纳米超顺磁性铁氧体的制备与研究  

Preparation and Characterization of Nanosized Super Paramagnetic Ferrite

作　　者：王慧荣[1] 李代禧[1] 刘珊林[2] 纪兰兰[1] 吴晓莹[1] 

机构地区：[1]上海理工大学食品与低温生物医学研究所,上海200093 [2]复旦大学上海医学院生物化学系,上海200032

出　　处：《材料导报》2007年第F05期32-35,共4页Materials Reports

基　　金：国家自然科学基金(NSCF:50436030);上海市重点学科项目(T0503和P0502);上海市教委发展基金项目(05EZ21);上海理工大学启动基金(X544)

摘　　要：探讨了纳米超顺磁性铁氧体的制备条件及其性能特征。通过正交试验确定了最佳合成方法:应用化学共沉淀法,反应温度为80℃、pH值为9.0、[Zn2+]∶[Fe2+]为1∶5、反应时间为75min。同时利用X射线衍射(XRD)、透射电子显微镜(TEM)和振动样品磁强计(VSM)等进行表征,表明制备的样品为尖晶石结构,平均粒径7.7nm,大小均匀,比饱和磁强度为65.7563Am2/kg,具有良好的超顺磁性。Nanosized super paramagnetic ferrite is prepared by chemical co-precipitation method. The preparation condition and the characterizations of the title ferrite are also studied. The best preparation condition is defined based on the orthogonal design method. The sample with excellent magnetic targeting and stability is obtained when T=80℃,pH=9. 0,[Zn^2＋] ： [Fe^2＋]=1： 5, and t=75min. Then the sample prepared under the best synthetic condition is characterized by XRD, TEM and VSM. The analytic results show that the sample has the spinelle structure, uniform nanoparticle size（about 7.7 nm）, and good super paramagnetism （σ=65. 7563Am^2/kg）, so that it can be well applied to the bio-pharmaceuticals.

关 键 词：纳米铁氧体 靶向性 稳定性 超顺磁性 

分 类 号：TB383[一般工业技术—材料科学与工程]