无铅铁电陶瓷(Bi_(0.5)Na_(0.5))_(0.93-x)Pr_(x)Ba_(0.07)TiO_(3)的储能及介电行为研究  

Energy-storage and Dielectric Behaviors of Lead-free Ferroelectric Ceramics (Bi_(0.5)Na_(0.5))_(0.93-x)Pr_(x)Ba_(0.07)TiO_(3)

作　　者：李晓伟 安胜利[1,2] 李雍 韩沛 霍文霞 范秀风 LI Xiao-wei;AN Sheng-li;LI Yong;HAN Pei;HUO Wen-xia;FAN Xiu-feng(School of Metallurgical and Ecological Engineering,University of Science and Technology Bejing,Bejing 100083,China;Anylytical and Testing Center,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]内蒙古科技大学分析测试中心,内蒙古包头014010

出　　处：《稀土》2022年第5期44-49,共6页Chinese Rare Earths

基　　金：内蒙古自然科学基金项目(2022FX07);内蒙古科技厅项目(201803005)。

摘　　要：通过固相烧结法将微量稀土元素Pr掺杂到(Bi_(0.5)Na_(0.5))_(0.93)Ba_(0.07)TiO_(3)铁电陶瓷中,对其相结构、微观形貌、储能行为及介电行为进行了研究。稀土元素Pr的掺杂极大地提升了储能密度及储能效率。掺杂量为0.02 mol时陶瓷在场强92 kV/cm下最大有效储能密度达到1.49 J/cm~3,储能效率达到63.19%,同时显示了良好的高温铁电特性。并获得了较大的介电常数2250,且保持稳定。拥有这些优异性能的无铅铁电陶瓷(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)有望成为未来储能应用的候选者。The(BiNa)BaTiOintroduced by Pr lead-free ferroelectric ceramics successfully fabricated by conventional solid state reaction. The influences of Pr substitution on the phase structure, microstructure, energy storage behavior and dielectric behavior of(BiNa)PrBaTiOwere systematically investigated. The energy-storage density 1.49 J/cm^(3) and the energy storage efficiency 63.19% under the electric field 92 kV/cm are obtained in the(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3), at the same time, the ceramic exhibits good high temperature ferroelectric properties. A large dielectric constant of 2250 is obtained and remains stable. These properties indicate that(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)ceramics might be a promising lead-free ferroelectric material for energy-storage capacitor.

关 键 词：介电行为 储能 铁电陶瓷 钛酸铋钠 

分 类 号：TM282[一般工业技术—材料科学与工程]