摘要
电介质电容器具有超高的功率密度和超快的充放电速率,因而在脉冲功率技术中具有应用前景。利用固相法制备了(Pb_(0.97)La_(0.02))(Zr_(0.6)Sn_(0.4))O_(3)(PLZS)反铁电陶瓷,研究了不同烧结温度下PLZS陶瓷的晶体结构、微观形貌、介电性能、反铁电及储能性能。结果表明,不同温度烧结的样品均具有正交钙钛矿结构,且随着烧结温度的升高,陶瓷的致密度逐渐提高、晶粒尺寸也逐渐增大。因此,最佳温度下(1225℃)烧结的陶瓷具有最佳的储能性能,可回收能量密度密度约13.3 J/cm^(3),储能效率约83.6%。
Introduction As one of the important electronic components in pulsed power devices,dielectric capacitors have wide applications in hybrid vehicles,and distributed power system.However,a relatively low energy density affects their application in portable and light–weight devices.The dielectric capacitors store and release energy in form of electrostatic polarization and depolarization of dielectric materials.Hence,achieving the maximum polarization(Pmax),small remanent polarization(Pr)and large electric breakdown strength(Eb)in dielectric materials is an effective approach to improve the energy storage properties.The antiferroelectric ceramics are one of the most prospect materials for energy storage due to their unique antiferroelectric–ferroelectric(AFE–FE)phase transition during charging and discharging process.As one of the classic antiferroelectric ceramics,Pb(Zr,Ti)O_(3) antiferroelectric ceramics are widely investigated.However,the content of Ti should be lower than 10%to stabilize the antiferroelectric phase,leading to the narrow windows for compositional regulation.In recent years,Pb(Zr,Sn)O_(3) antiferroelectric ceramics become popular because of the electric field induced multistage phase transition.In this paper,(Pb_(0.97)La_(0.02))(Zr_(0.6)Sn_(0.4))O_(3)(PLZS)antiferroelectric ceramic was synthesized via solid-state sintering at different temperatures.In addition,the crystal structures,microstructures,dielectric properties and energy storage properties of the ceramic were also investigated.Methods PbO,La_(2)O_(3),ZrO_(2) and SnO_(2) were used as raw materials,and weighted and mixed according to the stoichiometry.The mixed materials with alcohol were ground in a ball mill for 12 h.Afterwards,the suspension was dried,the powders were calcined at 900℃for 3 h,and then ground with alcohol for another 12 h.The dried powders with polyvinyl alcohol were pressed into disks with the diameter of 10 mm and the thickness of 1 mm.Finally,the green disks were sintered at 1200–1250℃for 2 h to obtain the d
作者
张楠
张骥
汪尧进
ZHANG Nan;ZHANG Ji;WANG Yaojin(School of Materials Science and Engineering,Nanjing University of Science&Technology,Nanjing 210094,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2024年第4期1211-1216,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(12374085)
中央高校基本科研业务费专项资金项目(30922010309)。
关键词
固相法
反铁电陶瓷
介电性能
储能性能
solid–state reaction
antiferroelectric ceramics
dielectric properties
energy storage properties
