Simultaneously achieving large energy storage density and high efficiency in the optimized Sr2NaNb5O15 system with excellent temperature stability at a low electric field

被引：9

作者：

Dan, Yuejun ^{[1
,2
]}

Zheng, Xiao ^{[1
]}

Meng, Yingzhi ^{[1
,2
]}

Wu, Sha ^{[1
,2
]}

Hu, Changzheng ^{[1
,2
,3
]}

Liu, Laijun ^{[1
,2
,3
]}

Fang, Liang ^{[1
,2
,3
]}

机构：

[1] Guilin Univ Technol, Coll Mat Sci & Engn, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Nonferrous Met Oxide Elect Funct Mat & Dev, Guilin 541004, Peoples R China

[2] Guilin Univ Technol, Guangxi Key Lab Opt & Elect Mat & Devices, Guilin 541004, Peoples R China

[3] Guilin Univ Technol, Collaborat Innovat Ctr Explorat Nonferrous Met Dep, Guilin 541004, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Tungsten bronze structure; Large energy storage; High efficiency; Low electric filed; Temperature stability; CERAMIC CAPACITORS; FERROELECTRICS; PERFORMANCES; TRANSITION;

D O I：

10.1016/j.ceramint.2023.12.023

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Lead-free capacitors operating at low electric fields with high-energy density and high efficiency are critical for advanced electronic systems and innovative pulsed power applications. In this work, single tetragonal phase dielectric ceramics with high-energy storage density and high efficiency are prepared using the solid-state method. The co-substitution of Ba2+, Sm3+, and Mn4+ on the Sr2NaNb5O15 substrate enhances low temperature relaxation behavior and polarization modulation due to order/disorder distribution and polar nanoregions (PNRs) in the structural distortion system. Ferroelectric tests revealed that the optimized Sr1.83Ba0.16Sm0.01NaMn0.01Nb4.99O15 tungsten bronze system has large energy storage density (W-rec = 4.432 J cm(-3)) and high efficiency (eta = 84.3 %) at a low electric field (250 kV cm(-1)). In addition, the temperature dependent permittivity results for the Sr1.82Ba0.165Sm0.015NaMn0.015Nb4.985O15 and Sr1.81Ba0.17Sm0.02NaMn0.02Nb4.98O15 ceramic samples demonstrated that they are X9R capacitor-compatible. Finally, Sr1.83Ba0.16Sm0.01NaMn0.01Nb4.99O15 has a current density (CD) of -797.77 A cm(-2) and power density (PD) of similar to 87.75 MW cm(-3) with a very fast discharge time (t0.9 < 60 ns). It is worthy to note that all the components display excellent temperature stability (Delta W-dis < 10 %) in the over-damping test. Thus, this work provides an avenue to obtain dielectric ceramic materials with potential application value in innovative pulse power components.

引用

页码：6801 / 6813

页数：13

共 57 条

[11] Relaxor nature in Ba5RZr3Nb7O30 (R = La, Nd, Sm) tetragonal tungsten bronze new system [J].