项目名称: Fe-N 磁性纳米颗粒的各向异性调控及其高频性能的研究
项目编号: No.51501003
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 一般工业技术
项目作者: 宋宁宁
作者单位: 北京化工大学
项目金额: 20万元
中文摘要: 随着电子器件高频段化、微型化、高性能化及低能耗化的发展,对磁性材料的高频性能提出了新的挑战。Fe-N 磁性纳米颗粒作为新兴的磁性纳米材料具有高饱和磁化强度、高居里温度等特点已经成为非常有研究潜力的新型非稀土磁性材料。在本项目中,拟通过化学的方法,制备具有高形状各向异性的Fe-N 磁性纳米颗粒。并通过对Fe-N 磁性纳米颗粒的形貌因素(例如长径比)、Co掺杂的化学配比的调控、有序阵列的定向处理及与高分子有机聚合物相混合等手段,系统研究其磁各向异性(形状各向异性和磁晶各向异性)、磁耦合作用对其高频微波性能的影响,全面优化具有各向异性的Fe-N磁性纳米颗粒的高频微波性能。有望为解决传统的铁基磁性材料不能同时增大磁导率和共振频率的难题提供一个良好的解决方案。
中文关键词: Fe-N;纳米颗粒;高频微波吸收;化学合成;磁各向异性
英文摘要: With the high-frequency electronic devices being smaller, faster, and lower power consumption, the magnetic materials faces new challenges in high-frequency performance. As a new magnetic nanomaterial, Fe-N magnetic nanoparticles with high saturation magnetization and high Curie temperature have become a kind of non-rare magnetic material with great research potential. In this project, Fe-N magnetic nanoparticle with shape anisotropy will be synthesized by chemical method. And investigate the effect of magnetic anisotropy (shape anisotropy and magnetic crystal anisotropy) and magnetic coupling on the high-frequency properties by regulating the shape factor (eg aspect ratio, particle size, etc.), stoichiometry, arrangement of nanoparticle and mixing with the organic polymer, which will optimize the high-frequency microwave properties of anisotropic Fe-N magnetic nanoparticles. It is expected to provide a better solution to solve the traditional problem in iron-based magnetic materials that the permeability and resonance frequency cannot be increased simultaneously.
英文关键词: Fe-N nanoparticles;high-frequency micowave;chemical synthsis ;magnetic anisotropy