镝钴铁氧磁流体的制备与性质研究

摘要

为了提高磁流体的抗氧化能力,制备了镝钴铁氧磁流体.利用古埃磁天平研究了温度对磁性和稳定性的影响;研究了稀土镝磁性能的改性、表面活性剂的表面改性,并从理论上进行了分析.利用X射线衍射仪(XRD)、透射电镜(TEM)对制得的磁粒子的组成、结构及粒径进行了分析.%In order to improve the resistivity of oxidation, dysprosium cobalt ferrite magnetic fluids were prepared. Influences of temperature on magnetic property and stability, mechanism of dysprosium modification on the magnetic properties and surface modification on stability have been studied through a measurement device based on Gouy magnetic balance. X-ray diffraction (XRD) and transmission electron microscopy (TEM) are utilized to analyze the phase, structure and size of the magnetic particles.