Energy storage properties in Nd-doped AgNbTaO_(3) lead-free antiferroelectric ceramics with Nb-site vacancies  

作　　者：Zhilun Lu Dongyang Sun Ge Wang Jianwei Zhao Bin Zhang Dawei Wang Islam Shyha 

机构地区：[1]School of Computing,Engineering and The Built Environment Edinburgh Napier University,Edinburgh EH105DT,UK [2]Department of Materials,University of Manchester,Manchester S139PL,UK [3]Shenzhen Institute of Advanced Electronic Materials Shenzhen Institute of Advanced Technology Chinese Academy of Sciences,Shenzhen 518055,P.R.China

出　　处：《Journal of Advanced Dielectrics》2023年第1期32-38,共7页先进电介质学报（英文）

基　　金：supported by the Royal Society Research Grant(RGSR1221252).

摘　　要：It is crucial to discover lead-free materials with ultrahigh recoverable energy density(Wrec)that can be employed in future pulse power capacitors.In this work,a high Wrec of 4.51 J/cm^(3) was successfully obtained in lead-free Nd-doped AgNb_(0.8)Ta_(0.2)O_(3) antiferroelectric ceramics at an applied electric field of 290 kV/cm.It is discovered that Nd doping paired with Nb-site vacancies could stabilize the antiferroelectric phase by lowering the temperatures of the M1-M2 and M2-M3 phase transitions,which leads to higher energy storage efficiency.Furthermore,Nd and Ta co-doping will contribute to the electrical homogeneity and low electrical conductivity,resulting in large breakdown strengths.Aliovalent doping in Ag-site with Nb-site vacancies serves as a novel strategy for the construction of AgNbO_(3)-based ceramics with excellent energy storage performance.

关 键 词：AgNbO_(3)-based ceramics ANTIFERROELECTRIC energy storage. 

分 类 号：TQ174[化学工程—陶瓷工业]