A new family of high temperature stability and ultra-fast charge-discharge KNN-based lead-free ceramics

被引：14

作者：

Peng, Zhanhui ^{[1
]}

Shi, Qiangqiang ^{[1
,2
]}

Zhang, Fudong ^{[1
]}

Liu, Jianfei ^{[3
]}

Nie, Xinru ^{[1
]}

Wang, Jitong ^{[1
]}

Xu, Shudong ^{[1
]}

Wu, Di ^{[1
]}

Yang, Zupei ^{[1
]}

Chao, Xiaolian ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Shaanxi Key Lab Adv Energy Devices, Sch Mat Sci & Engn, Xian 710062, Shaanxi, Peoples R China

[2] Shaanxi Coal Chem Ind Technol Res Inst Co Ltd, Xian 710065, Peoples R China

[3] Northwest Inst Nonferrous Met Res, Xian 710065, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2022年 / 57卷 / 22期

基金：

美国国家科学基金会;

关键词：

ENERGY-STORAGE PROPERTIES; GRAIN-SIZE; RELAXOR CERAMICS; POWER-DENSITY; PERFORMANCE; EFFICIENCY; TRANSPARENCY; DIELECTRICS; CAPACITORS;

D O I：

10.1007/s10853-022-07265-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dielectric ceramic capacitors have been widely used in pulse-power technology because of their good performance of high power density and fast discharge speed. A series of lead-free relaxor ceramics (1-x)K0.5Na0.5NbO3-xLa(Mn0.5Ni0.5)O-3 (KNN-xLMN) featuring with considerable charge-discharge behavior and energy storage properties were designed and prepared in this work. The grain size of ceramics decreases to 180 +/- 20 nm, and the dispersion coefficient is > 1.6, both of which are beneficial to obtain slender P-E loops and improve the energy storage performance in K0.5Na0.5NbO3 ceramics upon La(Mn0.5Ni0.5)O-3 doping. Consequently, acceptable dielectric properties (maximum permittivity epsilon(r) of 1693, Delta epsilon/epsilon(100 degrees C) <= +/- 15% from 33 degrees C to 309 degrees C, minimum dielectric loss tan delta of 0.028, 50 kHz) and a high recoverable energy storage density (W-rec similar to 1.65 J/cm(3)) accompanied by high energy storage efficiency (eta similar to 76%) were obtained simultaneously in 0.97KNN-0.03LMN ceramics. Meanwhile, 0.97KNN-0.03LMN composition exhibited satisfactory charge-discharge performance (P-D similar to 155 MW/cm(3), t(0.9) similar to 55 ns) and temperature stability (30 similar to 110 degrees C). This work not only proposes an efficient strategy to realize high energy storage and ultra-fast charge-discharge performance in lead-free KNN based ceramics, but also provide an candidate material for application of advanced pulsed power capacitors.

引用

页码：9992 / 10002

页数：11

共 46 条

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