Electrostatic energy storage in antiferroelectric like perovskite. (March 2019)

• Record Type: Journal Article
• Authors: Zannen, M.; Belhadi, J.; Benyoussef, M.; Khemakhem, H.; Zaidat, K.; El Marssi, M.; Lahmar, A.
• Is Part Of: Superlattices and microstructures. Volume 127(2019)
• Page Start: 43
• Page End: 48
• Publication Date: 2019-03
• Subjects: Sodium bismuth titanate system -- Ceramics -- Thin films -- Energy storage property; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2018.03.041
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: Lead-free ferroelectric Na0.5 Bi0.5 TiO3 (NBT) and NBT-doped Ln (Ln = Er and Ho) in both bulk and thin films forms were processed via solid-state reaction and solution deposition respectively. SEM investigations showed dense samples with fine-grained and smooth microstructure for thin films. A pure perovskite structure was observed by the X-ray diffraction for all specimens. The frequency dependences of the dielectric constant and loss tangent were investigated at room temperature and revealed a decrease in the dielectric losses with the introduction of the lanthanide element. The energy storage density ( W rec ) was calculated using the obtained P – E loops. The stored and delivered energies were found depending on the form and composition of the sample. Highlights: Ln-doped Bi0.5 Na0.5 TiO3 (BNT) perovskite ceramics and thin films. Improvement of dielectric properties with the incorporation of Ho and Er. Well-shaped hysteresis loops for doped samples in both ceramics and thin films form. Enhancement of the energy-storage properties in thin films compared to ceramics.