Al_2O_3包覆Ba_(0.6)Sr_(0.4)TiO_3复合粉体制备及表征  

Preparation and Characterization of Al_2O_3-Coated Ba_(0.6)Sr_(0.4)TiO_3 Composite Powders

作　　者：王通[1] 高峰[1] 胡国辛[1] 刘亮亮[1] 李博[1] 田长生[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《无机化学学报》2010年第5期811-816,共6页Chinese Journal of Inorganic Chemistry

基　　金：航空科学基金(No.09G53063);西安应用材料创新基金(No.XA-AM-200808);西北工业大学基础研究基金;西北工业大学研究生创业种子基金(No.Z200910)资助项目

摘　　要：采用液相包覆法制备了Al2O3包覆的Ba0.6Sr0.4TiO3复合粉体。通过SEM,TEM,TG-DSC,XRD,XPS和ζ电位测试对包覆前后粉体的表面形貌、组织结构、等电点进行了测试和分析。结果表明:Al2O3以无定形结构成功的包覆在Ba0.6Sr0.4TiO3粉体表面,形成了Ba-O-Al、Sr-O-Al和Ti-O-Al键,Ba0.6Sr0.4TiO3颗粒的等电点由包覆前的pH=3.2增大至pH=8。Ba0.6Sr0.4TiO3-Al2O3（BSTO-Al2O3） composite powder was prepared by liquid-phase cladding process. The surface morphology, structure and the zeta potential of uncoated and alumina-coated BSTO powder were characterized by SEM, TEM, TG-DSC, XRD,XPS and Malvern Instruments Zetasize Systems. The results indicate that the alumina nanofilms exist in amorphous hydrated alumina phase and anchor at the surfaces of Ba0.6Sr0.4TiO3 particles via Ba-O-Al、Sr-O-Al and Ti-O-Al bonding, the Isoelectric point （IEP） of Ba0.6Sr0.4TiO3 particle shifts from pH=3.2 to pH=8.

关 键 词：钛酸锶钡 氧化铝 表面包覆 复合粉体 

分 类 号：TQ174.758[化学工程—陶瓷工业] O614.21[化学工程—硅酸盐工业]