水对BaTiO_3纳米晶体形状及尺寸的影响

Influence of Water in Synthesis of BaTiO_3 Nanocrystal

采用复合氢氧化物熔剂法(CHM),以BaCO3和TiO2为原料在200℃、48 h的生长条件下成功合成出立方相BaTiO3纳米晶体,研究了加入不同剂量去离子水对晶体生长的影响。用X射线衍射仪(XRD)、扫描电镜(SEM)对产物的晶相、形貌进行了分析。结果显示,获得的BaTiO3晶粒平均尺寸可从70 nm增加到400 nm,加水还可以将BaTiO3晶粒由立方形调节为近似球形。

BaTiO3 nanocrystalline particles starting from BaCO3 and TiO2 have been successfully synthesized by CHM method at 200 ℃ for 48 h. The influences of water in synthesizing process have been investigated. Morphology and particle size were characterized by XRD and SEM, indicating that sphere-like BaTiO3 nano-samples with sizes of 70-400 nm could be got when adding some water in raw materials.