论文部分内容阅读
顾名思义,磁流体(Ferromagnetic Fluid)是流体状态的磁性体。本来它是研究宇宙航行的一种产物,以后人们充分利用它能被磁铁吸引这一特点,将其应用到各种工业领域,例如能量技术、金属回收系统和医疗方面等。近几年来,音频技术发展很快,需要有高性能、多功能的器件和设备。随着扬声器系统多样化的进展,大型落地式扬声器要求扩大其动态范围;超小型扬声器要求克服低频特性差的缺点。把磁流体用于扬声器,就能研制出满足上述要求的扬声器系统。可以认为,在音频领域,磁流体是一种很有发展前途的材料。一、磁流体磁流体是把氧化铁(Fe_2O_3、Fe_3O_4)的微粒(约100A°)均匀分散在溶剂中形成的液体,靠表面活性剂的作用,保持稳固的胶体状态(图1),因此整个磁流体可像磁性体
As its name implies, Ferromagnetic Fluid is a magnetic fluid in a fluid state. Originally, it was a product of the study of cosmic voyage. Afterwards, people made full use of its attraction to magnets and applied it to various industrial fields such as energy technology, metal recovery systems and medical treatment. In recent years, audio technology has developed rapidly, requiring high-performance, versatile devices and devices. As the diversity of loudspeaker systems progresses, large floor-to-ceiling loudspeakers are required to expand their dynamic range; ultra-small loudspeakers are required to overcome the drawbacks of poor low frequency performance. The magnetic fluid used in the speaker, we can develop to meet the above requirements of the speaker system. It can be considered that in the audio field, magnetic fluid is a very promising material. First, the magnetic fluid Magnetic fluid is iron oxide (Fe_2O_3, Fe_3O_4) particles (about 100A °) uniformly dispersed in the solvent to form a liquid, by the role of surfactants, to maintain a stable colloidal state (Figure 1), the entire Magnetic fluid can be magnetic