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arXiv · 2503.08519

Improved thermal stability of dielectric properties and energy storage properties of lead-free relaxor Ba(1-x)LaxTi0.89Sn0.11O3 ceramics

S. Khardazi·D. Mezzane·M. Amjoud·N. Novak·E. Choukri·S. Lyubchyk·Z. Kutnjak·B. Rožič·S. Terenchuk·I. Lukyanchuk
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Abstract

Lead-free perovskite ceramics Ba(1-x)LaxTi0.89Sn0.11O3 with x= 0, 0.015, 0.025, and 0.035 (BLTSnx) were synthesized by solid-state reaction method. The enhanced energy storage properties were studied across the ferroelectric relaxor conversion. The pure perovskite structure of all prepared samples was confirmed by X-ray diffraction (XRD) analysis and the Raman spectroscopy technique. Scanning electron microscopy micrographs show a drastic decrease in the grain size in La-doped ceramics. Furthermore, the doped samples exhibit smeared phase transition and frequency dispersion in dielectric permittivity, typical for relaxors. The P-E hysteresis loops become thin with the increase of the La-doping, demonstrating the ferroelectric-relaxor phase conversion. The enhanced recovered energy density and the energy storage efficiency of 158.8 mJ/cm3 and 82.73 % were observed in the BLTSn2.5 sample at room temperature, respectively. These properties indicate that environmentally friendly BLTSn2.5 is a viable candidate for energy-storage capacitor applications near room temperature.

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S. Khardazi, D. Mezzane, M. Amjoud, N. Novak, E. Choukri, S. Lyubchyk, Z. Kutnjak, B. Rožič, S. Terenchuk, I. Lukyanchuk. 2025-03-11. Improved thermal stability of dielectric properties and energy storage properties of lead-free relaxor Ba(1-x)LaxTi0.89Sn0.11O3 ceramics. https://arxiv.org/abs/2503.08519

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