二氧化硅/MeFe2O4中空复合微球的制备、结构及其磁性能

功能材料, 2010, 41(7): 1232-1235.

二氧化硅/MeFe2O4中空复合微球的制备、结构及其磁性能

周田 ^1, , 袁俊杰 ^2, , 浦鸿汀 ^3, , 杨正龙 ^4,

1.同济大学,材料科学与工程学院,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092

2.同济大学,材料科学与工程学院,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092

3.同济大学,材料科学与工程学院,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092

4.同济大学,材料科学与工程学院,上海,200092;同济大学,先进土木工程材料教育部重点实验室,上海,200092

基金项目: 国家自然科学基金资助项目(50803046)

关键词：中空二氧化硅 , 磁性微球 , 制备 , 共沉淀 , 磁性能

Preparation,structure and magnetic properties of silica/MeFe2O4 hollow composite spheres

采用磺酸基团官能化中空二氧化硅微球为模板,通过化学共沉淀法,将尖晶石铁氧体(MeFe2O4)包覆在中空二氧化硅微球表面,制备出二氧化硅/MeFe2O4中空复合微球.利用TEM、XRD和样品振动磁强计对中空复合微球的形貌、结构和磁性能进行表征.实验结果表明,通过调节三价铁盐与二价金属离子之间的比例可以将尖晶石铁氧体的粒径范围控制在15nm以下.所制备的复合中空微球具有优良的软磁性.当金属离子总浓度为0.10mol/L时,复合微球的饱和磁化强度可达9.75Am2/kg.

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