纳米Fe_3O_4磁性流体的制备与测试  

Preparation and properties of nano-scale Fe_3O_4 magnetic fluid

作　　者：李定国[1,2] 熊永红[1] 许巍[2] 康颖[2] 章腾[2] 

机构地区：[1]华中科技大学物理学院,武汉430074 [2]海军工程大学理学院,武汉430033

出　　处：《海军工程大学学报》2009年第6期1-5,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(10274022)

摘　　要：采用化学共沉淀法制备Fe3O4磁性纳米颗粒,用油酸作为分散剂制备出煤油基和二脂基磁性流体。用X射线荧光光谱仪(XRF)、X射线衍射(XRD)测试分析颗粒的组成、结构、平均粒径,表明所制备的颗粒为纯净Fe3O4纳米粒子,其平均粒径小于15 nm,分布均匀。用傅立叶变换红外光谱仪(FTIR)、热重法(TGA)和导数热重量(DTG)分析法对磁性流体进行性能测试,结果表明磁性流体进行性能稳定,煤油基磁性流体工作温度应低于88.6℃,二脂基磁性流体的应低于236.0℃。The magnetic Fe3O4 colloid particulates were handled with the common chemical coprecipitation method.By cladding the colloid particulates with oleic acid mediate and dispersing evenly in air oil,diester-based magnetic fluid was prepared.The composition,structure and the mean particle sizes based on X-ray fluorescence（XRF） spectrometer,X-ray diffraction（XRD） analysis show that the prepared particles are pure Fe3O4 with an average particle size of 15 nm.By using the Fourier transform infrared spectroscopy（FTIR）,thermogravimetric analysis（TGA） and derivative thermogravi-metric analysis（DTG）,it is shown that the magnetic fluid performance is stable and that the air-oil based magnetic fluid temperature is below 88.6 ℃,and the diester-based magnetic fluid temperature lower than 236.0 ℃.

关 键 词：磁性流体 化学共沉淀法 纳米FE3O4 

分 类 号：O636[理学—高分子化学]