磁流体制备及性质研究  

Study on preparation and properties of magnetic fluid

作　　者：刘晓龙[1] 韦宗慧[1] 冯超[1] 段以恒[1] 王中平[1] 张增明[1] 

机构地区：[1]中国科学技术大学物理学院,安徽合肥230026

出　　处：《物理实验》2012年第8期6-10,共5页Physics Experimentation

基　　金：国家自然科学基金理科物理学基地(2011);中国科学技术大学教学项目(2011)

摘　　要：采用化学共沉淀法制备了纳米Fe3O4磁性颗粒,将其均匀分散在载液中获得磁流体.给出了表征所制备样品的宏观和微观特性图谱,探究了样品的磁热效应、法拉第效应和克尔效应,并制作了磁流体薄膜显示器.通过对磁流体样品的分析,获得其最佳的油酸钠包裹量为0.0216g/mL,样品颗粒小,稳定性高,磁热效应明显.研究发现磁流体薄膜的透射率随磁场变化明显,测量费尔德系数时必须考虑透射率的影响.磁流体样品存在异常克尔信号.The nano-Fe304 magnetic particles were prepared using chemical precipitation, and the magnetic fluid was obtained through dispersing nano-Fe304 magnetic particles evenly into the carrier liquid. The structure properties of samples were studied by XRD and TEM. The magneto-thermal effect, Faraday effect and Kerr effect were studied for these magnetic fluid samples. And the ferrofluid thin film display was successfully achieved. The optimal parameter was obtained, such as the packing sodium oleate 0. 021 6 g/mL. The particles had small size and high stability, magneto-thermal effect was remarkable. The transmissivity of magnetic fluid film changed obviously when the magnetic induction changed, so the effect of transmittivity must be considered for the measurement of Verdet constant. The abnormal Kerr effect existed in magnetic fluid.

关 键 词：磁流体 磁热效应 法拉第效应 克尔效应 磁流体显示 

分 类 号：TB383[一般工业技术—材料科学与工程]