Effects of sintering method on the structural, dielectric and energy storage properties of AgNbO3 lead-free antiferroelectric ceramics

被引:34
作者
Li, Tianyu [1 ]
Cao, Wenjun [1 ]
Chen, Pengfei [1 ]
Wang, Jinsong [1 ]
Wang, Chunchang [1 ,2 ]
机构
[1] Anhui Univ, Sch Phys & Mat Sci, Lab Dielect Funct Mat, Hefei 230601, Peoples R China
[2] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
ANTI-FERROELECTRIC CERAMICS; HIGH-POWER DENSITY; LOW ELECTRIC-FIELD; PHASE-TRANSITION; GRAIN-SIZE; PERFORMANCE; EFFICIENCY; STABILITY; BATIO3;
D O I
10.1007/s10853-021-06148-x
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, we systematically investigated the effects of single-step and two-step sintering methods on the structural, dielectric and energy storage properties of pure AgNbO3 lead-free antiferroelectric ceramics. Compared with the single-step sintered ceramic, the ceramic prepared by two-step sintering method has smaller grain size, dense and homogeneous microstructure. In addition, the results of dielectric temperature spectra reveal that the two-step sintering method hardly changes the phase transition temperature of AgNbO3 ceramics but greatly decreases the dielectric loss value. Most importantly, the ceramic prepared by the two-step sintering method displays high breakdown electric field strength (22 kV/mm), larger recoverable energy storage density-W-rec (2.59 J/cm(3)) and higher energy storage efficiency-eta (45%) as well as excellent temperature stability than those of the ceramic by single-step sintering method. Furthermore, it also exhibited high power density (P-D = 25.7 MW/cm(3)) and extremely fast charge-discharge speed (25 ns). Our results provide a simple and novel way to design high-performance AgNbO3-based energy storage lead-free ceramics.
引用
收藏
页码:13499 / 13508
页数:10
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