化学法合成Nd-Fe-B磁性纳米粒子的评述—微结构与磁性能  

Review on Chemical Synthesis of Nd-Fe-B Magnetic Nanoparticles:Microstructure and Magnetic Properties

作　　者：孟庆宇 尤俊华[1] 周继凤 刘子宇 Meng Qingyu;You Junhua;Zhou Jifeng;Liu Ziyu(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《稀有金属材料与工程》2022年第4期1253-1262,共10页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51401130);Liaoning Provincial Natural Science Foundation of China(2019-MS-244);LiaoNing Revitalization Talents Program(XLYC1907031);Liaoning BaiQianWan Talents Program(2020921082)。

摘　　要：高性能钕铁硼磁体广泛应用于各个领域。当Nd-Fe-B磁粉的晶粒尺寸接近单畴临界尺寸时,其矫顽力最大。化学法制备Nd-FeB磁粉可以很好地控制磁粉的微观结构和晶粒尺寸。同时,金属盐作为前驱体和简单的工艺流程可以降低成本和能源损耗。介绍了几种化学法制备Nd-Fe-B磁粉,分别为溶胶凝胶法、自燃烧法、微波辅助燃烧法、热分解法和机械化学法。研究了这些化学法的制备工艺和反应机理。最后,对不同化学方法合成的Nd-Fe-B磁粉的显微组织进行了对比分析,阐述了微观组织与磁性能之间的联系,展望了磁性材料未来的发展趋势。High-performance Nd-Fe-B magnets are widely needed in various fields.The purpose of studying Nd-Fe-B nanometer magnetic powder is that the coercivity of the powdered magnets is the largest at the single domain size.The preparation of nanoparticles by the chemical method can better control the microstructure and grain size.Moreover,metal salts as precursors and simplified process routes can significantly reduce costs and energy consumption.In this review,several popular chemical methods for synthesizing Nd-Fe-B nanoparticles were reported,including sol-gel,auto-combustion,microwave-assisted combustion,thermal decomposition,and mechanochemical method.The preparation process and reaction mechanism of these methods were discussed.Finally,the relationship between microstructure and magnetic properties of Nd-Fe-B nanoparticles prepared by different chemical methods was summarized and some future trends and perspectives in the magnetic research areas were submitted.

关 键 词：钕铁硼 磁性纳米粒子 化学法合成 居里温度 

分 类 号：TB383.1[一般工业技术—材料科学与工程]