High energy-storage performance in X9R-type Na0.5Bi0.5TiO3-based lead-free ceramics. Issue 10 (15th May 2023)

• Record Type: Journal Article
• Authors: Zhao, Hanyu; Cao, Wenjun; Liang, Cen; Wang, Changyuan; Wang, Chunchang
• Is Part Of: Ceramics international. Volume 49:Issue 10(2023)
• Page Start: 15939
• Page End: 15946
• Publication Date: 2023-05-15
• Subjects: Na0.5Bi0.5TiO3 -- Energy storage -- Thermal stability -- X9R; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2023.01.189
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: KaTaO3 (KT) modified Na0.5 Bi0.5 TiO3 –BaTiO3 lead-free ceramics (1- x )(0.94Na0.5 Bi0.5 TiO3 -0.06BaTiO3 )- x KTaO3 (NBT-BT- x KT, x = 0.20, 0.25, 0.30, and 0.35) were fabricated via the solid-state reaction method. The effect of KT modification on the structural, dielectric, and energy-storage properties of the ceramics were systematically investigated. Our results show that the NBT-BT- x KT sample shows excellent thermal stability of dielectric constant ( Δ ε ′ / ε 25 o C ′ ≤ ±15%) over the temperature range of -60-215 °C with very low loss (≤0.02). Meanwhile, a large energy storage density ( W rec = 4.89 J/cm 3 ), excellent efficiency ( η = 84%), and an ultrafast discharge rate of 29 ns were also achieved in the NBT-BT-0.3 KT ceramic. This work indicates that the NBT-BT-0.30 KT sample would be a promising material for pulsed electrical applications working in extreme environments.