Enhanced energy storage and dielectric properties of Bi0.487Na0.427K0.06Ba0.026TiO3-xCeO2 anti-ferroelectric ceramics

被引：63
作者：
Liu, Guocai [1 ]
Fan, Huiqing [1 ]
Dong, Guangzhi [1 ]
Shi, Jing [1 ]
Chang, Qi [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 664卷
关键词：
Energy storage materials; Temperature stability; Dielectric relaxation; Ceramics; LEAD-FREE CERAMICS; ELECTRICAL-PROPERTIES; PEROVSKITE STRUCTURE; NA0.5BI0.5TIO3; SPECTROSCOPY; TEMPERATURE; RELAXATION; CAPACITORS; IMPEDANCE; LANTHANUM;
D O I：
10.1016/j.jallcom.2015.12.260
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to hunt for the promising materials in energy-storage field, we prepared a series of compositions Bi0.487Na0.427K0.06Ba0.026TiO3-xCeO(2) (BNTC1000x, x = 1.8, 2.2, 2.6, 3.0 wt%) by the solid-state reaction method. CeO2 addition degraded the ferroelectricity of initial components and all these samples exhibited antiferroelectricity at room temperature. The optimum energy-storage density of 0.94 J/cm(3) was obtained at BNTC22 with the external electric field of 75 kV/cm. In addition, the energy-storage property not only possessed good temperature stability but also maintained high values over 0.81 J/cm(3) around 200-120 degrees C. These characteristics indicated that Bi0.487Na0.427K0.06Ba0.026TiO3-xCeO(2) system could be the promising lead-free materials for energy-storage capacitor application. The investigation on dielectric properties suggested that the dielectric relaxation behavior was involved in BNTC1000x system and concerned with oxygen vacancy migration. (C) 2016 Elsevier B.V. All rights reserved.
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页码：632 / 638
页数：7
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