at 50 {\deg}C under 25 kV/cm. We conclude that BTSn lead-free ceramic is a promising candidate for potential applications in high-efficiency energy storage devices and solid-state refrigeration technology. |
| Databáze: |
arXiv |
| Externí odkaz: |
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