纳米γ-Fe_2O_3粒子的制备及其性能研究  

Preparation and properties of γ-Fe_2O_3 nano-particle

作　　者：王英会[1] 刘宏英[1] 姜炜[1] 李凤生[1] 陈令允[1] 杨毅[1] 

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,南京210094

出　　处：《材料科学与工艺》2008年第3期439-441,共3页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50306008);江苏省自然科学基金资助项目(BK2003421)

摘　　要：以乙二醇作为前驱体,采用溶胶——凝胶法制备出了纳米γ-Fe2O3粒子,讨论了灼烧温度等对粒子大小、形貌、磁性等的影响,并采用红外光谱、X射线衍射光谱、透射电子显微镜、比表面分析仪及振动样品磁强计等对粒子的性能进行表征.结果表明:当烧结温度为450℃时,实验所得到的粒子的粒径最小,为5nm左右,磁性最强,比饱和磁化强度为65 emu.g-1,且分散较均匀.The nanocrystal γ-Fe2O3 was prepared by sol - gel method, in iron nitrate and 2 - methoxyethanol solution. The grain size, surface appearance and magnetization were effected by the sintering temperature Then the product was characterized by Fourier transform infrared spectra （ FTIR）, X - ray photoelectron spectroscopy （ XPS）, powder X - ray diffraction （ XRD）, transmission electronic microscopy （ TEM ） and vibrating - sample magnetometer （VSM）. The results show that the average diameter of particles is the smallest and is about 5 nm at the sintering temperature of 450 ℃ the structure of nanocrystalγ-Fe2O3 has a good stability and better dispersion and the strongest magnetism is 65emu/g.

关 键 词：Γ-FE2O3 纳米粒子 溶胶-凝胶法 

分 类 号：O611[理学—无机化学] TB383[理学—化学]