摘要
采用SrSc_(0.5)Nb_(0.5)O_(3)与(Bi_(0.5)Na_(0.5))(Ti_(0.95)Al_(0.025)Nb_(0.025))O_(3)固溶构建了无铅陶瓷体系材料(1-x)(Bi_(0.5)Na_(0.5)Ti_(0.95)Al_(0.025)-Nb_(0.025)O_(3))-x(SrSc_(0.5)Nb_(0.5)O_(3))(简记为(1-x)BNTA-xSSN,x=5%、10%、15%、20%,摩尔分数)。通过传统固相反应法制备陶瓷,研究了SrSc_(0.5)Nb_(0.5)O_(3)的引入对其结构、相变、储能和介电性能的影响。研究结果表明,(1-x)BNTA-xSSN样品为钙钛矿结构。其最大介电常数对应温度Tm随着SSN含量的增加而减小,相结构由四方相向伪立方相发生转变,陶瓷的铁电性减弱,弛豫性增强。当x=10%时,样品具有最大有效储能密度(Wrec)2.7 J/cm^(3);当x=15%时,样品具有最大储能效率(η)85%。
A new lead-free ceramic system(1-x)(Bi_(0.5)Na_(0.5)Ti_(0.95)Al_(0.025)Nb_(0.025)O_(3))-x(SrSc_(0.5)Nb_(0.5)O_(3))[(1-x)BNTA-xSSN,x=0.05、0.1、0.15、0.2]was prepared by solid-state method.The effects of the introduction of SrSc_(0.5)Nb_(0.5)O_(3)on the structure,phase transformation,energy storage and dielectric properties were studied.The results showed that(1-x)BNTA-xSSN owns perovskite structure at room temperature.The Tm decreases with the increase of SSN content,and the phase structure changes from tetragonal phase to pseudo-cubic phase.The ferroelectric properties of the ceramics were weakened and the relaxation ferroelectric properties were enhanced.When x=10%,the maximum effective energy storage density(Wrec)of BNTA-SSN ceramics is 2.7 J/cm^(3).The maximum energy storage efficiency(η)of BNTA-SSN ceramics is 85%at x=15%.
作者
朱明星
戴中华
ZHU Mingxing;DAI Zhonghua(Tongling Polytechnic Department of Mechanical Engineering,Tongling 244000,China;School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2023年第3期228-234,共7页
Chinese Journal of Materials Research
基金
国家自然科学基金(51062014)
陕西省重点研发计划(2023-YBGY-423)
西安市智能重点实验室项目(2019220514SYS020CG042)。
关键词
无机非金属材料
相结构
陶瓷
弛豫铁电体
储能密度
inorganic non-metallic materials
phase structure
ceramics
relaxor ferroelectrics
energy storage density
