FACILE HYDROTHERMAL SYNTHESIS AND GROWTH KINETICS OF Fe-BASED MAGNETIC NANOPARTICLES  

作　　者：C.X. You J.C. Zhang Y. Shen Z.W. Song 

机构地区：[1]Shool of Material Science and Engineering, Shanghai University.Shanghai 200072, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2007年第6期434-440,共7页金属学报（英文版）

基　　金：the National Natural Science Foundation of China （No.90206017）; National High Technical Reasearch and Development Programme of China （No.2003BA301A21 ）.

摘　　要：The facile hydrothennal method was used to synthesize Fe3O4 nanoparticles with an average diameter of 1 1nm. The pure body-centered cubic （bcc）-Fe nanoparticles were prepared by reduction of Fe3O4 nanoparticles powder in H2 atmosphere. The structure, morphology and magnetic＇properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, thermogravimetric analysis-differential scanning calorimetry （TGA-DSC） and vibrating sample magnetometer （VSM）. The results showed that the as-prepared Fe3O4 nanoparticles had a relatively homogeneous size. The particle diameters became bigger with the increase of reaction time. The growth kinetics of the Fe3O4 nanoparticles was also briefly discussed. The products exhibited superparamagnetic properties at room temperature and the specific saturation magnetization was dependent on the particle sizes.The facile hydrothennal method was used to synthesize Fe3O4 nanoparticles with an average diameter of 1 1nm. The pure body-centered cubic （bcc）-Fe nanoparticles were prepared by reduction of Fe3O4 nanoparticles powder in H2 atmosphere. The structure, morphology and magnetic＇properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, thermogravimetric analysis-differential scanning calorimetry （TGA-DSC） and vibrating sample magnetometer （VSM）. The results showed that the as-prepared Fe3O4 nanoparticles had a relatively homogeneous size. The particle diameters became bigger with the increase of reaction time. The growth kinetics of the Fe3O4 nanoparticles was also briefly discussed. The products exhibited superparamagnetic properties at room temperature and the specific saturation magnetization was dependent on the particle sizes.

关 键 词：Fe-based nanoparticle hvdrothermal specific saturation magnetization KINETICS 

分 类 号：TG143[一般工业技术—材料科学与工程]