Realizing high low-electric-field energy storage performance in AgNbO_(3) ceramics by introducing relaxor behaviour
作者机构：Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China Department of ChemistryTsinghua UniversityBeijing100084China College of Materials Science and EngineeringGuilin University of TechnologyGuilin541004China Center on Nanoenergy ResearchSchool of Physical Science and TechnologyGuangxi UniversityNanning530004China
出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)
年 卷 期：2019年第5卷第4期
页 面：597-605页
核心收录：
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
基 金：supported by National Natural Science Foundation of China(Grants 11864004) Guangxi Natural Science Foundation(Grants 2017GXNSFBA198132,2016GXNSFAA380214,2016GXNSFCB380006 and 2017GXNSFFA198015) Science and Technology Major Project of Guangxi,(Grant AA17204100) Innovation Project of Guangxi Graduate Education(Grant YCSW2019053) the funds of the State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing(100084),China
主 题：Low applied electric field Energy storage Relaxor behaviour Silver niobate Anti-ferroelectric
摘 要：Both sustainable development in environment and safety of high-power systems require to develop a novel lead-free dielectric capacitor with high energy density(Wrec)at low applied electric *** this work,a remarkably high Wrec of 2.9 J/cm^(3) accompanying with energy storage efficiency of 56% was achieved in Ag_(0.9)Sr_(0.05)NbO_(3) ceramic at a low applied electric field of 190 kV/cm,by improving antiferroelectricity and introducing relaxor *** improved anti-ferroelectric stability was attributed to the decreased tolerance factor and average electronegativity difference,while the relaxor behaviour was associated with the increased disordered local structure by ***,the Ag_(0.9)Sr_(0.05)NbO_(3) ceramics also exhibited outstanding temperature stability in energy density with small variation less than 5% over 20-140℃.The results indicate that the Ag_(0.9)Sr_(0.05)NbO_(3) ceramic is a promising candidate for low-electric-field driving capacitors.
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