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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
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
关键词
钛酸锶钡
氧化铝
表面包覆
复合粉体
barium strontium titanate
aluminum oxide
surface coating
composite powders
