摘要
采用化学共沉淀法制备纳米Fe_3O_4磁颗粒,用油酸钠作表面活性剂对其进行表面改性,用硅油作为载液制备出硅油基磁流体。重点研究了氨水的不同添加顺序及氨水的不同添加速度对磁流体性能的影响,通过磁性能测试、观察磁流体静置后的沉降现象以及透射电镜对磁流体进行表征,结果表明先加氨水再加油酸钠制备的磁流体分散稳定性好,其饱和磁化强度为11.4(A·m^2)/kg,进一步研究了以10 mL/min速度滴加氨水再加油酸钠,得到的磁流体分散稳定性较好,其饱和磁化强度为14.3(A·m^2)/kg。
Fe_3O_4 magnetic nanoparticles were prepared by a coprecipitation method with sodium oleate as surfactant modification, and magnetic fluid was prepared with silicon oil as the carrier. The influence of different adding ammonia orders and different adding speeds on the property of magnetic fluid was studied. The Fe_3O_4 magnetic fluid was tested by VSM, the settlement after standing and TEM. The results show that when the ammonia is added before the sodium oleate, the dispersivity of the magnetic liquid is the best and the saturation magnetization is 11.4（A·m-2）/kg. Furthermore, with dripping ammonia at a speed of 10 m L/min before adding the sodium oleate, the dispersivity of the magnetic liquid is better and the saturation magnetization is 14.3（A·m-2）/kg.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第6期1609-1614,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51274039)
关键词
FE3O4
氨水
磁性能
分散性
磁流体
Fe3O4
ammonia
magnetic property
dispersivity
magnetic fluid
