摘要
采用水热法制备了水基Fe3O4磁流体,利用X衍射仪和透射电镜对磁粒子的组成、结构及粒径进行了分析,利用古埃磁天平研究了磁流体的饱和磁化强度和超顺磁性,研究了反应时间、温度、表面活性剂等主要工艺参数对磁流体性能的影响。实验结果表明:采用水热法,Fe2+:Fe3+的比值为1·0,水热反应温度为160℃,反应时间为6h,采用油酸钠和十二烷基苯磺酸钠混合表面活性剂,在适宜的时间加入,配合机械搅拌和超声分散可以制备出性能较好的水基Fe3O4磁流体。
The water-based Fe3O4 magnetic fluid was prepared by hydrothermal method in the experiment. The sample phase structure and particle sizes have been analyzed by an X -ray diffraction transmission and an electron microscopy, and the saturation magnetization intensity and superparamagnetic behaviors have been determined by a Gouy magnetic balance while the influence of reacting time, temperature, and surfactant on the property of the magnetic fluids also presented. The result shows that based on hydrothermal method, the ratio of Fe^2＋ ： Fe^3＋ is 1.0, reaction temperature is 160 ℃, the reaction time is 6 h. The suffactant is Sodium dodecy lbenzene sulfonate and Sodium oleate. Ifplacing them at the suitable time, and appling mechanical stirring and ultrasonic dispersing, we can prepare the water -based Fe3O4 magnetic fluid with good performance.
出处
《实验科学与技术》
2006年第4期11-14,共4页
Experiment Science and Technology
基金
教育部优秀青年教师资助计划项目
关键词
水热法
Fe3O4磁流体
饱和磁化强度
超顺磁性
粒径
hydrothermal method
Fe3O4 magnetic fluid
saturation magnetization intensity
superparamagnetic behaviors
particle size
