Er^(3+)掺杂无铅铁电陶瓷的电学和光致发光性能  

Electrical and Photoluminescent Properties of Er^(3+)-Doped Lead-Free Ferroelectric Ceramics

作　　者：张怡笑 王小丽 杨健[1] 关朋飞 郑明 ZHANG Yixiao;WANG Xiaoli;YANG Jian;GUAN Pengfei;ZHENG Ming(School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《硅酸盐学报》2024年第5期1656-1663,共8页Journal of The Chinese Ceramic Society

基　　金：中央高校基本科研业务费专项资金项目(2022QN1087)。

摘　　要：无铅多功能铁电陶瓷在各类信息的检测、转换、存储及处理中具有广泛的应用,且稀土元素由于其特殊的电子结构和稳定的发光特性,有望赋予铁电陶瓷新的发光性能并改善其电学性能,为设计新型光电器件提供了可能。采用传统的高温固相反应法制备稀土Er^(3+)掺杂Ba_(0.85)Ca_(0.15)Ti_(0.90)Zr_(0.10)O_(3)(BCTZ)无铅多功能铁电陶瓷,系统研究Er^(3+)掺杂浓度对BCTZ铁电陶瓷微观结构、电学性能及光致发光的影响及内在联系。研究表明,陶瓷平均晶粒尺寸随Er^(3+)掺杂浓度的增加单调减小,由7.59μm减小至3.82μm,减小约49.67%;陶瓷可释放的能量密度(Wrec)和储能效率(η)可分别提高约29.81%和122.79%。Er^(3+)掺杂BCTZ陶瓷表现出强烈的绿光发射(548 nm)且发光强度相对可调性可达173.09%。Er^(3+)掺杂BCTZ陶瓷优异、特殊的电光性能,在电介质储能电容器和光学器件等领域具有潜在应用前景。Introduction Ferroelectric materials are widely used in detection,conversion,storage and information processing.The development of energy-saving,environmental protection,multi-functional,miniaturized lead-free multi-functional ceramics becomes inevitable.However,lead-free ferroelectric ceramics as dielectric ceramic capacitors with a low energy storage density and a poor energy storage efficiency seriously hinder their practical application.The development of ceramic capacitors with a high energy storage density and a high energy storage efficiency thus greatly expands the applications of ferroelectric ceramics in the field of energy storage.Doping rare-earth elements is a simple,direct and effective modification method.Rare-earth elements with special electronic structure and stable luminescence properties are expected to give new luminescent properties and improve the electrical properties of ferroelectric ceramics.Ba_(0.85)Ca_(0.15)Ti_(0.90)Zr_(0.10)O_(3)(BCTZ)lead-free piezoelectric ceramics have a small dielectric loss and superior electrical characteristics.Rare-earth element Er^(3+)is widely used in laser and lighting due to its excellent green luminous intensity.In this paper,the effect of Er^(3+)doping amount on the microstructure,ferroelectric,energy storage and photoluminescence properties of BCTZ ceramics and their internal relations was investigated to broaden the applications in photoelectric materials.Methods Er^(3+)doped Ba_(0.85)Ca_(0.15)Ti_(0.90)Zr_(0.10)O_(3)(BCTZ:x%Er^(3+),x=0.0,0.2,0.4,0.6,0.8 and 1.0,in mole fraction)ceramics were prepared by a high-temperature solid-state reaction method.CaCO_(3)(99.9%),ZrO_(2)(99.9%),TiO_(2)(99.9%),BaCO_(3)(99.9%),Er_(2)O_(3)(99.9%)were used as raw materials.The raw materials were firstly mixed and ground in a ball mill for 12 h,and then pre-burned at 1100℃for 6 h after drying The pre-burned materials were naturally cooled to room temperature,granulated and pressed.The pressed samples were sintered at 1300℃for 6 h.The crystal structure of ceramic sampl

关 键 词：稀土掺杂 锆钛酸钡钙 铁电 储能 光致发光 

分 类 号：TM282[一般工业技术—材料科学与工程]