稀土离子La^(3+)掺杂铌酸锶钡玻璃陶瓷储能性能  

Energy Storage Performance of La^(3+)Doped Strontium Barium Niobate Glass Ceramics

作　　者：王娇[1] 汪庆 王远 孙兴 郝好山[1] 刘少辉[1] WANG Jiao;WANG Qing;WANG Yuan;SUN Xing;HAO Haoshan;LIU Shaohui(School of Materials Engineering,Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院材料工程学院,郑州451191

出　　处：《硅酸盐学报》2024年第4期1310-1319,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51902088);河南省高校科技创新人才项目(21HASTIT014);河南省优秀青年基金项目(212300410031);河南省科技攻关计划项目(222102240004,232102230022)。

摘　　要：高功率密度、高能量密度玻璃陶瓷电介质材料在小型化、轻量化、集成化脉冲功率器件领域具有重要的应用价值。通过高温熔融结合温度控制结晶工艺制备出不同La^(3+)掺杂量铌酸锶钡基玻璃陶瓷。测试结果表明:稀土离子La^(3+)掺杂可以提高玻璃陶瓷的结晶度与钨青铜结构Ba_(0.5)Sr_(0.5)Nb_(2)O_(6)相含量,从而提高了铌酸锶钡基玻璃陶瓷的相对介电常数,La^(3+)掺杂铌酸锶钡玻璃陶瓷具有出色的温度稳定性和较低的损耗。稀土离子La^(3+)掺杂可以改善铌酸锶钡基玻璃陶瓷的微观结构同时降低玻璃陶瓷的界面激活能,从而提升玻璃陶瓷的耐击穿场强。对于La^(3+)掺杂的摩尔分数为1.0%时,玻璃陶瓷的耐击穿场强达到了1458 kV/cm,其相应的介电常数为96.3,最高的储能密度达到9.36 J/cm^(3),是未掺杂铌酸锶钡玻璃陶瓷的能量密度2.25倍。该研究对开发高储能密度玻璃陶瓷提供了一种实验思路。Introduction As a core energy storage device of high energy pulse power supply,dielectric energy storage materials have the characteristics of high-power density,fast charging and discharging rate,good temperature stability,and intense aging resistance.They are widely used in power and electronic systems such as hybrid electric vehicles,oil exploration,directional weapons,etc.,especially in high energy pulse power technology,having irreplaceable application prospects.With the rapid development of pulse power electronic systems,higher requirements are placed on the energy storage density,discharge current and time of dielectric capacitors in pulse power systems.These advanced devices are used in scenarios such as 100 kA current or 100 kV high voltage.This becomes some challenges for the energy storage density of dielectric capacitors.In addition,a problem of low energy storage density of dielectric capacitors also makes the pulse power system too large and cumbersome to meet the requirements of practical equipment platforms for small and lightweight high-tech weapons.Dielectric energy storage materials are key materials for pulse power devices,but their low energy storage density severely limits the miniaturization of dielectric capacitors.Further improving the breakdown field strength and increasing the dielectric constant to obtain high energy storage density dielectric materials remain a major challenge.It is necessary to develop new technologies that can improve the energy density of dielectric capacitors or explore new material systems with a high energy storage density.Doping rare-earth oxides into glass ceramics can enhance their dielectric and energy storage properties.The rare-earth element La^(3+)has a unique 4f electron layer structure,large ion radius and a high coordination number.Incorporating La^(3+)into the glass ceramics has an impact on their phase structure,dielectric properties,and energy storage performance.It is thus expected that the energy storage performance of glass ceramics can be improv

关 键 词：铌酸锶钡 玻璃陶瓷 储能性能 介电性能 微观结构 

分 类 号：TQ174.75[化学工程—陶瓷工业]