SiO2包覆层对BaTiO3@SiO2复合陶瓷微观结构和储能性能的影响
Effects of SiO2 coating on microstructure and energy storage performance of BaTiO3@SiO2 composite Ceramics
刘嘉辰 1吴佳伟 1刘跃明 1同阳 1马江微 1雍辉 2胡季帆2
作者信息
- 1. 太原科技大学材料科学与工程学院,太原 030024;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
- 2. 太原科技大学材料科学与工程学院,太原 030024
- 折叠
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SiO2的不同尺寸的BaTiO3纳米颗粒经烧结得到的BaTiO3@SiO2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SiO2包覆BaTiO3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BaTiO3纳米颗粒的尺寸使BaTiO3与SiO2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BaTiO3@SiO2复合陶瓷材料比使用极细填料颗粒的BaTiO3@SiO2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.
Abstract
To obtain a high breakdown field and energy density of the energy storage capacitor based on compos-ite ceramic materials,one of the difficulties is to study the effects of the interface and boundary layer of nanop-articles of the composite ceramic materials.In this paper,the characteristics and energy storage properties of BaTiO3@SiO2 composite ceramic materials obtained by sintering of BaTiO3 particles coated with SiO2 of differ-ent thicknesses were studied.It is found that the breakdown strength and discharge energy density of ceramic materials were improved by sintering BaTiO3 particles coated with SiO2.Reducing the size of BaTiO3 particles greatly increased the interface between BaTiO3 and SiO2,which affected the formation of new phases and changed the crystal structure.As a result,BaTiO3@SiO2 composite ceramics using larger filler particles have denser metallographic microstructure,higher breakdown field strength,and higher discharge energy density than BaTiO3@SiO2 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Key words
composite materials/surface coating/breakdown field strength/energy density/nanoparticle interface引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据