Optimizing dielectric energy storage properties of BNT-based relaxor ferroelectric ceramics modified via Ba0.4Sr0.6TiO3

• Published in: Journal of materials science 2024-02, Vol.59 (7), p.2998-3008
• Main Authors: Zhu, Wen, Shen, Zong-Yang
• Format: Article
• Language: English
• Subjects: Capacitors; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Dielectric properties; Efficiency; Electric fields; Electric potential; Electronic Materials; Energy storage; Ferroelectric materials; Ferroelectricity; Grain size; Materials Science; Morphology; Optimization; Perovskite structure; Perovskites; Polymer Sciences; Polyvinyl alcohol; R&D; Relaxors; Research & development; Scanning electron microscopy; Solid Mechanics; Solid phases; Temperature; Voltage
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-024-09444-4

Low-voltage driven ceramic capacitor applications call for relaxor ferroelectric ceramics with superior dielectric energy storage capabilities. Here, the (Bi 0.5 Na 0.5 ) 0.65 (Ba 0.3 Sr 0.7 ) 0.35 (Ti 0.98 Ce 0.02 )O 3  +  x wt% Ba 0.4 Sr 0.6 TiO 3 (BNBSTC +  x BST, x  = 0, 2, 4, 6, 8, 10) ceramics were prepared to systematically investigate the effect of BST content on the phase structure, microscopic morphology and dielectric energy storage properties. A single perovskite structure with a dense and homogenous microstructure is presented in all BNBSTC +  x BST ceramics. A recoverable energy storage density W rec  = 1.39 J/cm 3 with efficiency η  = 81.5% is achieved only under a low electric field of 94 kV/cm in the optimal composition of x  = 6, accompanied by an enhanced dielectric temperature stability meeting the requirement of wider working window. In addition to good frequency, anti-fatigue and temperature stability, the BNBSTC + 6BST ceramics exhibit tremendous potential for designing low-voltage driven energy storage ceramic capacitors.