Nb掺杂(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)无铅弛豫铁电陶瓷储能性能研究  

Energy Storage Properties of Nb-modified(Bi_(0.5)Na_(0.5)_(0.91)Pr_(0.02)Ba_(0.07)TiO_93)Lead-free Relaxor-ferroelectric Ceramics

作　　者：李晓伟 安胜利[1] 韩沛 LI Xiao-wei;AN Sheng-li;HAN Pei(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Analytical 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》2023年第2期38-44,I0003,共8页Chinese Rare Earths

基　　金：内蒙古自治区自然科学基金重大项目(2019ZD12)。

摘　　要：通过固相烧结法掺杂微量Nb到(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)无铅铁电陶瓷,对其相结构、微观形貌、储能行为及介电行为进行了研究。所有样品都形成了单一的钙钛矿相,晶粒细小,Nb掺杂有效地抑制了晶粒长大,在保持较大饱和极化强度基础上降低了剩余极化强度且提高了(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)铁电陶瓷电场强度。掺杂量为0.05 mol时陶瓷在场强139 kV/cm下最大可释放储能密度达到1.85 J/cm^(3),储能效率达到65.75%,获得了较大的介电常数1250且保持稳定。(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)relaxor-ferroelectric ceramics were prepared by conventional solid-state reaction method and the crystal structure,micro-morphology,energy storage behavior and dielectric behavior were systematically investigated.All samples formed a single perovskite phase with fine and tiny crystal grains.Nb doping effectively inhibits the grain growth,decreases the residual polarization intensity and increases the electric field intensity of(Bi_(0.5)Na_(0.5))_(0.91)Pr_(0.02)Ba_(0.07)TiO_(3)ceramics while maintaining a large saturation polarization intensity.When the doping amount is 0.05 mol,the maximum releasable energy storage density of the ceramic reaches 1.85 J/cm^(3)at a field strength of 139 kV/cm,and the energy storage efficiency reaches 65.75%.At the same time,a large dielectric constant of 1250 is obtained and remains stable.

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]