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

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

作者机构：Shool of Material Science and Engineering Shanghai University.Shanghai 200072 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2007年第20卷第6期

页      面：434-440页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

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

主　　题：Fe-based nanoparticle hvdrothermal specific saturation magnetization kinetics 

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.