Enhanced energy-storage properties of 0.89Bi0.5Na0.5TiO3-0.06BaTiO3-0.05K0.5Na0.5NbO3 lead-free anti-ferroelectric ceramics by two-step sintering method

被引：127
作者：
Ding, Jianxiang
Liu, Yunfei [1 ]
Lu, Yinong
Qian, Hao
Gao, Hong
Chen, Hu
Ma, Chengjian
机构：
[1] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China
来源：
MATERIALS LETTERS | 2014年 / 114卷
关键词：
0.89BNT-0.06BT-0.05KNN ceramics; Two-step sintering; Microstructure; Electrical properties; ELECTRICAL-PROPERTIES; CAPACITOR; BEHAVIOR; DENSITY; BATIO3; GROWTH;
D O I：
10.1016/j.matlet.2013.09.103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work compared the effects of different sintering methods on the microstructure and anti-ferroelectric properties of lead-free 0.89Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3)-0.05K(0.5)Na(0.5)NbO(3) ternary system ceramics. The ceramics by two-step sintering method had smaller grain size and more uniform microstructure than those of the ceramics by single-step sintering method. The mechanism of grain growth in different sintering methods is discussed. The ceramics by two-step sintering method exhibited better anti-ferroelectricties than those of the ceramics by single-step sintering method. The polarization hysteresis (P-E) loop showed optimum electrical performances with a low remanent polarization (P-r = 5.4 mu C/cm(2)) and a coercive field (E-c = 8.2 kV/cm), and the energy density (W) reached 0.90 J/cm(3) at 10 Hz. The storage capacity is three times that of the single-step sintering ceramics. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 110
页数：4
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