P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications  

作　　者：Dongxu LI Zong-Yang SHEN Zhipeng LI Wenqin LUO Xingcai WANG Zhumei WANG Fusheng SONG Yueming LI 

机构地区：[1]Energy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi Province,China National Light Industry Key Laboratory of Functional Ceramic Materials,School of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333000,China [2]Chengdu Hongke Electronic Technology Co.,Ltd.,Chengdu,610000,China

出　　处：《Journal of Advanced Ceramics》2020年第2期183-192,共10页先进陶瓷（英文）

基　　金：This work was financially supported by National Natural Science Foundation of China(51767010);Science&Technology Key Research Project of Jiangxi Provincial Education Department(GJJ170760);Graduate Student Innovation Fund of Jiangxi Province(YC2018-S295).

摘　　要：(Ba0.3Sr0.7)x(Bi0.5Na0.5)1-xTiO3(BSxBNT,x=0.3–V0.8)ceramics were prepared to investigate their structure,dielectric and ferroelectric properties.BSxBNT ceramics possess pure perovskite structure accompanied from a tetragonal symmetry to pseudo-cubic one with the increase of x value,being confirmed by X-ray diffraction(XRD)and Raman results.The Tm corresponding to a temperature in the vicinity of maximum dielectric constant gradually decreases from 110℃(x=0.3)to-45℃(x=0.8),across Tm=36℃(x=0.5)with a maximum dielectric constant(ɛr=5920@1 kHz)around room temperature.The saturated polarization Ps gradually while the remnant polarization Pr sharply decreases with the increase of x value,making the P-E hysteresis loop of BSxBNT ceramics goes slim.A maximum difference between Ps and Pr(Ps-Pr)is obtained for BSxBNT ceramics with x=0.5,at which a high recoverable energy density(Wrec=1.04 J/cm3)is achieved under an applied electric field of 100 kV/cm with an efficiency ofη=77%.Meanwhile,the varied temperature P-E loops,fatigue measurements,and electric breakdown characteristics for the sample with x=0.5 indicate that it is promising for pulsed power energy storage capacitor candidate materials.

关 键 词：energy storage ceramics Ba0.3Sr0.7TiO3(BST) Bi0.5Na0.5TiO3(BNT) relaxor ferroelectrics pulsed power capacitor 

分 类 号：TQ174.758.11[化学工程—陶瓷工业] TM53[化学工程—硅酸盐工业]