溶胶-水热法制备纳米SrTiO_3及其表面包覆Al_2O_3的研究  

Synthesis of SrTiO_3 Nanopowders by Sol-Hydrothermal Method and Their Surface Coating with Al_2O_3

作　　者：王宁章[1] 刘世丰 刘静[2] 容世龙 

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西大学材料科学与工程学院,南宁530004

出　　处：《材料导报》2015年第4期37-39,共3页Materials Reports

摘　　要：采用溶胶-水热法制备纳米SrTiO3粉体,并采用非均匀形核法在纳米SrTiO3粉体颗粒表面包覆一层Al2O3。借助X射线衍射仪(XRD)、激光粒度分析仪(SL)、红外光谱分析仪(FT-IR)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)对样品进行比较分析。结果表明,用溶胶-水热法制得的SrTiO3粉体颗粒具有较小的粒径,但团聚现象比较严重;经过表面包覆Al2O3后的SrTiO3粉体颗粒粒径小,形状规则,呈球状,分散性好,分布均匀,团聚现象得到改善。SrTiO3 nanopowders were prepared through sol-hydrothermal method, and were subsequently coated with a layer of Al2O3 using heterogeneous nucleation method. By means of X-ray diffractometer （XRD）, laser particle size analyzer （SL）, infrared spectroscope （FT-IR）, scanning electron microscope （SEM） and transmission electron microscope （TEM）, comparative analyses of the prepared samples were conducted. The results showed that SrTiO3 powders synthesized though sol-hydrothermal method had relatively small particle size, but with a certain agglomeration. After surface coated with Al2O3, SrTiO3 powders had small size, regular shape, spherical morphology, good dispersibility, uniform distribution, and diminished agglomeration.

关 键 词：溶胶-水热法 纳米SrTiO3 非均匀形核法 包覆 

分 类 号：TB321[一般工业技术—材料科学与工程] TB331