BS_(0.5)BNT-based relaxor ferroelectric ceramic/glass-ceramic composites for energy storage  

作　　者：Xuhai Shi Kai Li Zong-Yang Shen Junqi Liu Chaoqun Chen Xiaojun Zeng Bo Zhang Fusheng Song Wenqin Luo Zhumei Wang Yueming Li 

机构地区：[1]China National Light Industry Key Laboratory of Functional Ceramic Materials,Energy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi Province,Advanced Ceramic Materials Research Institute,School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China

出　　处：《Journal of Advanced Ceramics》2023年第4期695-710,共16页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(52267002);Natural Science Foundation of Jiangxi Province(20212ACB204010);Science&Technology Research Project of Jiangxi Provincial Education Department(GJJ211301);the Graduate Innovation Fund of Jiangxi Province(YC2021-S527).

摘　　要：Relaxor ferroelectric ceramics have very high dielectric constant(e)but relatively low electrical breakdown strength(Eb),while glass-ceramics exhibit higher E,due to the more uniformly dispersed amorphous phases and submicrocrystals/nanocrystals inside.How to effectively combine the advantages of both relaxor ferroelectric ceramics and glass-ceramics is of great significance for the development of new dielectric materials with high energy storage performance.In this work,we firstly prepared BaO-SrO-Bi_(2)O_(3)-Na_(2)0-TiO_(2)-Al_(2)O_(3)-SiO_(2)(abbreviated as GS)glass powders,and then fabricated(Ba_(0.3)Sr_(0.7))_(0.5)(Bi_(0.5)Na_(0.5))_(0.5)TiO_(3)+x wt%GS ceramic composites(abbreviated as BSo.sBNT-xGS,x=0,2,6,10,14,16,and 18).Submicrocrystals/nanocrystals with a similar composition to BSo.sBNT were crystalized from the glass,ensuring the formation of uniform core-shell structure in BSo.sBNT-xGS relaxor ferroelectric ceramic/glass-ceramic composites.When the addition amount of GS was 14 wt%,the composite possessed both high&r(>3200 at 1 kHz)and high E,(~170 kV/cm)at room temperature,and their recoverable energy storage density and efficiency were Wrec=2.1 J/cm’and n=65.2%,respectively.The BSo.sBNT-14GS composite also had several attractive properties such as good temperature,frequency,cycle stability,and fast charge-discharge speed.This work provides insights into the relaxor ceramic/glass-ceramic composites for pulsed power capacitors and sheds light on the utilization of the hybrid systems.

关 键 词：relaxor ferroelectrics energy storage ceramics GLASS-CERAMICS Bi_(0.5)Na_(0.5)TiO_(3)(BNT) Ba_(0.3)Sr_(0.7)TiO_(3)(BST) 

分 类 号：TM28[一般工业技术—材料科学与工程] TQ174.75[电气工程—电工理论与新技术]