无机化学学报
無機化學學報
무궤화학학보
JOURNAL OF INORGANIC CHEMISTRY
2010年
5期
811-816
,共6页
王通%高峰%胡国辛%刘亮亮%李博%田长生
王通%高峰%鬍國辛%劉亮亮%李博%田長生
왕통%고봉%호국신%류량량%리박%전장생
钛酸锶钡%氧化铝%表面包覆%复合粉体
鈦痠鍶鋇%氧化鋁%錶麵包覆%複閤粉體
태산송패%양화려%표면포복%복합분체
barium strontium titanate%aluminum oxide%surface coating%composite powders
采用液相包覆法制备了Al2O3包疆的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.
採用液相包覆法製備瞭Al2O3包疆的Ba0.6Sr0.4TiO3複閤粉體.通過SEM,TEM,TG-DSC,XRD,XPS和ζ電位測試對包覆前後粉體的錶麵形貌、組織結構、等電點進行瞭測試和分析.結果錶明:Al2O3以無定形結構成功的包覆在Ba0.6Sr0.4TiO3粉體錶麵,形成瞭Ba-O-Al、Sr-O-Al和Ti-O-Al鍵,Ba0.6Sr0.4TiO3顆粒的等電點由包覆前的pH=3.2增大至pH=8.
채용액상포복법제비료Al2O3포강적Ba0.6Sr0.4TiO3복합분체.통과SEM,TEM,TG-DSC,XRD,XPS화ζ전위측시대포복전후분체적표면형모、조직결구、등전점진행료측시화분석.결과표명:Al2O3이무정형결구성공적포복재Ba0.6Sr0.4TiO3분체표면,형성료Ba-O-Al、Sr-O-Al화Ti-O-Al건,Ba0.6Sr0.4TiO3과립적등전점유포복전적pH=3.2증대지pH=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 Malvem 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.
