超声波化学共沉淀法制备SiO_2/Fe_3O_4复合粒子  

Preparation of SiO_2/Fe_3O_4 Composite Particles by Ultrasonic Chemical Co-precipitation

作　　者：邵义[1] 刘平虎 赵梦琪[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《中国陶瓷工业》2015年第1期1-4,共4页China Ceramic Industry

摘　　要：为了防止纳米级Fe3O4的氧化及团聚,在其表面包覆一层二氧化硅,本文设计了Si O2/Fe3O4复合粒子的制备工艺。本论文采用的制备方法是超声波化学共沉淀法,用X-射线衍射仪(XRD)、扫描电镜(SEM)、傅里叶红外转换光谱(FTIR)、低温氮吸附比表面积测试仪等研究了粒子晶相、组织形貌及化学键。结果表明,Si O2/Fe3O4复合粒子形貌为球形,表面具有孔隙,颗粒平均尺寸约250 nm。Si O2/Fe3O4复合粒子不仅具有良好的化学稳定性和生物相容性,而且为下一步表面修饰打下坚实的基础。In order to inhibit oxidation and agglomeration of Fe3O4 nanoparticles, a silica film was coated onto the surface of Fe3O4 nanoparticles by ultrasonic chemical co-precipitation. The crystalline phase, microstructure morphologies and chemical bonds were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Fourier infrared spectroscopy（FTIR）, and N2 adsorptiondesorption analysis. The results show that Si O2/ Fe3O4 composite particles, about 250 nm, were mostly spherical with a little agglomeration and lots of mesopores. Si O2/Fe3O4 composite particles not only exhibit excellent chemical stability and biological compatibility, but also lay a solid foundation for further surface modification.

关 键 词：Si02/Fe304复合粒子 超声波化学共沉淀法晶相 组织形貌 化学键 化学稳定性 生物相容性 表面修饰 

分 类 号：TB383.1[一般工业技术—材料科学与工程]