各向异性纳米铁氧体磁性材料的制备  

PREPARATION OF ANISOTROPY NANO-MAGNETISM MATERIAL

作　　者：李志华[1] 钟云波[1] 任忠鸣[1] 邓康[1] 

机构地区：[1]上海大学上海市钢铁冶金重点实验室,上海200072

出　　处：《上海金属》2006年第1期53-57,62,共6页Shanghai Metals

基　　金：全国优秀博士学位论文作者基金(No.200235);国家自然科学基金(No.50404018);上海市科委纳米专项基金(No.0252nm048)

摘　　要：对纳米铁氧体磁性颗粒材料的制备方法进行了评述,探讨了磁场影响湿法制备不同磁性纳米颗粒形貌的可能性,并根据前人的研究结果以及作者的前期探索结果,表明磁场不但改变湿法化学反应的进程,对纳米颗粒的粒径也产生显著影响,还将影响纳米颗粒形貌。随着磁感应强度的增加,非磁性铁氧体前驱体纳米颗粒的形貌将由球状向链状、针状或纤维状形貌转变,进而提出了在强磁场下制备强各向异性纳米铁氧体磁性材料的设想。The method for the preparation of nano-ferrite material was evaluated, and the possibility of the magnetic field effect on the shape of different magnetism nano-particles was discussed. Based on the former results as well as the author＇s basic experimental phenomenon, it was shown that the magnetic field not only affected the process of chemical reaction, but also the diameter of the nano particles and its shape. With increasing the magnetic flux density, the shape of non-magnetism ferrite precursor particles would change from sphere to chain-like, then to acicular or fibre-like. A new proposal for the preparation of strong anisotropy ferrite materials was suggested.

关 键 词：纳米铁氧体颗粒 各向异性 磁场 制备方法 

分 类 号：TQ172.12[化学工程—水泥工业] TF521.1[化学工程—硅酸盐工业]