SiO_(2)包覆层对BaTiO_(3)@SiO_(2)复合陶瓷微观结构和储能性能的影响  

Effects of SiO_(2) coating on microstructure and energy storage performance of BaTiO 3@SiO_(2) composite Ceramics

作　　者：刘嘉辰 吴佳伟 刘跃明 同阳[1,2] 马江微 雍辉 胡季帆 LIU Jiachen;WU Jiawei;LIU Yueming;TONG Yang;MA Jiangwei;YONG Hui;HU Jifan(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Laboratory of Magnetic and Electric Functional Materials and the Applications,The Key Laboratoryof Shanxi Province,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024 [2]太原科技大学磁电功能材料及应用山西省重点实验室,太原030024

出　　处：《功能材料》2024年第6期6153-6159,共7页Journal of Functional Materials

基　　金：国家自然科学基金(62201376);山西省回国留学人员科研资助项目(2023-153);山西省基础研究计划项目(202303021212215);优秀来晋博士科研资助(20232030);太原科技大学科研启动基金(20222120)。

摘　　要：为了获得高击穿场强和高能量密度的复合陶瓷材料储能电容器,其难点之一是研究应用于复合陶瓷材料的纳米颗粒的界面和边界层的影响。对表面包覆了不同厚度SiO_(2)的不同尺寸的BaTiO_(3)纳米颗粒经烧结得到的BaTiO_(3)@SiO_(2)复合陶瓷材料进行微观表征与储能性能对比研究。研究发现,采用SiO_(2)包覆BaTiO_(3)颗粒烧结的方法提高了陶瓷材料的击穿强度和放电能量密度。减小BaTiO_(3)纳米颗粒的尺寸使BaTiO_(3)与SiO_(2)的界面大量增加,这影响了新相的形成并且使晶体结构发生变化。导致使用较大填料颗粒的BaTiO_(3)@SiO_(2)复合陶瓷材料比使用极细填料颗粒的BaTiO_(3)@SiO_(2)复合陶瓷材料具有更致密的金相组织,更高的击穿场强和更高的放电能量密度。To obtain a high breakdown field and energy density of the energy storage capacitor based on composite ceramic materials,one of the difficulties is to study the effects of the interface and boundary layer of nanoparticles of the composite ceramic materials.In this paper,the characteristics and energy storage properties of BaTiO_(3)@SiO_(2) composite ceramic materials obtained by sintering of BaTiO_(3) particles coated with SiO_(2) of different thicknesses were studied.It is found that the breakdown strength and discharge energy density of ceramic materials were improved by sintering BaTiO_(3) particles coated with SiO_(2).Reducing the size of BaTiO_(3) particles greatly increased the interface between BaTiO_(3) and SiO_(2),which affected the formation of new phases and changed the crystal structure.As a result,BaTiO_(3)@SiO_(2) composite ceramics using larger filler particles have denser metallographic microstructure,higher breakdown field strength,and higher discharge energy density than BaTiO_(3)@SiO_(2) composite ceramics using extremely fine filler particles.

关 键 词：复合材料 表面包覆 击穿场强 能量密度 纳米颗粒界面 

分 类 号：TU528.1[建筑科学—建筑技术科学]