| 镝钴铁氧体磁流体的制备与性质研究 |
| |
| 引用本文： | 刘永超,蒋荣立,赵文涛.镝钴铁氧体磁流体的制备与性质研究[J].湖南文理学院学报(自然科学版),2004,16(2):14-17,44. |
| |
| 作者姓名： | 刘永超 蒋荣立 赵文涛 |
| |
| 作者单位： | 中国矿业大学环境工程系,江苏,徐州,221008;中国矿业大学用化学系,江苏,徐州,221008;中国矿业大学用化学系,江苏,徐州,221008 |
| |
| 摘 要： | 为了提高磁流体的抗氧化能力,我们采用化学共沉淀--超声波分散法制备了镝钴铁氧体磁流体,用Dy3 取代Co2 进行改性.利用古埃磁天平研究了温度、稀土镝改性、表面活性剂的表面改性、超声波分散时间对其磁性和稳定性的影响,并从理论上进行了分析.X射线衍射谱(XRD)、透射电镜(TEM)对制得的磁粒子组成、结构及粒径进行了分析.提高熟化温度,添加适量的镝有利于磁化强度的提高.
|
| 关 键 词： | 镝钴铁氧体磁流体 饱和磁化强度 稳定性 改性 |
Study of preparation and modification for Dysprosium Cobalt Ferrite Magnetic Fluids |
| |
| Abstract.Study of preparation and modification for Dysprosium Cobalt Ferrite Magnetic Fluids[J].Journal of Hunan University of Arts and Science:Natural Science Edition,2004,16(2):14-17,44. |
| |
| Authors: | Abstract |
| |
| Abstract: | In order to improve the resistivity of oxidation,dysprosium cobalt ferrite magnetic fluids were prepared by precipitation-sonication.Dysprosium modification is carried out replacing Co 2+ with Dy 3+ .Influences of temperature,amount of dysprosium and mechanism of surface modification on the magnetic properties and 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 sizes of the magnetic particles.In addition,effects of ultrasonic time on the stability of dysprosium cobalt ferrite magnetic fluids were also investigated in this study.Studies have shown that improving the curing temperature and adding the proper amount of Dy 3+ will increase the magnetic property for magnetic fluids. |
| |
| Keywords: | Dysprosium cobalt ferrite magnetic fluids Saturation magnetization Stability modification |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
