温度对Ni0.5Zn0.5Fe2O4磁流体粘度的相关性  

Experimental Study on the Correlation Between Temperature and Viscosity of Ni 0.5 Zn 0.5 Fe 2O 4 Magnetic Fluid

作　　者：朱启晨 吴张永[1] 蔡晓明[1] 张莲芝[1] 莫子勇[1] ZHU Qichen;WU Zhangyong;CAI Xiaoming;ZHANG Lianzhi;MO Ziyong(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500

出　　处：《材料科学与工程学报》2020年第6期989-994,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51165012);云南省教育厅科学研究基金资助项目(2015Y080)。

摘　　要：为研究温度与Ni0.5Zn0.5Fe2O4磁流体粘度的相关性,采用两步法制备磁流体样品,在不同温度下研究其沉降稳定性。研究得出:选用月桂酸、乳化剂OP-7作为分散剂、硅油作为基液,制得的磁流体具有更好的沉降稳定性。分别在有磁场和无磁场条件下,探究温度变化对磁流体粘度特性的影响。研究结果表明:硅油基磁流体具有更好的粘温特性;温度影响磁流体的流体类型,无磁场条件下,当温度低于20℃时,磁流体呈现非牛顿流体特征;磁流体粘度随磁感应强度增加而增大,且随温度增加粘度比表现为先减后增规律。In order to study the correlation between temperature and viscosity of Ni 0.5 Zn 0.5 Fe 2O 4 magnetic fluid,a two-step method was employed to prepare magnetic fluid samples,and the sedimentation stability was studied at different temperatures.This research shows that magnetic fluid has better sedimentation stability when lauric acid,emulsifier OP-7 is used as the dispersing agent and silicone oil is used as the base liquid.Under the condition of magnetic field and free of magnetic field,the influence of temperature change on the viscosity characteristics of the magnetic fluid was investigated.The result suggests that the silicone oil-based magnetic fluid has better viscosity-temperature characteristic.Temperature affects the fluid type of the magnetic fluid,and under the condition free of magnetic field,the magnetic fluid exhibits non-Newtonian fluid characteristics when the temperature is below 20℃.The viscosity of the magnetic fluid increases with the increase of the magnetic induction intensity,and the viscosity ratio decreases first and then increases with the increase of temperature.

关 键 词：Ni0.5Zn0.5Fe2O4磁流体 稳定性 粘度特性 磁场 温度 

分 类 号：TB34[一般工业技术—材料科学与工程]