Dielectric, ferroelectric, and energy storage properties in dysprosium doped sodium bismuth titanate ceramics. Issue 16 (November 2018)

• Record Type: Journal Article
• Authors: Benyoussef, Manal; Zannen, Moneim; Belhadi, Jamal; Manoun, Bouchaib; Dellis, Jean-Luc; El Marssi, Mimoun; Lahmar, Abdelilah
• Is Part Of: Ceramics international. Volume 44:Issue 16(2018)
• Page Start: 19451
• Page End: 19460
• Publication Date: 2018-11
• Subjects: NBT-based ceramics -- Dielectric properties -- Ferroelectric properties -- Energy storage; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.07.182
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, Na0.5 (Bi1- x Dy x )0.5 TiO3 (0 ≤ x ≤ 15%) ceramics were prepared via solid state reaction method and were characterized. A stable and pure perovskite phase was revealed by X-ray diffraction analysis for all compositions and a symmetry change from rhombohedral to orthorhombic phase was detected beyond 10% of Dy substitution. The incorporation of Dy 3+ into Sodium Bismuth Titanate (Na0.5 Bi0.5 TiO3 ) matrix allows a substantial decrease of the coercive field, an increase in the resistivity, and leads to a high stability of the dielectric permittivity (∆ ɛ / ɛ (150 °C) ≤ ± 15%) over a wide temperature range. Furthermore, this system was found to exhibit improved energy storage properties at high temperatures with a maximum energy density of 1.2 J/cm 3 obtained for 2%Dy composition at 200 °C. The obtained results are very promising for energy storage capacitors operating at high temperatures.