Temperature-dependent energy storage performance of La2O3-doped(1−x) Bi0.5(Na0.84K0.16)0.5TiO3–xSrTiO3 multifunctional ceramics for piezoelectric sensor applications

• Published in: Journal of materials research 2023-11, Vol.38 (22), p.4902-4912
• Main Authors: Antony Lilly Grace, M., Suvitha, A., Trilaksana, Herri, Athikesavan, Venkatraj, Prathap, Koyada, Judith Jayarani, A.
• Format: Article
• Language: English
• Subjects: Applied and Technical Physics; Biomaterials; Bismuth; Ceramics; Chemical synthesis; Chemistry and Materials Science; Coercivity; Energy storage; Ferroelectricity; Grain size; Inorganic Chemistry; Lanthanum oxides; Materials Engineering; Materials research; Materials Science; Nanotechnology; Perovskites; Piezoelectricity; Solid phases; Substitution reactions; Temperature dependence
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/s43578-023-01200-9

In this work, La 2 O 3 -doped (1 −  x ) Bi 0 . 5 (Na 0 . 84 K 0 . 16 ) 0 . 5 TiO 3 – x SrTiO 3 ceramics where x varies from 0.000 to 0.030 mol%, synthesized by solid-state reaction technique. The La 2 O 3 -doped BNKT–ST ceramics exhibit pure perovskite structures with a tetragonal (P4bm) phase structure. Computational structural properties of ceramics were computed VESTA program. The surface morphology of average grain size has decreased with increasing the substitution of La 2 O 3 ions into the BNKT–ST ceramics. A decrease in the remnant polarization and the coercive field with an increase in the La 2 O 3 concentration is attributed to the change in long-range ferroelectric order. When the La 2 O 3 amount up to 0.020 mol%, doped samples show good piezoelectric coefficient ( d 33 ) exhibiting a maximum of ~ 187 pC/N. The prepared sample shows an energy storage density and efficiency of 0.90 J/cm 3 and η (70%) at 0.97BNKT-0.030ST composition. La 2 O 3 -doped BNKT–ST ceramic optimistic application prospects in the field of high-power density energy storage capacitor and piezoelectric sensor applications. Graphical abstract