Enhanced energy-storage performance of (1-x)(0.72Bi0.5Na0.5TiO3-0.28Bi0.2Sr0.7▭ 0.1TiO3)-xLa ceramics

被引：85

作者：

Li, Qiang ^{[1
]}

Zhang, Weiming ^{[1
]}

Wang, Chao ^{[1
]}

Ning, Li ^{[1
]}

Wang, Chao ^{[1
]}

Wen, Yun ^{[1
]}

Hu, Bin ^{[1
]}

Fan, Huiqing ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 775卷

关键词：

Dielectric properties; Energy-storage properties; Capacitors; FERROELECTRIC PROPERTIES; DIELECTRIC CHARACTERIZATION; BREAKDOWN STRENGTH; CRYSTAL-STRUCTURES; PHASE-TRANSITION; BNT-BT; TITANATE; NANBO3; STRAIN; LA2O3;

D O I：

10.1016/j.jallcom.2018.10.092

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：

Leed-free ferroelectric (1-x)(0.72Bi(0.5)Na(0.5)TiO(3)-0.28Bi(0.2)Sr(0.7 rectangle 0.1)TiO(3))-xLa (NBST-xLa; x = 0, 0.5%, 1.5%, 2%) ceramics were synthesized using a conventional solid-state reaction method and the effect of Ladoping on the microstructure and electrical properties was investigated. The introduction of La could reduce the grain size and improve the porosity of NBST ceramics. Temperature-dependent dielectric permittivity illustrated that the relaxation properties of NBST-xLa ceramics changed parabolically with the increase of La content. The introduction of La gave rise to a large dielectric breakdown strength and maximum polarization when x = 0.5%, which was attributed to the variation of the microstructure and the relaxation properties of NBST-xLa ceramics, respectively. The optimum effective energy storage density of 1.2 J/cm(3) at 90 kV/cm was achieved when x = 0.5%. These results indicated that NBST-0.5%La ceramic may provide a practical perspective for energy storage ceramics research. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：116 / 123

页数：8

共 61 条

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