The influences of B-site doping on ferroelectric and energy-storage properties of Bi0.5(Na0.82K0.18)0.5TiO3–LiSbO3 ceramics. (1st August 2022)

• Record Type: Journal Article
• Authors: Yang, Wentao; Uddin, Sarir; Zaman, Arif; Zheng, Guangping
• Is Part Of: Physica scripta. Volume 97:Number 8(2022)
• Publication Date: 2022-08-01
• Subjects: energy storage -- lead-free dielectrics -- perovskite structures -- ferroelectrics -- Raman spectroscopy; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/ac82d1
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: Single-phase Bi0.5 (Na0.82 K0.18 )0.5 Ti1−x Mx O3 –0.01LiSbO3 (BNKT–LS-xM) (M = Ta, Nb or Zr, 0 ≤ x ≤ 0.05) lead-free ceramics are prepared by a solid-state reaction method. The influences of Ta 5+, Zr 4+ or Nb 5+ doping at B-site of perovskite structures on the crystal structure, chemical structure, ferroelectric and energy-storage properties of BNKT–LS ceramics are systematically investigated. Although the introduction of Ta 5+, Zr 4+ and Nb 5+ at B-site could disturb the long-range ferroelectric ordering, Ta 5+ or Nb 5+ doping results in excellent thermal stability of the energy-storage density (as large as 0.7 J cm −3 ) at elevated temperatures (50 °C–200 °C) with a high energy-storage efficiency (>90%). The results demonstrate that the lead-free BNKT–LS-xM ceramics are promising dielectric materials that can be finely tuned for electrical energy storage with high energy storage efficiency and a wide range of operating temperature.