纳米级铁氧磁流体磁性粒子的制备工艺及其性能测试  

Preparation and properties of the nano-sized of ferrite magnetic particles

作　　者：丁秀云[1] 马啸华[1] 王淑英[1] 马淮凌[1] 

机构地区：[1]商丘师范学院化学系,河南商丘476000

出　　处：《信阳师范学院学报（自然科学版）》2005年第4期452-453,488,共3页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省自然科学基金资助项目(0424220173)

摘　　要：采用化学共沉淀法制备了纳米级铁氧体磁性粒子,用古埃磁天平对产品性能进行了测试,用透射电子显微镜对其结构进行了表征.研究结果表明,保持碱过量比y=0.25,温度T=80℃,加热时间t=120m in,表面活性剂用量比n=0.6等条件时,得到的磁性粒子磁性能达到最强,磁流体的粒子状形态且分散较好,颗粒较均匀,粒度分布较窄,平均直径接近10 nm.The nano-sized ferrite magnetic particles were prepared by chemical precipitation. The properties were investigated by VSM. And the size, appearance and magnetism of Fe3O4 nanoparticles charaterized using TEM. The results show that the nagnetic particles have the strongest magnetic properties under the conditions of Y 0. 25, temperatare 80 ℃, heating time 120 min and the ration of surfacant n 0.6. Additionally, the average diameter of oartides is about 10 nm with the almost samc size.

关 键 词：纳米级 磁流体 铁氧体 磁性粒子 制备 

分 类 号：TM277[一般工业技术—材料科学与工程]