室温合成BaTiO_3纳米晶的生长机制研究  

Formation mechanism of BaTiO_3 nanocrystalline synthesized at room temperature

作　　者：吴诗嫣 裴静远 孟杰[1] 林清云 陈涛[1] 魏晓[1] 李吉学[1] 张泽[1] WU Shi-yan;PEI Jing-yuan;MENG Jie;LIN Qing-yun;CHEN Tao;WEI Xiao;LI Ji-xue;ZHANG Ze(Center of Electron Microscopy,State Key Laboratory of Silicon Materials,and Department of Materials Science and Engineering,Zhejiang University,Hangzhou Zhejiang 310027,China)

机构地区：[1]浙江大学电镜中心,浙江大学材料科学与工程学院,浙江杭州310027

出　　处：《电子显微学报》2018年第2期110-115,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.11234011,11327901,51102208);中央高校基本科研业务专项资金资助(Nos.2014QNA4008,2017QNA4011).

摘　　要：钛酸钡是电子陶瓷中使用最广泛的材料之一,低温大规模合成纳米钛酸钡对节能减排,降低器件成本有非常重要的意义。本文分别以乙酸钡(Ba(CH_3COO)_2)和钛酸四丁酯(Ti(C_4H_9O)_4)为钡源和钛源,乙二胺为溶剂,在室温下成功制备了钛酸钡纳米材料。通过XRD和TEM表征,分析了室温下钛酸钡纳米晶的生长机制,并探讨了乙二胺在钛酸钡生长过程中的作用。研究结果表明室温下钛酸钡纳米晶在生长过程中遵循"溶解-结晶"和定向聚集生长两种机制。溶剂乙二胺对钛酸钡成核过程有促进作用,对晶体生长过程有抑制作用。BaTiO3 is one of the most widely used electronic ceramic materials.Large-scale synthesis of nano-BaTiO3 at low temperatures has great significance on energy conservation and emissions reduction.We successfully prepared BaTiO3 nanocrystalline by room-temperature synthesis with Ba(CH3COO)2 as the source of Ba,Ti(C4H9O)4 as the source of Ti,and ethylenediamine as the solvent.In addition,the paper studied the growth mechanism of BaTiO3 nanocrystalline and the influence of EDA on the forms and sizes of BaTiO3 nanoparticles by TEM and XRD methods.The experimental results showed that the growth of BaTiO3 nanoparticles proceeded via either“dissolution-crystallization”or directional aggregation.Ethylenediamine had a promoting effect on the nucleation process of barium titanate,and had an inhibitory effect on crystal growth process.

关 键 词：纳米钛酸钡 室温合成 乙二胺 晶体生长 

分 类 号：TB383[一般工业技术—材料科学与工程] TG115.215.3[金属学及工艺—物理冶金]