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A novel relaxor (Bi,Na,Ba)(Ti,Zr)O 3 lead‐free ceramic with high energy storage performance
Author(s) -
Bilal Muhammad Kashif,
Wang Jian,
Bashir Rabia,
Liu Huan,
Asif Sana Ullah,
Xie Jiyang,
Hu Wanbiao
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17785
Subject(s) - materials science , ceramic , capacitor , energy storage , thermal stability , ferroelectricity , atmospheric temperature range , ceramic capacitor , mineralogy , analytical chemistry (journal) , voltage , optoelectronics , composite material , electrical engineering , thermodynamics , chemical engineering , dielectric , power (physics) , chemistry , physics , chromatography , engineering
Energy storage ceramic capacitors advance in high power density and working voltage, but challenge in simultaneously large recoverable energy density ( W rec ), high energy efficiency ( η ), and good thermal stability. To achieve this, a novel lead‐free ceramic system (1‐ x )(Bi 0.5 Na 0.5 )TiO 3 ‐ x (BaZr 0.3 Ti 0.7 O 3 ) [(1‐ x )BNT‐ x BZT] was explored by tailoring the ferroelectric relaxor states. The introduction of BZT gradually promotes the transformation of ferroelectric states into relaxor states at around the room temperature for x = 0.3‐0.5 that presents a pinched P‐E loop. The optimized composition of x = 0.45 possesses a large W rec of up to 2.6 J/cm 3 and ultrahigh ƞ of 94%, with only a small variation (±8%) in W rec and the high ƞ (90%) over a broad temperature range (−30°C to 180°C), demonstrating the superior performances compared to many existing lead‐free ceramics. The remarkable advantages of the novel BNT‐BZT lead‐free ceramics explored in this study are thus promising for the high‐efficiency and temperature‐stable energy storage capacitor applications.