基于纳米磁性液体磁特性的演示试验研究

The Demonstrative Experiment Research on Magnetic Properties of Nano-magnetic Fluid

根据纳米磁性液体在外加磁场条件下的磁场可视特性,搭建了"纳米磁性液体磁特性的演示试验装置"。利用此试验装置,可演示纳米磁性液体在圆锥螺旋塔下的形状变化及运动变化,圆锥螺旋塔周围的磁场强度变化导致了这种变化和运动,而这种变化和运动又可以反映圆锥螺旋塔周围的大致磁场空间分布。从物理学角度,定性地分析了这种变化和运动。该演示试验能够激发学生深入研究相关知识的兴趣,对于提高学生学习相关科学文化知识的热情有重要作用。

In this paper,based on the visual property of magnetic field in nano-magnetic fluid under the external magnetic field,the demonstrative experiment apparatus about the magnetic property of nano-magnetic fluid was built up.This apparatus can present the shape and moving changes of nano-magnetic fluid in the conical spiral tower.The magnetic changes around the conical spiral tower result from the variation of magnetic strength around the tower.Also,the changes reflect the general magnetic field distribution around the tower.From the point of physic,these changes are analyzed qualitatively.This demonstrative experiment can stimulate learning interest of students on interrelated knowledge thoroughly,while it is important to improve students＇ passion of studying relevant science and technology knowledge.