摘 要: 介绍了沉淀法、水热法、微乳液法、溶胶- 凝胶法及高温分解 法等合成纳米 Fe₃O₄ 磁性粒子的方法及其特点。并对可用于纳米 Fe₃O₄ 磁性粒子表面改性的表面化学法、溶胶- 凝胶法、沉淀反应法、 聚合物包覆法及静电自组装等改性方法进行了概述, 最后对纳米 Fe₃O₄ 磁性粒子的研究前景进行了展望。 

关键词: 磁性材料; 纳米 Fe₃O₄; 制备; 表面改性

Abstract: The preparation methods and their characteristics of nano sized Fe₃O₄ magnetism particles were introduced, among which were precipitation, hydrothermal method, micro-emulsion, sol- gel and high temperature heat decomposition etc. Particularly the current surface mod ification methods of nano-sized Fe₃O₄ magnetism particles, such as sur face chemical modification, sol- gel modification, deposition modifica tion polymer, polymer coated modification and layer-by-layer electro static self-assembly etc. were described in detail. Furthermore, the re search prospect of nano-sized Fe₃O₄ magnetism particles was presented. 

Keywords: magnetic materials; nano-sized Fe₃O₄; preparation; surface modification