An alternative way to design excellent energy-storage properties in Na0.5Bi0.5TiO3-based lead-free system by constructing relaxor dielectric composites. Issue 14 (November 2022)

• Record Type: Journal Article
• Authors: Wang, Jun; Li, Tianyu; Jiang, Xuewen; Zhou, Cong; Xu, Yuanjie; Shi, Ruijian; Liu, Liqiang; Chu, Baojin; Zhao, Zhe; Zuo, Ruzhong
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 14(2022)
• Page Start: 6512
• Page End: 6517
• Publication Date: 2022-11
• Subjects: Lead-free -- Na0.5Bi0.5TiO3 -- Dielectric composite -- Relaxor -- Energy-storage; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.07.025
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: With growing concerns over environmental protection, lead-free dielectric ceramic capacitors are attracting much attention. In this work, a series of novel (1- x ) Na0.5 Bi0.5 TiO3 - x Ba5 LaTi3 Ta7 O30 ((1- x )NBT- x BLTT) dielectric composite ceramics were fabricated by a traditional solid‐state method. All the samples possess a compact microstructure with refined grain morphology with increasing BLTT content, and tend to exhibit a diphase dielectric composite as x reaches up to 0.05. Furthermore, the addition of BLTT enhances the dielectric relaxor behavior of NBT-based ceramics, such that the x = 0.15 composite ceramic exhibits a typical feature of relaxor ferroelectrics. As a result, a high recoverable energy-storage density of W rec ~3.67 J/cm 3, an ultrahigh energy-storage efficiency of η ~97.3%, and a high power density of P D ~333 MW/cm 3 can be simultaneously obtained in the x = 0.15 relaxor composite ceramic. This study provides an alternative way to design excellent energy-storage performances in NBT-based compositions through constructing dielectric relaxor composites via introducing non-polar tungsten bronze oxides.