Nd^(3+)掺杂对PLZS反铁电体介电性能和储能性能的影响  

Effect of Nd^(3+)Doping on Dielectric Properties and Energy Storage Properties of PLZS Antiferroelectrics

作　　者：焦安德 赵烨 韩沛 孙宁宁[1] 卢春晓 杜金花 李雍 张奇伟[1] 郝喜红[1] JIAO Ande;ZHAO Ye;HAN Pei;SUN Ninging;LU Chunxiao;DU Jinhua;LI Yong;ZHANG Qiwei;HAO Xihong(Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices,School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古自治区铁电新能源材料与器件重点实验室,内蒙古包头014010

出　　处：《硅酸盐学报》2024年第4期1192-1199,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金青年科学基金项目(52102136)。

摘　　要：近年来,随着科学技术的发展,高功率密度和快速充放电陶瓷引起了人们的广泛关注。采用流延法和固相烧结法制备了Pb_(0.98–1.5x)La_(0.02)Nd_(x)(Zr_(0.60)Sn_(0.40))_(0.99)5O_(3)(x=0,0.02,0.04,0.06,简写为PL100xNZS)反铁电陶瓷,并研究了反铁电陶瓷的相组成、储能性能、介电性能和充放电性能。研究结果表明:PL100xNZS的主晶相为正交相钙钛矿结构,随着Nd^(3+)掺杂量的增多,反铁电–铁电相转变电场(EAFE-FE)增加,故其储能性能增强。当Nd^(3+)掺杂量为x=0.04时,陶瓷的储能密度为14.8 J·cm^(–3),储能效率为85%。此外,充放电测试结果显示PL4NZS陶瓷具有高的电流密度和功率密度,分别为3360 A/cm^(2)和504 MW·cm^(–3),且放电速度极快,t_(0.9)为28 ns。该结果表明PL4NZS材料在脉冲功率电容器领域具有重要的应用价值。Introduction Ceramic-based dielectric capacitors with a high power density are one of the most prospective energy-storage components,compared with Li-ion batteries and super-capacitors.Unfortunately,the energy-storage density of ceramic-based dielectric capacitors is one or two orders of magnitude lower than that of the batteries,which is restricted by the property of dielectric materials.Therefore,developing reliable and high-performance dielectric ceramic is a challenge in the field of dielectric capacitors.Among dielectric ceramics,antiferroelectic(AFE)material is one of the most promising candidates for energy-storage devices since they show a high maximum polarization(Pmax),low remnant polarization(Pr),and a regulated AFE-ferroelectric(FE)phase transition electric field.Recent efforts are made to enhance energy-storage properties of ceramic by component design,ion-doping and material form construct.However,a superiorηis always gained at the cost of a high Wrec,becoming a challenge for synergistically achieving a ultrahigh Wrec and a superiorη.Methods High-purity Pb_(3)O_(4)(≥95.0%,Sinopharm Chemical Reagent Co.,Ltd.,China),La_(2)O_(3)(≥99.9%,Sinopharm Chemical Reagent Co.,Ltd.,China),Nd_(2)O_(3)(>99.99%,Aladdin Biochemical Technology Co.,Ltd.,China),ZrO_(2)(≥99.0%,Sinopharm Chemical Reagent Co.,Ltd.,China),and SnO_(2)(≥99.5%,Sinopharm Chemical Reagent Co.,Ltd.)were used as raw materials.Pb_(0.98–1.5x)La_(0.02)Nd_(x)(Zr_(0.60)Sn_(0.40))_(0.995)O_(3)(PL100xNZS)was selected as a basic system.Nd^(3+)with a small ionic radius(i.e.,1.29Å)was introduced in PLZS to replace Pb^(2+)(i.e.,1.49Å)for enhancing electric filed-induced EFE-AFE.A Pb_(0.98–1.5x)La_(0.02)Nd_(x)(Zr_(0.60)Sn_(0.40))0.995O3 component was designed and the ceramics were fabricated by a tape-casting method.The crystallinity,phase structure and microstructure of PL100xNZS ceramics were analyzed by an X-ray diffractometer(Rigaku Co.,Ltd.,Japan)and a model TESCAN-MIRA3 field-emission scanning electron microscope(TESCAN Co.,Czech).The di

关 键 词：锆锡镧铅反铁电陶瓷 储能密度 介电性能 放电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]