纳米铁颗粒磁流变液的制备及性能

Preparation and Performance of Nano-iron Particles-based Magnetorheological Fluids

以直流电弧等离子体法制备的纳米铁颗粒为分散相制备磁流变液。实验表明所制备的颗粒为尺寸分布较为均一的球状颗粒,直径为30nm～50nm,且具有较高的饱和磁化强度。分别以纳米铁颗粒和羰基铁粉为分散相,二甲基硅油为基液制备颗粒含量相同的磁流变液。磁流变性能及沉降稳定性实验结果表明,纳米铁颗粒磁流变液具有显著的磁流变效应,且沉降稳定性优于羰基铁粉磁流变液。

Nano-iron particles which were used as the solid phase for magnetorheological fluids(MRF)in this work were prepared by DC electric arc discharge.The experimental results show that the prepared particles are spherical particles of uniform particle size(30nm^50nm in diameter)and they have high saturation magnetization.The magnetorheological fluids which dispersed nano-iron particles and carbonyl iron powder in silicone oil respectively were prepared.The mechanical properties and the sedimentation stability tests results show that the nano-iron particlesbased magnetorheological fluids have a pronounced magnetorheological effect,and the sedimentation stability is better than that of carbonyl iron powder based one.