摘要
以锐钛矿型TiO_(2)为钛源、Li_(2)CO_(3)为锂源,SiC微球为微波良导体,采用微波微区域固相法制备了形貌均一且具有良好分散性的Li_(4)Ti_(5)O_(12)粉体。利用XRD、SEM、TG、蓝电测试系统等仪器对样品的结构及电学性能进行表征。结果表明,SiC微球能形成多点均匀热源,可有效降低粉体的煅烧温度,并提高粉体的分散和均匀性,在700℃保温40 min的条件下,合成了平均粒径为200 nm的纯相钛酸锂粉体,较传统固相合成钛酸锂粉体温度降低100℃以上,合成时间缩短90%。
Using anatase TiO_(2)as the titanium source,Li_(2)CO_(3)as the lithium source,and SiC microspheres as a good microwave conductor,a uniform morphology and good dispersibility Li_(4)Ti_(5)O_(12)powder is prepared by the microwave micro-area state method.The structure and electrical properties of the samples are characterized by XRD,SEM,TG,LAND and other instruments.The results show that SiC microspheres can form a multi-point uniform heat source,which can effectively reduce the calcination temperature and increase the dispersion and uniformity of the powders.Under the condition of heat preservation at 700℃for 40 min,pure phase lithium titanate powder with an average particle size of 200 nm is synthesized,which is more than 100℃lower than the temperature of traditional solid state synthesis lithium titanate powder.The synthesis time is reduced by 90%.
作者
方荣宇
朱归胜
徐华蕊
韩茵
董艺
赵昀云
沓世我
付振晓
FANG Rongyu;ZHU Guisheng;XU Huarui;HAN Yin;DONG Yi;ZHAO Yunyun;TA Shiwo;FU Zhenxiao(Guangxi Key Laboratory of Information Materials,School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangdong Fenghua High-tech Co.,Ltd.,State Key Laboratory of Key Materials and Processes forNew Electronic Components,Zhaoqing 526020,China)
出处
《功能材料》
CAS
CSCD
北大核心
2021年第8期8112-8117,共6页
Journal of Functional Materials
基金
广西重大科技专项资助项目(AA18118001)
国家自然科学基金资助项目(61540073)
广西创新团队资助项目(2019GXNSFGA245005)
广西信息材料与构效关系重点实验室基金资助项目(201002-Z)
广西科技基地和人才专项资助项目(桂科AD18281027)。
关键词
微波合成
固相法
钛酸锂
电池
电化学
microwave synthesis
solid state method
lithium titanate
battery
electrochemistry
