Electrocaloric effect and high energy storage efficiency in lead-free Ba0.95Ca0.05Ti0.89Sn0.11O3 ceramic elaborated by sol-gel method

Youness Hadouch , Said Ben Moumen , Hanane Mezzourh , Daoud Mezzane (1) , M'Barek Amjoud , Bouchra Asbani (1) , Anna G. Razumnaya (1) , Yaovi Gagou (1) , Brigita Rozic , Zdravko Kutnjak , Mimoun El Marssi (1)

1 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081

Structural, dielectric, ferroelectric, energy storage properties, and electrocaloric effect were studied in lead-free ceramic Ba0.95Ca0.05Ti0.89Sn0.11O3 (BCTSn) elaborated by the sol-gel method. Phase purity structure was confirmed from X-ray data using the Rietveld refinement analysis which revealed the coexistence of tetragonal (P4mm) and orthorhombic (Amm2) symmetries at room temperature. Phase transitions were detected by dielectric and differential scanning calorimetry measurements. The energy storage properties were determined from P-E hysteresis, and the electrocaloric properties were calculated indirectly via the Maxwell approach. The large value of electrocaloric temperature change of Delta T = 0.807 K obtained at a relatively small electric field of 30 kV cm(-1), and the high energy storage efficiency can make BCTSn ceramic a promising candidate for environmentally friendly refrigeration and energy storage applications.

Domaines: Matière Condensée [cond-mat]

Youness Hadouch, Said Ben Moumen, Hanane Mezzourh, Daoud Mezzane, M'Barek Amjoud, et al.. Electrocaloric effect and high energy storage efficiency in lead-free Ba0.95Ca0.05Ti0.89Sn0.11O3 ceramic elaborated by sol-gel method. Journal of Materials Science: Materials in Electronics, 2022, 33 (4), pp.2067-2079. ⟨10.1007/s10854-021-07411-2⟩. ⟨hal-03627363⟩